阅读说明：本技术 一种提高台农17号菠萝果肉维c含量的制剂及施用方法 (Preparation for improving vitamin C content in Tainong No. 17 pineapple pulp and application method ) 是由 付山 李婷玉 阮云泽 于 2021-06-25 设计创作，主要内容包括：本发明公开了一种提高台农17号菠萝果肉维C含量的制剂及施用方法。所述制剂包含营养生长期专用制剂和生殖生长期专用制剂。所述的营养生长期专用制剂由以下重量份数的组分组成：无机复合肥46～48份,尿素33～35份,硫酸钾肥15～16份,EDTA铁1.6～1.8份,氧化镁1.2～1.4份,硼酸0.9～1.1份,EDTA锌0.6～0.8；所述的生殖生长期专用制剂由以下重量份数的组分组成：硫酸钾肥42～44份,无机复合肥32～34份,尿素16～18份,EDTA钙4～6份,氧化镁1～1.2份,硼酸0.6～0.8份。本发明的制剂配合使用,能够明显提高台农17号菠萝的结果率和维C含量,达到增产增收、提质增效的目的；且所用的成分均为速效性养分,水溶性好,适合大规模推广应用。(The invention discloses a preparation for improving the vitamin C content in Tainong No. 17 pineapple pulp and an application method thereof. The preparation comprises a special preparation for vegetative growth phase and a special preparation for reproductive growth phase. The special preparation for the vegetative growth period consists of the following components in parts by weight: 46-48 parts of inorganic compound fertilizer, 33-35 parts of urea, 15-16 parts of potassium sulfate fertilizer, 1.6-1.8 parts of EDTA iron, 1.2-1.4 parts of magnesium oxide, 0.9-1.1 parts of boric acid and 0.6-0.8 parts of EDTA zinc; the special preparation for the reproductive phase consists of the following components in parts by weight: 42-44 parts of potassium sulfate fertilizer, 32-34 parts of inorganic compound fertilizer, 16-18 parts of urea, 4-6 parts of EDTA calcium, 1-1.2 parts of magnesium oxide and 0.6-0.8 part of boric acid. The preparation disclosed by the invention is matched for use, so that the fruiting rate and the vitamin C content of the Tainong No. 17 pineapple can be obviously improved, and the purposes of increasing yield and income, improving quality and increasing efficiency are achieved; and all the used components are quick-acting nutrients, have good water solubility and are suitable for large-scale popularization and application.)

1. A preparation for improving the vitamin C content in pineapple pulp No. 17 of Tainong is characterized by comprising a special preparation for a vegetative growth phase and a special preparation for a reproductive growth phase;

the special preparation for the vegetative growth period consists of the following components in parts by weight: 40-50 parts of inorganic compound fertilizer, 32-36 parts of urea, 10-16 parts of potassium sulfate fertilizer, 1.6-1.8 parts of EDTA iron, 1.2-1.4 parts of magnesium oxide, 0.9-1.1 parts of boric acid and 0.6-0.8 part of EDTA zinc;

the special preparation for the reproductive phase consists of the following components in parts by weight: 42-44 parts of potassium sulfate fertilizer, 32-35 parts of inorganic compound fertilizer, 16-18 parts of urea, 4-6 parts of EDTA calcium, 1-1.2 parts of magnesium oxide and 0.6-0.8 part of boric acid.

2. The preparation for increasing the vitamin C content in the pineapple pulp No. 17 of Tainong as claimed in claim 1, wherein the special preparation for the vegetative growth phase comprises the following components in parts by weight: 46-48 parts of inorganic compound fertilizer, 32-35 parts of urea, 15-16 parts of potassium sulfate fertilizer, 1.6-1.8 parts of EDTA iron, 1.2-1.4 parts of magnesium oxide, 0.9-1.1 parts of boric acid and 0.6-0.8 parts of EDTA zinc;

the special preparation for the reproductive phase consists of the following components in parts by weight: 42-44 parts of potassium sulfate fertilizer, 32-34 parts of inorganic compound fertilizer, 16-18 parts of urea, 4-6 parts of EDTA calcium, 1-1.2 parts of magnesium oxide and 0.6-0.8 part of boric acid.

