Field screening method for density-tolerant high-yield maize strain suitable for mechanical kernel reaping

A screening method, corn technology, applied in the direction of soil preparation method, fertilization method, botanical equipment and methods, etc., can solve the problems of low production efficiency and mechanization degree, weak resistance to seasonal drought, low yield of corn sparse planting, etc., to achieve The results of the test data are scientifically accurate, ensure the authenticity, and improve the effect of scientificity and effectiveness

Active Publication Date: 2018-09-28
HONGHE COLLEGE
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Problems solved by technology

At present, the prominent factors restricting the production of summer maize in Yunnan mainly include the variety of maize varieties, low seed vigor, weak ability to resist seasonal drought at the seedling stage, poor seedling emergence in the field, low yield of maize sparsely planted and poor efficiency, high production cost, low production efficiency and low degree of mechanization, Therefore, it is urgent to create a new way of breeding and screening new varieties of summer maize in Yunnan that are resistant to density, high yield and suitable for mechanized harvest. one of the key points

Method used

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  • Field screening method for density-tolerant high-yield maize strain suitable for mechanical kernel reaping
  • Field screening method for density-tolerant high-yield maize strain suitable for mechanical kernel reaping
  • Field screening method for density-tolerant high-yield maize strain suitable for mechanical kernel reaping

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Embodiment 1

[0026] A field screening method for high-density tolerance and high-yield suitable grain machine-harvested corn strains, the operation steps of the primary selection of high-vigorance seeds and seedling drought-resistant corn strains are as follows:

[0027] (1) Select a suitable ecological area and period: In the ecological area where the altitude is 1600m and the annual rainfall is 1000mm, Yunnan summer maize is intensively produced. During the transitional period when the rainy season has not yet come, choose to sow when the weather is sunny and less rainy, and the soil is dry and water-deficient. The primary corn strains are selected by investigating the emergence rate in the field and combining the average value of the emergence rate and the coefficient of variation.

[0028] (2) Establish the test plot and conduct a first-level field plot test: select a gentle slope section with a turtle-back shape, the slope is generally between 7%, and fully plow the soil with a rotary ...

Embodiment 2

[0036] A field screening method for high-density, high-yield and machine-harvestable maize strains suitable for grain harvesting, the operation steps of the primary selection of high-vigorance seeds and seedlings for drought-resistant maize strains are as follows: select a suitable ecological zone at an altitude of 1300m and a period with an annual rainfall of 800m and Selecting the test slope is 5% land preparation and then arranges the field plots, then ditching and fertilizing in the field plots while using 80 milliliters of 12.5% ​​cyfluthrin suspending agent for seed dressing and stacking for 2 hours, and then covering the soil after the pretreatment for sowing, The thickness of the covering soil is 5cm, and then immediately dilute with 150ml of 50% emulsifiable acetochlor herbicide per acre mixed with water and spray the soil surface evenly, then carry out first-level field management, and calculate the field emergence rate and variation coefficient according to the field ...

Embodiment 3

[0038]A field screening method for high-density, high-yield and machine-harvestable maize strains suitable for grain harvesting. The operation steps for primary selection of high-vigorance seeds and seedlings for drought-resistant maize strains are as follows: select a suitable ecological zone at an altitude of 1900m and a period with an annual rainfall of 1300m, Select the test slope to be 10% plots and arrange field plots after site preparation, then ditch and fertilize in the field plots while using 12.5% ​​cyfluthrin suspending agent 160 milliliters of seed dressing for 4 hours, and then cover the soil after pretreatment and sow. Cover the soil with a thickness of 8cm, then immediately dilute with 50% emulsifiable oil acetochlor herbicide 200ml per acre and then evenly spray the soil surface, and carry out first-level field management, and calculate the field emergence rate and variation coefficient according to the field emergence in the appropriate period According to the...

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Abstract

The present invention discloses a field screening method for a density-tolerant high-yield maize strain suitable for mechanical kernel reaping. The field screening method comprises the following steps: (1) preliminary selection of a maize strain with high seed vigor and high seedling drought resistance, i.e., selecting proper land plots for field plot trials, and screening out the maize strain with high seed vigor and good seedling drought resistance by calculating field seedling emergence and variation coefficients; (2) re-selection of a dense planting-tolerant high-yield maize strain, i.e., carrying out high-density planting management to the maize strain screened out in the step (1), and screening out a dense planting-tolerant maize strain with stable high yield according to disease resistances in combination with yield levels; and (3) final selection of a maize strain suitable for mechanical kernel reaping, i.e., carrying out wide field dense planting and management to the maizestrain screened out in the step (2), and screening out the maize strain suitable for mechanical kernel reaping according to a kernel water content at harvest time and mechanical reaping weight indices. The field screening method to which the present invention relates is capable of screening out a density-tolerant high-yield maize strain suitable for mechanical kernel reaping that fits the gentle-slope mountainous environment of Yunnan.

Description

technical field [0001] The invention relates to the technical fields of crop cultivation and breeding, in particular to a field screening method for a high-density-resistant, high-yielding, suitable-grain machine-harvested corn strain. Background technique [0002] Corn is an important food crop in the world. In my country, corn has risen to become the largest food crop, and it has an important strategic position in ensuring my country's food security. In recent years, due to the impact of dense corn planting and foreign corn, my country's maize production pattern has undergone significant changes, and the breeding objectives and models of maize breeding have also undergone significant changes. At present, with the acceleration of rural urbanization in my country, a large number of agricultural laborers are moving to cities, the mode of corn production and the structure of labor force are undergoing great changes, the speed of large-scale production is accelerating, and new ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01H1/04A01G22/20A01B79/02A01C21/00C05G1/00
CPCA01B79/02A01C21/005A01H1/04A01G22/20C05B1/02C05C9/00C05D1/02
Inventor 雷恩卢丙越王田涛李河袁盛勇刘艳红杨申宣李珣耿永克邵迪朱天彪舒星环建华
Owner HONGHE COLLEGE
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