Cluster setting rate improving method by mixed cropping of different corn varieties

A technology of seed setting rate and varieties, applied in the direction of grain cultivation, etc., to achieve the effects of reducing yield loss, high vitality, and increasing production costs

Active Publication Date: 2019-01-15
HENAN AGRICULTURAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Selection of Complementary Varieties Based on Differences in Resistance to Disasters

Method used

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  • Cluster setting rate improving method by mixed cropping of different corn varieties
  • Cluster setting rate improving method by mixed cropping of different corn varieties
  • Cluster setting rate improving method by mixed cropping of different corn varieties

Examples

Experimental program
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Effect test

Embodiment 1

[0031] The varieties selected in this embodiment are Denghai 662 (National Examination Jade 2009010) and Denghai 701 (Lu Nongshen 2009003). In this variety combination, there is Denghai 662 which has a bad silking period and loose powder period, and the silking period is later than The powder loosening period is 2 days, and the amount of pollen is small, and the silking period is too long, which will easily cause poor firmness at the top and bottom of the ear. The silking period of Denghai 701 coincides with the pollination period, almost on the same day. It is a variety with a good flowering period, and has a large amount of pollen. The problem that Denghai 662 single cropping is prone to is that the slow-growing filaments located at the bottom and top of the ear wait until the bracts are spit out, and the loose pollination of the tassel itself is over, so the phenomenon of baldness and baldness often occurs during production. The performance is more serious. According to th...

Embodiment 2

[0050] The varieties selected in this embodiment are Weike 702 (National Examination Jade 2012010) and Denghai 605 (National Examination Jade 2010009). Silk is earlier than loose powder, and Denghai 605 is later than loose powder. But the difference is not big, the time difference between the spinning period and the loose powder period is 1.5-2 days.

[0051] In production practice, except that the bottom of Denghai 605 fruit ear is not complete, in normal years, the pollen of these two varieties can basically meet the needs of their own fertilization and fruiting. However, Denghai 605 has poor heat resistance, and the bottom of the ear is prone to baldness in years of high temperature and heat damage. It may be due to the slow growth of Denghai 605 under the condition of high temperature, and the delayed silking time, resulting in poor encounter between male and female at flowering stage. Therefore, when Denghai 605 and Weike 702 are planted together as intercropping variet...

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Abstract

The invention discloses a cluster setting rate improving method by mixed cropping of different corn varieties. Varieties with high resistance in the adverse condition are mixed cropped reasonably to prolong pollen dispersal duration of a mixed cropped group, provide sufficient high-quality pollen for insemination and setting of gynoecium, improve the group setting rate, and solve the problems thatadverse growth of male and female ears in the adverse condition causes unsatisfied encountering state of florescence, relatively low pollen quality and less pollen. Fertility and habit change of thevarieties in meteorological disasters are used ingeniously to match and combine the variables properly, a reasonable mixed cropping plantation belt is formed, the cluster setting rate of the mixed group is improved, and the group output is improved. The pollen complementary effect can be used to overcome the problem that gynoecium in the variety with early fusule but late pollen dispersal in the adverse condition needs to wait for pollen, there is pollen when filaments are provided to realize insemination, and insemination is completed when the filaments are most vital.

Description

technical field [0001] The invention belongs to the technical field of agricultural production, and relates to a method for improving the ear-setting rate of corn populations by intercropping different corn varieties. Background technique [0002] Corn is the largest food crop in my country, and it is used for both food and feed, and has a broad market prospect. Therefore, achieving high and stable yields of corn is crucial to my country's food security. Maize monoecious flowers are ectopic, and pollination and fruiting are easily affected by environmental changes, which affects the ear setting rate of corn and leads to large fluctuations in yield. [0003] In recent years, affected by global warming, extreme weather has occurred frequently, natural disasters have occurred frequently, and the seed setting rate of corn has been seriously affected. Responses of different species to disasters showed differences. Selecting varieties with good resistance is an important way to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01G22/20
CPCA01G22/20
Inventor 李潮海李鸿萍王群赵亚丽李志宾
Owner HENAN AGRICULTURAL UNIVERSITY
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