3. The preparation for increasing the vitamin C content in pineapple pulp No. 17 of Tainong as claimed in claim 1, wherein the inorganic compound fertilizer in the preparation special for vegetative growth phase and the preparation special for reproductive growth phase is 15-15-15 inorganic compound fertilizer.

4. The preparation for increasing vitamin C content in pineapple pulp No. 17 of Tainong as claimed in any one of claims 1 to 3, wherein the urea in the preparation specially used for vegetative growth phase and the preparation specially used for reproductive growth phase contains N46-47 wt%, and K in potassium sulfate fertilizer₂The mass percentage of O is 52-53%.

5. The application method of the preparation for improving the vitamin C content in the pineapple pulp No. 17 of Tainong as claimed in any one of claims 1 to 4, is characterized by comprising the following steps:

(1) during 35-40 d, 65-70 d, 120-125 d, 165-170 d, 195-200 d, 230-235 d and 260-265 d after the field planting of No. 17 Tainong pineapples, dissolving the special preparation for the vegetative growth period with water, and then carrying out drip irrigation once, wherein the application amount is 12-31 kg/mu each time;

(2) and during 370-375 d and 455-460 d after the field planting of the Tainong No. 17 pineapple, dissolving the special preparation for the reproductive growth period by using water, and then carrying out drip irrigation application, wherein the application amount is 24-26 kg/mu each time.

6. The application method of claim 5, wherein the application amount of the first 3 times of drip irrigation application of the special preparation for vegetative growth period in step (1) is 13-17 kg/mu, and the application amount of the drip irrigation application of the special preparation for vegetative growth period in the last 4 times of drip irrigation application is 18.5-20.5 kg/mu, 21-23 kg/mu, 26-28 kg/mu and 28.5-30.5 kg/mu in sequence.

7. The application method of claim 6, wherein the water is irrigated once every 7-10 days in the period of 7-8 months after the Tainong No. 17 pineapple is planted, and the irrigation amount is 5-8 m³Per mu.

8. The application method according to claim 5, wherein in the steps (1) and (2), before each drip irrigation application, clear water is used for irrigating for 10-12 minutes, then the preparation for increasing the pulp vitamin C content of the Tainong No. 17 pineapple is used for drip irrigation, and finally the clear water is used for irrigating for 12-15 minutes.

9. The application method according to any one of claims 5 to 8, wherein in the step (1), before the preparation special for vegetative growth phase is dissolved by water, the preparation special for vegetative growth phase is sieved by a 40-mesh sieve.

10. The application method according to any one of claims 5 to 8, wherein in the step (2), before the preparation special for the reproductive phase is dissolved in water, the preparation special for the reproductive phase is sieved by a 40-mesh sieve.

Technical Field

The invention relates to the technical field of pineapple planting, in particular to a preparation for improving the vitamin C content of Tainong No. 17 pineapple pulp and an application method thereof.

Background

Pineapple is one of important economic crops in tropical and subtropical regions, is second only to banana and mango in tropical fruit production and trade, and is an important economic crop in central and south america and asia and pacific regions. The pineapple is rich in nutrition and has high planting and edible values. The pulp contains a large amount of saccharides, vitamins, proteins, dietary fibers, organic acids and the like; and the fresh-eating food also contains rich nutrient elements such as potassium, calcium, phosphorus, iron and the like, and is greatly beneficial to maintaining the stability of electrolyte of cell sap in a human body. In addition, the pineapples can be processed into cans, and preserved fruits, fruit juice and the like can be made to enter the market, so that value is created. In recent years, the planting area of pineapples in continents of China is continuously enlarged, and the pineapples become one of economic prop industries in partial production areas.

