阅读说明：本技术 一种测定水稻叶面积率的方法 (Method for measuring area rate of rice leaves ) 是由 冯跃华 牟桂婷 黄佑岗 于 2017-03-08 设计创作，主要内容包括：本发明公开了一种测定水稻叶面积率的方法,能够根据单穴高效叶面积、单穴低效叶面积、单穴无效叶面积、总绿叶干重、单穴绿叶干重,计算出水稻高效、低效和无效叶面积率。本发明和现有技术相比,不仅快速地计算出水稻高效、低效和无效叶面积率,使用该方法能够节约成本、提高工效,为进一步探讨水稻群体指标打下了良好基础。(The invention discloses a method for measuring the area rate of rice leaves, which can calculate the area rate of high-efficiency, low-efficiency and ineffective leaves of rice according to the area of high-efficiency leaves in a single hole, the area of low-efficiency leaves in a single hole, the area of ineffective leaves in a single hole, the dry weight of total green leaves and the dry weight of green leaves in a single hole. Compared with the prior art, the method not only can rapidly calculate the high-efficiency, low-efficiency and invalid leaf area rate of the rice, but also can save the cost and improve the work efficiency by using the method, thereby laying a good foundation for further discussing the rice population indexes.)

1. A method for determining the leaf area ratio of rice, which comprises the following steps:

the method comprises the following steps: sampling 4 holes in a rice planting area according to the average tiller number of the rice;

step two: selecting the most representative 1 hole from the sampled 4-hole rice according to the average tiller number, then measuring the areas of the high-efficiency, low-efficiency and ineffective leaves, and measuring the dry weight of the green leaves in the single hole;

step three: determining the dry weight of green leaves in another 3 holes;

step four: synthesizing the dry weight of the green leaves in the 4 holes, and calculating the total dry weight of the green leaves according to the land area occupied by the dry weight of the green leaves;

step five: the total high efficiency, total low efficiency and total invalid leaf area are calculated according to the following formula:

2. the method for determining leaf area ratio of rice according to claim 1, wherein: in the first step, the average number of tiller of the rice is determined by a fixed point survey method.

3. The method for determining leaf area ratio of rice according to claim 2, wherein: the fixed-point investigation method is that the 1 st stump is determined at the 4 rows and the 4 columns of the rice planting area, the 10 stumps are continuously determined, the tiller number of the 10 stumps is investigated, and the average tiller number is obtained by taking the average value of the tiller number.

4. The method for determining leaf area ratio of rice according to claim 1, wherein: the tiller number in the first step is the sum of the main tiller number and the tiller number of the rice.

5. The method for determining leaf area ratio of rice according to claim 1, wherein: in the first step, the rice planting area is sampled into 4 holes, and the number of tillers in all the 4 holes is the average number of tillers.

6. The method for determining leaf area ratio of rice according to claim 1, wherein: in the fourth step, the total dry weight of the green leaves is calculated by dividing the dry weight of the green leaves in 4 holes by the occupied land area and then unitizingIs kg/hm²。

7. The method for determining leaf area ratio of rice according to claim 1, wherein: the high-efficiency leaf area is the leaf area of 3 leaves at the upper part of the rice, the low-efficiency leaf area is the leaf area of other leaves except the 3 leaves at the upper part of the effective tiller, and the ineffective leaf area is the leaf area of the leaves at the ineffective tiller.

8. The method for determining leaf area ratio of rice according to claim 1, wherein: the high efficiency, low efficiency, invalid leaf area ratio is calculated according to the following formula:

Technical Field

The invention relates to the technical field of rice population quality index identification, in particular to a method for determining the leaf area rate of rice.

Background

At present, the high efficiency, low efficiency and invalid leaf area rate of rice are important indexes for the research of rice population quality indexes. At present, many researchers feel that the measurement and calculation of the index are inconvenient, mainly because the high-efficiency leaf area is the leaf area of three leaves at the upper part of rice, the low-efficiency leaf area is the leaf area of other leaves except the three leaves at the upper part of an effective tiller, the invalid leaf area is the leaf area of the leaves on an invalid tiller, the measurement and calculation are troublesome, and all the existing measurement methods are not perfect.

Disclosure of Invention

In view of the above problems, the present invention provides a method for determining the leaf area ratio of rice, which has the advantages of low cost, short period and high precision, and can rapidly determine the high leaf area ratio, the low leaf area ratio and the ineffective leaf area ratio of rice.

The invention adopts the following technical scheme: the invention provides a method for measuring the leaf area rate of rice, which is characterized by comprising the following steps:

the method comprises the following steps: sampling 4 holes in a rice planting area according to the average tiller number of the rice;

step two: selecting the most representative 1 hole from the sampled 4-hole rice according to the average tiller number, then measuring the areas of the high-efficiency, low-efficiency and ineffective leaves, and measuring the dry weight of the green leaves in the single hole;

step three: determining the dry weight of green leaves in another 3 holes;

step four: synthesizing the dry weight of the green leaves in the 4 holes, and calculating the total dry weight of the green leaves according to the land area occupied by the dry weight of the green leaves;

step five: the total high efficiency, total low efficiency and total invalid leaf area are calculated according to the following formula:

further, in the first step, the average number of tiller of rice is determined by a site-specific survey.

Furthermore, the site-specific survey method is to determine the 1 st root and continuously 10 roots at 4 rows and 4 columns in the rice planting area, survey the tiller number of the 10 roots, and take the average value to obtain the average tiller number.

