阅读说明：本技术 一种水培生菜专用营养液及其配制方法 (Special nutrient solution for hydroponic lettuce and preparation method thereof ) 是由 李蔚 雷喜红 李新旭 李红岺 赵灵芝 王艳芳 冯颖 牛曼丽 王冰华 孙丹 于 2019-10-28 设计创作，主要内容包括：本发明涉及水培生菜营养液技术领域,尤其涉及一种水培生菜专用营养液及其配制方法；所述营养液包括A液和B液,所述A液包含以下浓度的成分：硝酸铵钙538～543mg/L,硝酸钾480～485mg/L；所述B液包含以下浓度的成分：硝酸钾323～328mg/L,七水硫酸镁490～495mg/L,磷酸二氢钾178～183mg/L,乙二胺四乙酸铁钠18～23mg/L,一水硫酸锰2.0～2.2mg/L,七水硫酸锌0.2～0.3mg/L,五水硫酸铜0.07～0.09mg/L,钼酸钠0.01～0.03mg/L,硼酸2.8～2.9mg/L。本发明所述的营养液的配制方法,简单易操作。本发明提供的营养液可以提高生菜品质,促进VC含量,降低亚硝酸盐含量,并能够降低大量元素肥料的施用量,促进农业节水、节肥发展趋势。(The invention relates to the technical field of hydroponic lettuce nutrient solution, in particular to special nutrient solution for hydroponic lettuce and a preparation method thereof; the nutrient solution comprises a solution A and a solution B, wherein the solution A comprises the following components in concentration: 538-543 mg/L of calcium ammonium nitrate and 480-485 mg/L of potassium nitrate; the liquid B comprises the following components in concentration: 323-328 mg/L potassium nitrate, 490-495 mg/L magnesium sulfate heptahydrate, 178-183 mg/L potassium dihydrogen phosphate, 18-23 mg/L sodium ferric ethylenediamine tetraacetate, 2.0-2.2 mg/L manganese sulfate monohydrate, 0.2-0.3 mg/L zinc sulfate heptahydrate, 0.07-0.09 mg/L copper sulfate pentahydrate, 0.01-0.03 mg/L sodium molybdate and 2.8-2.9 mg/L boric acid. The preparation method of the nutrient solution is simple and easy to operate. The nutrient solution provided by the invention can improve the quality of lettuce, promote the VC content, reduce the nitrite content, reduce the application amount of macroelement fertilizer and promote the development trend of agricultural water and fertilizer conservation.)

1. A special nutrient solution for hydroponic lettuce is characterized by comprising a solution A and a solution B; the liquid A comprises the following components in concentration: 538-543 mg/L of calcium ammonium nitrate and 480-485 mg/L of potassium nitrate; the liquid B comprises the following components in concentration: 323-328 mg/L potassium nitrate, 490-495 mg/L magnesium sulfate heptahydrate, 178-183 mg/L potassium dihydrogen phosphate, 18-23 mg/L sodium ferric ethylenediamine tetraacetate, 2.0-2.2 mg/L manganese sulfate monohydrate, 0.2-0.3 mg/L zinc sulfate heptahydrate, 0.07-0.09 mg/L copper sulfate pentahydrate, 0.01-0.03 mg/L sodium molybdate and 2.8-2.9 mg/L boric acid.

2. The special nutrient solution for hydroponic lettuce according to claim 1, wherein the nutrient solution comprises the solution A and the solution B in equal amount, and the EC value of the nutrient solution is 1.8 ms/cm.

3. The special nutrient solution for hydroponic lettuce according to any one of claims 1 or 2, wherein the pH value of the nutrient solution is 5.5-6.0.

4. The special nutrient solution for hydroponic lettuce according to any one of claims 1 to 3, wherein sodium hydroxide or dilute phosphoric acid is used as a pH value regulator.

5. The special nutrient solution for hydroponic lettuce according to claim 1, wherein the solution A consists of the following components in concentration: 540mg/L of calcium ammonium nitrate and 483mg/L of potassium nitrate; the solution B comprises the following components in concentration: 325mg/L of potassium nitrate, 493mg/L of magnesium sulfate heptahydrate, 180mg/L of monopotassium phosphate, 20mg/L of sodium iron ethylenediaminetetraacetate, 2.13mg/L of manganese sulfate monohydrate, 0.22mg/L of zinc sulfate heptahydrate, 0.08mg/L of copper sulfate pentahydrate, 0.02mg/L of sodium molybdate and 2.86mg/L of boric acid.

6. The preparation method of the special nutrient solution for hydroponic lettuce, which is described in any one of claims 1 to 5, is characterized by comprising the following steps:

(1) weighing calcium ammonium nitrate and potassium nitrate by taking water as a solvent to prepare solution A; the concentration of each component in the solution A is 100 times of the final concentration;

(2) taking water as a solvent, weighing potassium nitrate, magnesium sulfate heptahydrate, potassium dihydrogen phosphate, ethylene diamine tetraacetic acid sodium iron, manganese sulfate monohydrate, zinc sulfate heptahydrate, copper sulfate pentahydrate, sodium molybdate and boric acid to prepare solution B; the concentration of each component in the solution B is 100 times of the final concentration;

(3) measuring equal amounts of solution A and solution B, and adding water until the EC value of the nutrient solution is 1.8ms/cm to obtain the nutrient solution.