The Tainong No. 17 pineapple has the characteristics of thin peel, light eyes, delicate meat, thin fiber and small core, the pulp is juicy and sweet, the fragrance is sufficient, the pulp is soft and glutinous, the sweetness is higher, the average sweetness reaches more than 16 degrees, the salt water soaking method of the common pineapple can be completely abandoned, no prickle is needed, the phenomenon of numb mouth can not occur when people eat the pineapple, the pineapple can be eaten like other fruits, the delicious pulp can be directly tasted after peeling, and the eating method of tearing the pineapple by hands can be used for quickly eating the pineapple. Therefore, the product is very popular with consumers in recent years. However, the content of vitamin C in the Tainong No. 17 pineapple is not as good as that in the Tainong No. 4, No. 11 and No. 16 of the same series, even the content of vitamin C is only 1/3 of the golden pineapple. Vitamin C content is an important standard for measuring fruit quality. Therefore, if the content of vitamin C in the Tainong No. 17 pineapple can be increased on the basis of not influencing the quality of the Tainong No. 17 pineapple, the method has important significance for improving the quality of the Tainong No. 17 pineapple and expanding the production.

In the prior art, there are few reports on the technology for improving the content of pineapple vitamin C. The invention patent of China is a special fertilizer for ornamental pineapple, and the publication number is CN 1884225A. The invention discloses a special fertilizer for ornamental pineapple, which is prepared from the following components in percentage by weight: 0-30% of calcium ammonium nitrate, 0-60% of potassium nitrate, 0-30% of monopotassium phosphate, 0-8.2% of ammonium dihydrogen phosphate, 2-47% of potassium sulfate, 4.3-23% of magnesium sulfate, 0-17% of urea, 0.422-0.823% of EDTA-FeI, 0.048-0.096% of zinc sulfate, 0.007-0.013% of copper sulfate, 0.013-0.024% of sodium molybdate and 0.055-0.110% of manganese sulfate. The fertilizer has the characteristics of strong solubility, no precipitation, no toxicity, strong plant growth, good flower development, bright color, long flowering period and the like, and can be applied to ornamental pineapple production fields and indoor maintenance. However, the ornamental pineapple planted by the fertilizer is not suitable for eating, and has long flowering phase, thus prolonging the production period; nor is there any mention of the effect on pulp vitamin C.

Disclosure of Invention

The invention aims to solve the technical problem of improving the content of vitamin C in Tainong 17 pineapple pulp. The preparation for improving the content of the vitamin C in the pulp of the pineapple, namely Tainong No. 17, is developed according to the rule of the nutrient requirement of the pineapple. The preparation has strong pertinence to Tainong No. 17 pineapples, the proportion of nitrogen, phosphorus and potassium is reasonable, and meanwhile, the preparation contains a proper amount of medium and trace elements and meets the requirements of Tainong No. 17 pineapples in different growth periods on various elements. The application method based on the preparation has the advantages that the application period is according to the growth cycle of Tainong 17, the application amount is matched with the nutritional requirement of the pineapples, and the application mode is simple and convenient. The method can obviously improve the fruiting rate and the vitamin C content of the Tainong No. 17 pineapple, and achieves the purposes of increasing yield, increasing income, improving quality and increasing efficiency; the used components are quick-acting nutrients, have good water solubility and are suitable for large-scale popularization and application.

The invention aims to provide a group of preparations for improving the content of vitamin C in the pulp of Tainong No. 17 pineapple.

The invention also aims to provide an application method of the preparation for improving the vitamin C content in the pineapple pulp No. 17 of Tainong.

In order to achieve the purpose, the invention provides the following technical scheme:

a group of preparations for increasing vitamin C content in pineapple pulp of Tainong No. 17 comprises a special preparation for vegetative growth phase and a special preparation for reproductive growth phase;

the special preparation for the vegetative growth period consists of the following components in parts by weight: 40-50 parts of inorganic compound fertilizer, 32-36 parts of urea, 10-16 parts of potassium sulfate fertilizer, 1.6-1.8 parts of EDTA iron, 1.2-1.4 parts of magnesium oxide, 0.9-1.1 parts of boric acid and 0.6-0.8 part of EDTA zinc;

the special preparation for the reproductive phase consists of the following components in parts by weight: 42-44 parts of potassium sulfate fertilizer, 32-35 parts of inorganic compound fertilizer, 16-18 parts of urea, 4-6 parts of EDTA calcium, 1-1.2 parts of magnesium oxide and 0.6-0.8 part of boric acid.

