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Method for evaluating lodging resistance of corn stalks

A corn stalk and anti-lodging technology, applied in the direction of measuring devices, instruments, scientific instruments, etc., can solve the problems of increased stalk inclination angle, too many equipment components, and incomparability, and achieve simple equipment, broad ideas and technology The effect of means and convenient operation

Inactive Publication Date: 2016-06-22
MAIZE RES INST SHANDONG ACAD OF AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method has the following defects: (1) The evaluation of stem lodging resistance can be expressed by the force when the stem breaks, or the force at a fixed angle, or the angle under a fixed force; Stem inclination angle increases with force
However, the invention measures the force without determining the angle of inclination, resulting in incomparability between different materials
(2) There are too many equipment components, and the friction between the trapezoidal slider, chute and other components leads to an increase in the test error, which cannot be ignored

Method used

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  • Method for evaluating lodging resistance of corn stalks
  • Method for evaluating lodging resistance of corn stalks
  • Method for evaluating lodging resistance of corn stalks

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] A method for evaluating lodging resistance of corn stalks, the specific steps comprising:

[0041] A, select 12 kinds of materials, including material 1 to material 12, each material species name is shown in Table 1, and every kind of material includes 5 strains of corn, carry out step (1), step (2) to every strain of corn:

[0042] (1) Use a portable microcomputer stalk strength measuring instrument to measure the puncture resistance of the stem bark of the stalk below the ear of corn. The specific steps include:

[0043] ①Insert the steel needle into the first internode under the ear of corn, figure 1 Middle internode AF, measured downwards from the middle and upper part of the internode, the insertion direction is perpendicular to the plane formed by the first ear and the stalk;

[0044] ② After measuring 3 times, take the average value of the measurement results as the stem bark puncture strength of the corn plant;

[0045] (2) Determination of the flexibility of ...

Embodiment 2

[0058] A method for evaluating lodging resistance of corn stalks, the specific steps comprising:

[0059] A, select 12 kinds of materials, including material 1 to material 12, each material variety name is shown in Table 2, and every kind of material includes 5 strains of corn, carry out step (1), step (2) to every strain of corn:

[0060] (1) Use a portable microcomputer stalk strength measuring instrument to measure the puncture resistance of the stem bark of the stalk below the ear of corn. The specific steps include:

[0061] ①Insert the steel needle into the first internode below the ear of corn, measure downwards from the middle and upper part of the internode in sequence, and the insertion direction is perpendicular to the plane formed by the first ear and the stalk;

[0062] ② After measuring 3 times, take the average value of the measurement results as the stem bark puncture strength of the corn plant;

[0063] (2) Measure the flexibility of the corn stalk above the ...

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Abstract

The invention relates to a method for evaluating lodging resistance of corn stalks. Bark puncture strength between nodes below stalk spike nodes is determined, the inclination angle between nodes above spike nodes is determined, and the lodging resistance of the stalks is objectively and comprehensively evaluated in combination with two aspects of bark puncture hardness and flexibility. The actual condition of field operation is identified according to corn stalk lodging resistance, defects of an original single evaluation method for stalk lodging resistance are overcome, the hardness factor of stalks below the spike nodes is considered, the toughness factor of stalks above the spike nodes is combined, the stalk lodging resistance can be accurately and comprehensively evaluated, and the obtained result can be used in corn breeding and production for reference.

Description

technical field [0001] The invention relates to a method for evaluating the lodging resistance of corn stalks, belonging to the technical field of agricultural hardness detection. Background technique [0002] With the introduction and practice of the concept of high-density breeding, the problem of lodging has become increasingly prominent in the process of crop breeding and production. Corn lodging is light and the yield is reduced by 5-10%, and the severe one is reduced by 30-50%, or even completely lost. Breeders regard improving stem lodging resistance as one of the three main goals of breeding (high yield, lodging resistance, and disease resistance), and this trait has also been listed as an important assessment index for national and provincial trials of new corn varieties. Whether crop stems lodging is affected by two forces, one is external forces such as wind and rain, and the other is the lodging resistance of the stem itself. In the case of the same external fo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/00
CPCG01N33/0098
Inventor 穆春华刘霞孙验玲鲁守平赵苏娴李文才张慧刘治先杨君成孟昭东
Owner MAIZE RES INST SHANDONG ACAD OF AGRI SCI
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