7. The preparation method of claim 6, further comprising the step of adjusting the pH of the nutrient solution stock solution to 5.5-6.0.

Technical Field

The invention relates to the technical field of hydroponic lettuce nutrient solutions, in particular to a special nutrient solution for hydroponic lettuce and a preparation method thereof.

Background

The water culture lettuce has high quality, clean, water-saving and fertilizer-saving, and has entered the industrial production stage in recent years. How to design a reasonable nutrient solution formula in production to achieve the aims of high quality and high yield is the core problem of lettuce soilless culture. The proper formula not only influences the growth and development of crops and the yield formation, but also relates to an economic fertilizer, reduces the production cost and improves the economic benefit.

Most nutrient solutions used in the prior production are general formulas aiming at common vegetables on the market, have no pertinence, have low yield per unit area in the using process, and generate high nitrite content, thereby influencing the yield and quality of lettuce. In addition, a large amount of element fertilizers in the nutrient solution are used in the growth process of the lettuce, so that the production cost is increased.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide the special nutrient solution for water culture lettuce. The invention selects calcium ammonium nitrate as the source of the nitrogenous fertilizer, and the potassium nitrate, magnesium sulfate heptahydrate, potassium dihydrogen phosphate, ethylene diamine tetraacetic acid sodium iron, manganese sulfate monohydrate, zinc sulfate heptahydrate, copper sulfate pentahydrate, sodium molybdate and boric acid are matched, so that not only can nitrate nitrogen be provided, but also a small amount of ammonium nitrogen can be provided, the utilization efficiency and the yield of nitrogen can be obviously increased, the yield of the water culture lettuce can be increased, and the nitrate content can be obviously reduced.

The invention aims to provide a special nutrient solution for water culture lettuce, which comprises a solution A and a solution B; the liquid A comprises the following components in concentration: 538-543 mg/L of calcium ammonium nitrate and 480-485 mg/L of potassium nitrate; the liquid B comprises the following components in concentration: 323-328 mg/L potassium nitrate, 490-495 mg/L magnesium sulfate heptahydrate, 178-183 mg/L potassium dihydrogen phosphate, 18-23 mg/L sodium ferric ethylenediamine tetraacetate, 2.0-2.2 mg/L manganese sulfate monohydrate, 0.2-0.3 mg/L zinc sulfate heptahydrate, 0.07-0.09 mg/L copper sulfate pentahydrate, 0.01-0.03 mg/L sodium molybdate and 2.8-2.9 mg/L boric acid.

Preferably, the nutrient solution comprises equal amounts of the solution A and the solution B, and the EC value of the nutrient solution is 1.8 ms/cm.

Preferably, the pH value of the nutrient solution is 5.5-6.0.

Preferably, sodium hydroxide or dilute phosphoric acid is used as the pH regulator.

In a preferred embodiment of the present invention, the solution a is composed of the following components in concentration: 540mg/L of calcium ammonium nitrate and 483mg/L of potassium nitrate; the solution B comprises the following components in concentration: 325mg/L of potassium nitrate, 493mg/L of magnesium sulfate heptahydrate, 180mg/L of monopotassium phosphate, 20mg/L of sodium iron ethylenediaminetetraacetate, 2.13mg/L of manganese sulfate monohydrate, 0.22mg/L of zinc sulfate heptahydrate, 0.08mg/L of copper sulfate pentahydrate, 0.02mg/L of sodium molybdate and 2.86mg/L of boric acid.

The second object of the present invention is to provide a method for preparing any one of the above hydroponic lettuce culture solutions, comprising the steps of:

(1) weighing calcium ammonium nitrate and potassium nitrate by taking water as a solvent to prepare solution A; the concentration of each component in the solution A is 100 times of the final concentration;

(2) taking water as a solvent, weighing potassium nitrate, magnesium sulfate heptahydrate, potassium dihydrogen phosphate, ethylene diamine tetraacetic acid sodium iron, manganese sulfate monohydrate, zinc sulfate heptahydrate, copper sulfate pentahydrate, sodium molybdate and boric acid to prepare solution B; the concentration of each component in the solution B is 100 times of the final concentration;

(3) measuring equal amounts of solution A and solution B, and adding water until the EC value of the nutrient solution is 1.8ms/cm to obtain the nutrient solution.

Preferably, the method further comprises the step of adjusting the pH of the nutrient solution stock solution to 5.5-6.0.

The invention has the beneficial effects that: the nutrient solution provided by the invention can increase the yield of lettuce, improve the quality of lettuce, promote the VC content, reduce the nitrite content, reduce the application amount of macroelement fertilizer and promote the development trend of agricultural water and fertilizer conservation. The nutrient solution can be used for testing the seeds of Italian lettuce, butter lettuce, scattered lettuce and oak lettuce, and can ensure the normal growth of plants.

Detailed Description

The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.