Preferably, in the preparation for increasing the vitamin C content in the pineapple pulp No. 17 of Tainong:

the special preparation for the vegetative growth period comprises, by weight, 46-48 parts of an inorganic compound fertilizer, 32-35 parts of urea, 15-16 parts of a potassium sulfate fertilizer, 1.6-1.8 parts of EDTA iron, 1.2-1.4 parts of magnesium oxide, 0.9-1.1 parts of boric acid and 0.6-0.8 parts of EDTA zinc;

the special preparation for the reproductive phase consists of the following components in parts by weight: 42-44 parts of potassium sulfate fertilizer, 32-34 parts of inorganic compound fertilizer, 16-18 parts of urea, 4-6 parts of EDTA calcium, 1-1.2 parts of magnesium oxide and 0.6-0.8 part of boric acid.

Wherein, the inorganic compound fertilizer in the special preparation for vegetative growth period and the special preparation for reproductive growth period is preferably 15-15-15 inorganic compound fertilizer (such as tricyclic 15-15-15 water-soluble compound fertilizer).

Wherein, preferably, the N mass percentage of the urea is 46-47%, and K in the potassium sulfate fertilizer₂The mass percentage of O is 52-53%.

Preferably, the mass percentage of N in the urea is 46.4%, and K in the potassium sulfate fertilizer₂The mass percentage of O is 52.0 percent.

An application method of a preparation for improving the vitamin C content in the pineapple pulp No. 17 of Tainong comprises the following steps:

(1) after the No. 17 Tainong pineapples are planted, 35-40 d, 65-70 d, 120-125 d, 165-170 d, 195-200 d, 230-235 d and 260-265 d are subjected to drip irrigation application after the special preparation for the vegetative growth period is dissolved by water, wherein the application amount of each drip irrigation is 12-31 kg/mu;

(2) and (3) after the pineapples of Tainong No. 17 are planted, dissolving the special preparation for the growth period by using water at 370-375 d and 455-460 d, and then performing drip irrigation application, wherein the application amount of each drip irrigation application is 24-26 kg/mu.

Preferably, the application amount of the special preparation in the vegetative growth period adopted in the first 3 times of the step (1) is 13-17 kg/mu, and the application amount of the special preparation in the later 4 times of the vegetative growth period is 18.5-20.5 kg/mu, 21-23 kg/mu, 26-28 kg/mu and 28.5-30.5 kg/mu in sequence.

Wherein, preferably, the water is irrigated once every 7 to 10 days in 7 to 8 months after the field planting of the Tainong No. 17 pineapple, and the irrigation quantity is 5 to 8m each time³Per mu.

Preferably, in the steps (1) and (2), before the preparation is applied by drip irrigation, clear water is used for irrigating for 10-12 minutes, then the preparation is applied, and finally clear water is used for irrigating for 12-15 minutes.

Wherein, preferably, in the step (1), before the special preparation for the vegetative growth phase is dissolved by water, the special preparation for the vegetative growth phase is sieved by a 40-mesh sieve.

Wherein, preferably, in the step (2), before the special preparation for the reproductive phase is dissolved in water, the special preparation for the reproductive phase is sieved by a 40-mesh sieve.

The invention has the following beneficial effects:

(1) the preparation has reasonable proportion of nitrogen, phosphorus and potassium, contains moderate and trace elements, and meets the requirements of Tainong No. 17 pineapples at different growth and development stages on various elements.

(2) All the components are quick-acting nutrients with good water solubility, and the drippers cannot be blocked in the drip irrigation process, so the drip irrigation device is suitable for large-scale popularization and application.

(3) The application method based on the preparation has reasonable application period, the application amount is matched with the requirement of crops, and the application mode adopts a drip irrigation mode, so that the application method is simple and convenient.

(4) The preparation is matched with an application method to improve the yield and the quality of the Tainong No. 17 pineapple, remarkably improve the content of vitamin C and achieve the purposes of increasing yield and income, improving quality and increasing efficiency.