Further, the tiller number in the first step is the sum of the main tiller number and the tiller number of the rice.

Further, in the first step, the rice planting region is sampled into 4 holes, and the number of tillers in all the 4 holes is the average number of tillers.

Further, in the fourth step, the total dry weight of green leaves is calculated by dividing the dry weight of green leaves in 4 holes by the land area occupied, and then the unit is kg/hm²。

Further, the high-efficiency leaf area is the leaf area of the upper 3 leaves of the rice, the low-efficiency leaf area is the leaf area of the leaves other than the upper 3 leaves of the effective tiller, and the ineffective leaf area is the leaf area of the leaves of the ineffective tiller.

Further, the high efficiency, low efficiency, and ineffective leaf area ratio is calculated according to the following formula:

compared with the prior art, the invention has the beneficial technical effects that:

according to the method, the high-efficiency, low-efficiency and ineffective leaf area rate of the rice can be calculated according to the single-hole high-efficiency leaf area, the single-hole low-efficiency leaf area, the single-hole ineffective leaf area, the total green leaf dry weight and the single-hole green leaf dry weight.

Detailed Description

In order that those skilled in the art will better understand the technical solutions of the present invention, the present invention will be further described in detail with reference to the following embodiments.

The invention discloses a method for measuring the leaf area rate of rice, which comprises the following steps:

the method comprises the following steps: sampling 4 holes in a rice planting area according to the average tiller number of the rice;

step two: selecting the most representative 1 hole from the sampled 4-hole rice according to the average tiller number, then measuring the areas of the high-efficiency, low-efficiency and ineffective leaves, and measuring the dry weight of the green leaves in the single hole;

step three: determining the dry weight of green leaves in another 3 holes;

step four: and (4) integrating the dry weight of the green leaves in the 4 holes, and calculating the total dry weight of the green leaves according to the land area occupied by the dry weight of the green leaves.

Step five: the total high efficiency, total low efficiency and total invalid leaf area are calculated according to the following formula:

in the first step, the average number of tiller of rice is determined by fixed-point survey. Specifically, the site-specific survey method is a method in which the 1 st stump is determined at 4 rows and 4 columns in a rice planting region, and 10 stumps are continued to investigate the number of tiller in the 10 stumps, and the average value is taken to obtain the average tiller number.

The tiller number in the first step is the sum of the main stem number and the tiller number of the rice.

In the first step, 4 holes are sampled in the rice planting area, which means that the tiller number of each 4 holes is the average tiller number.

In the fourth step, the calculation method of the total dry weight of the green leaves is that the dry weight of the green leaves in 4 holes is divided by the occupied land area, and then the unit is kg/hm²。

In this example, the high-efficiency leaf area is the leaf area of the upper 3 leaves of rice, the low-efficiency leaf area is the leaf area of the leaves other than the upper 3 leaves of the effective tiller, and the ineffective leaf area is the leaf area of the leaves of the ineffective tiller.

The embodiment also discloses a calculation formula of the high-efficiency, low-efficiency and invalid leaf area ratio, and specifically comprises the following steps:

firstly, investigating the number of rice stem tillers in a rice planting area to obtain the average number of the stem tillers; then, sampling 4 holes in the rice planting area according to the average tiller number of the rice; the most representative 1 hole of 4 holes of rice is used to determine the high-efficiency, low-efficiency and ineffective leaf area (cm)²Hole/hole), and the dry weight of green leaves per hole (g/hole) was measured; determining the dry weight of green leaves in another 3 holes; the dry weight of the green leaves in 4 holes is synthesized, and the total dry weight (kg/hm) of the green leaves is calculated according to the land area occupied by the dry weight²) (ii) a Efficient, inefficient, and ineffective leaf area calculation. The total high-efficiency leaf area is equal to the area of the single-hole high-efficiency leaf multiplied by the dry weight of the total green leaf divided by the dry weight of the single-hole green leaf, the total low-efficiency leaf area is equal to the area of the single-hole low-efficiency leaf multiplied by the dry weight of the total green leaf divided by the dry weight of the single-hole green leaf, the total ineffective leaf area is equal to the area of the single-hole ineffective leaf multiplied by the dry weight of the total green leaf divided by the dry weight of the single-hole green leaf, and the high-efficiency leaf area is equal to the area of the single-hole ineffective leaf multiplied by the dry weight of the total green leaf divided by the dry weight of the single-hole green leafThe area rate refers to the proportion of the high-efficiency leaf area to the leaf area of the group, the low-efficiency leaf area rate refers to the proportion of the low-efficiency leaf area to the leaf area of the group, the ineffective leaf area rate refers to the proportion of the ineffective leaf area to the leaf area of the group, the ineffective leaf area rate is high, and the grain-leaf ratio of the group can be reduced.

The method steps of the invention can obtain the best scheme through a large amount of experimental data and effective research, analysis, summary and induction of the inventor, and the leaf area calculation formula can be derived through strict mathematical logic and creative labor. The method can calculate the high efficiency, low efficiency and invalid leaf area rate of the rice according to the single-hole high-efficiency leaf area, the single-hole low-efficiency leaf area, the single-hole invalid leaf area, the total green leaf dry weight and the single-hole green leaf dry weight.

The above-described embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solutions of the present invention may be made by those skilled in the art without departing from the spirit of the present invention, which is defined by the claims.