Detailed Description

The invention is further illustrated by the following description and specific examples, which are not intended to limit the invention in any way. The reagents, methods and apparatus employed in the present invention are conventional in the art, unless otherwise indicated. Unless otherwise indicated, reagents and materials used in the following examples are commercially available.

Example 1

The group of preparations for increasing the vitamin C content in the pineapple pulp of tainong No. 17 in the embodiment comprises a special preparation for a vegetative growth phase and a special preparation for a reproductive growth phase, and the specific components are shown in tables 1 and 2:

TABLE 1 ingredient table (parts) of special preparation for vegetative growth period

Preparation	A1	B1	C1	D1	E1	F1
							Tricyclic 15-15-15 water soluble compound fertilizer	46	47	48	40	50	50
Urea	34	33	32	33	36	33
							Potassium sulfate fertilizer	15	15	15	15	15	10
EDTA iron	1.7	1.6	1.6	1.6	1.6	1.6
							Magnesium oxide	1.3	1.4	1.4	1.4	1.4	1.4
Boric acid	1	1.1	1.1	1	1.1	1.1
							EDTA zinc	0.6	0.8	0.7	0.7	0.7	0.7

TABLE 2 ingredient table (parts) of preparation specially used in reproductive period

Preparation	A2	B2	C2	D2	E2	F2
							Tricyclic 15-15-15 water soluble compound fertilizer	33	32	33	33	35	35
Urea	18	18	17	17	17	17
							Potassium sulfate fertilizer	42	43	43	43	43	43
EDTA calcium salt	5	5	5	5	5	5
							Magnesium oxide	1	1	1	1	1	1
Boric acid	0.7	0.7	0.7	0.7	0.7	0.7

Note: wherein the mass percentage of N in the urea is 46.4 percent, and K in the potassium sulfate fertilizer₂The mass percentage of O is 52.0 percent, and the balance is pure chemical raw materials.

The preparation method comprises the following steps: respectively crushing the raw materials of the components, sieving the crushed raw materials with a 40-mesh sieve, and uniformly mixing the raw materials according to corresponding parts by weight to respectively obtain a special preparation for a vegetative growth phase and a special preparation for a reproductive growth phase.

Example 2

The field application test was performed using the preparation for increasing the content of vitamin C in pineapple pulp of tainong No. 17 obtained in example 1 (special preparations for long-term nutrition preservation a1 and D1, and special preparations for reproductive growth a2 and D2).

Test time: 11 months in 2017-3 months in 2019

Test site: wanning city of Hainan province Longzhuanshui Hippo village (Dongding 110.47 degree, northern latitude 19.06 degree).

Test soil: the test soil type is yellow brick red soil developed by granite.

The total area of the test plots is 3 mu, and the Tainong No. 17 pineapples are planted, wherein 1 mu of the test plots adopts a special preparation A1 in the vegetative growth period and a special preparation A2 in the reproductive growth period (set as test example 1);

in addition, 1 mu of test plot adopts a special preparation D1 for vegetative growth phase and a special preparation D2 for reproductive growth phase (set as test example 2);

finally, 1 mu of test plot is treated by adopting optimized fertilization of farmers (set as comparative example 1).

The application method of the formulation specific to the vegetative growth phase and the formulation specific to the reproductive growth phase in test examples 1 and 2 comprises the following steps:

the special preparation for vegetative growth is applied to each mu of plants 7 times in the vegetative growth period in combination with drip irrigation, and the special preparation for reproductive growth is applied to each mu of plants 2 times in the reproductive growth period in combination with drip irrigation, wherein the specific application time and application amount are shown in the table 3.

Table 3 application protocol of the formulation for increasing the vitamin C content in pineapple pulp No. 17 of Tainong

The specific operation of applying is: dissolving the preparation in water to prepare a liquid state for later use, irrigating the test field with clear water for 10 minutes, applying the liquid preparation for 25-30 minutes, and finally irrigating with clear water for 15 minutes. .

In the comparative example 1, the Tainong No. 17 pineapple adopts specific operations of optimized fertilization treatment by farmers as follows: the fertilizing amount per mu is 69.6kg of N and 32.1kg of P32; k: 81.9 kg. The fertilizer is applied for four times in a base fertilizer, a slow growth period, a rapid growth period and a fruit swelling period respectively, and the specific fertilization conditions of farmers are as follows.

Base fertilizer: 22 kg/mu of lime, 12 kg/mu of urea, 15 kg/mu of potassium chloride, 30 kg/mu of magnesium sulfate and 64 kg/mu of Norwegian 15-15-15 compound fertilizer.

And (3) slow growth period: 12 kg/mu of urea, 3 kg/mu of potassium chloride and 11 kg/mu of norway 15-15-15 compound fertilizer.

And (3) rapid growth period: 48 kg/mu of urea, 38 kg/mu of potassium chloride and 107 kg/mu of Norwegian 15-15-15 compound fertilizer.

And (3) fruit swelling period: 8 kg/mu of urea, 23 kg/mu of potassium sulfate and 11 kg/mu of 15-15-15 Norway compound fertilizer.

As a result: the results are shown in table 4, compared with the optimized fertilization by farmers, the Tainong No. 17 pineapple treated by the preparation of the invention has the advantages that the commodity fruit rate and the weight average of single fruit are increased, the quality of the Tainong No. 17 pineapple is improved, the vitamin C content of pulp is increased, the sugar degree of the fruit is increased, and the taste and flavor are better.

TABLE 4 drip irrigation effect of Tibet pesticide No. 17 pineapple fruit pulp vitamin C content increasing preparation

Note: the commercial fruits with the single fruit weight of more than 0.65kg are planted at the density of 4300 plants/mu.

Example 3

Test time: 11 months in 2017-3 months in 2019.

Site of experiment 2: ledong county peak town ten thousand-clock farm (east longitude 108.46 °, northern latitude 18.39 °).

Test soil: the test soil type was dry red soil.

The total area of the test plots is 3 mu, and the Tainong No. 17 pineapples are planted.

Wherein 1 mu of the composition adopts a special preparation B1 for vegetative growth phase and a special preparation B2 for reproductive growth phase (set as experimental example 3);

in addition, 1 mu of test plot adopts a special preparation E1 for vegetative growth period and a special preparation E2 for reproductive growth period (set as test example 4);

finally, the test plot of 1 mu was treated by the optimized fertilization of the farmers (set as control 2).

The application method of the formulation specific to the vegetative growth phase and the formulation specific to the reproductive growth phase in test examples 3 and 4 comprises the following steps:

the special preparation for vegetative growth is applied to each mu of plants 7 times in the vegetative growth period in combination with drip irrigation, and the special preparation for reproductive growth is applied to each mu of plants 2 times in the reproductive growth period in combination with drip irrigation, wherein the specific application time and application amount are shown in the table 5.

Table 5 application protocol of formulation for increasing vitamin C content in pineapple pulp No. 17 of Tainong

The specific operation of applying is: dissolving the preparation in water to prepare a liquid state for later use, irrigating with clear water for 10 minutes, then irrigating with the preparation for 25-30 minutes, and finally irrigating with clear water for 15 minutes.

In the comparative example 2, the Tainong No. 17 pineapple adopts the concrete steps of optimized fertilization treatment by farmers: the fertilizing amount per mu is 69.6kg of N and 32.1kg of P32; k: 81.9 kg. The fertilizer is applied for four times in a base fertilizer, a slow growth period, a rapid growth period and a fruit swelling period respectively, and the specific fertilization conditions of farmers are as follows.

Base fertilizer: 22 kg/mu of lime, 12 kg/mu of urea, 15 kg/mu of potassium chloride, 30 kg/mu of magnesium sulfate and 64 kg/mu of Norwegian 15-15-15 compound fertilizer.

And (3) slow growth period: 12 kg/mu of urea, 3 kg/mu of potassium chloride and 11 kg/mu of norway 15-15-15 compound fertilizer.

And (3) rapid growth period: 48 kg/mu of urea, 38 kg/mu of potassium chloride and 107 kg/mu of Norwegian 15-15-15 compound fertilizer.

And (3) fruit swelling period: 8 kg/mu of urea, 23 kg/mu of potassium sulfate and 11 kg/mu of 15-15-15 Norway compound fertilizer.

As a result: the results are shown in table 6, compared with the optimized fertilization by farmers, the Tainong No. 17 pineapple treated by the preparation of the invention has the advantages that the commodity fruit rate and the weight average of single fruit are increased, the quality of the Tainong No. 17 pineapple is improved, the vitamin C content of pulp is increased, the sugar degree of the fruit is increased, and the taste and flavor are better.

TABLE 6 drip irrigation effect of Tibet pesticide No. 17 pineapple fruit pulp vitamin C content increasing preparation

Note: the commercial fruits with the single fruit weight of more than 0.65kg are planted at the density of 4200 plants/mu.

Example 4

Test time: 11 months in 2017-3 months in 2019

Test site: zhongzhen Roudoucun (east longitude 110.50 degree, northern latitude 19.10 degree) in Jones city.

Test soil: the test soil type is yellow brick red soil developed by granite.

The total area of the test plots is 9 mu, and the Tainong No. 17 pineapples are planted.

Wherein 4 acres of the composition adopted the preparation C1 specially used in the vegetative growth phase and the preparation C2 specially used in the reproductive growth phase (set as test example 5) of example 1;

in addition, 4 acres of the composition were prepared using the growth phase formulation F1 and the reproductive phase formulation F2 (test example 6) of example 1;

finally, the test plot of 1 mu was used as control 3, and the optimum fertilization treatment by the farmers was adopted (set as control 3).

The application method of the preparation for increasing the vitamin C in the pineapple pulp No. 17 of Tainong in the experimental example 3 comprises the following steps:

the special preparation for vegetative growth is applied to each mu of plants 7 times in the vegetative growth period in combination with drip irrigation, and the special preparation for reproductive growth is applied to each mu of plants 2 times in the reproductive growth period in combination with drip irrigation, wherein the specific application time and application amount are shown in the table 7.

Table 7 application protocol of the formulation for increasing the vitamin C content in pineapple pulp No. 17 of Tainong

The applicator is operated as follows: dissolving the preparation in water to prepare a liquid state for later use, irrigating with clear water for 10 minutes, then irrigating with the liquid preparation for 25-30 minutes, and finally irrigating with clear water for 15 minutes.

In comparative example 3, the Tainong No. 17 pineapple is treated by adopting the specific steps of optimized fertilization by farmers: the fertilizing amount per mu is 69.6kg of N and 32.1kg of P32; k: 81.9 kg. The fertilizer is applied for four times in a base fertilizer, a slow growth period, a rapid growth period and a fruit swelling period respectively, and the specific fertilization conditions of the optimized fertilizer application of farmers are as follows.

Base fertilizer: 22 kg/mu of lime, 12 kg/mu of urea, 15 kg/mu of potassium chloride, 30 kg/mu of magnesium sulfate and 64 kg/mu of Norwegian 15-15-15 compound fertilizer.

And (3) slow growth period: 12 kg/mu of urea, 3 kg/mu of potassium chloride and 11 kg/mu of norway 15-15-15 compound fertilizer.

And (3) rapid growth period: 48 kg/mu of urea, 38 kg/mu of potassium chloride and 107 kg/mu of Norwegian 15-15-15 compound fertilizer.

As a result: the results are shown in table 8, compared with the optimized fertilization of farmers, the Tainong No. 17 pineapple treated by the preparation of the invention has the advantages of increasing the commodity fruit rate and the weight average of single fruit, improving the quality of the Tainong No. 17 pineapple, increasing the vitamin C content of pulp, increasing the sugar degree of the fruit and having better taste and flavor.

TABLE 8 drip irrigation effect of Tibet pesticide No. 17 pineapple fruit pulp vitamin C content increasing preparation

Note: the commercial fruits with the weight of each fruit more than 0.65kg are planted at the density of 4050 plants/mu.

The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, and simplifications are intended to be included in the scope of the present invention.