Method for screening corn genotype capable of improving nitrogen efficiency of corn/soybean intercropping system

A technology of genotype and nitrogen efficiency, which is applied in the fields of plant genetic improvement, botany equipment and methods, legume cultivation, etc., can solve the problems affecting the efficient use of nitrogen, the selection of corn varieties has no basis, and affects the nitrogen fixation effect of soybeans, etc. Achieve the effect of improving the overall nitrogen efficiency

Active Publication Date: 2019-02-12
INST OF SOIL FERTILIZER SICHUAN ACAD OF AGRI SCI
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Problems solved by technology

There are significant differences in the nitrogen acquisition capacity and root exudate capacity of different maize varieties, which may affect the nitrogen fixation effect of soybean in intercropping systems, and ultimately affect the efficient use of nitrogen in the entire production system
However, there is currently no basis for the selection of maize varieties in intercropping systems

Method used

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  • Method for screening corn genotype capable of improving nitrogen efficiency of corn/soybean intercropping system
  • Method for screening corn genotype capable of improving nitrogen efficiency of corn/soybean intercropping system

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Embodiment

[0034] This embodiment is mainly completed through two steps.

[0035] 1: Screen the most suitable maize genotype with deep root type, strong root exudate ability and high system yield for soybean intercropping combination, mainly through the following methods;

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Abstract

The invention discloses a method for screening a corn genotype capable of improving nitrogen efficiency of a corn/soybean intercropping system, and belongs to the technical field of agriculture planting. The method is characterized by comprising the steps that genotype corn species with deep root, high ability of root secretion, and high system yield capable of being intercropped with soybean arescreened out, the corn species are divided to be deep root and shallow root and intercropped with soybean, the physiological mechanism of nitrogen efficiency difference of corn/soybean intercropping system is analyzed, and accordingly the corn genotype capable of improving the nitrogen efficiency of the corn/soybean intercropping system is screened out. The underground interaction mechanism of a monoculture system and the influence on the nitrogen fixation efficiency of intercropped soybean are researched by screening the corn species with different root system architectures and root secretions, thus the root system morphology physical features of the corn species suitable for the corn/soybean intercropping system are clarified, and the integral nitrogen efficiency of the intercropping system can be improved.

Description

technical field [0001] The invention belongs to the technical field of agricultural planting, and in particular relates to a technology for screening corn varieties with differences in root system characteristics to improve the nitrogen efficiency of a corn / soybean intercropping system. Background technique [0002] Corn-soybean intercropping is a typical configuration representing the intercropping of tall and dwarf crops and grain crops, and it is a dryland planting method with strong adaptability. The jade / bean model has been distributed all over the country before the founding of the People's Republic of China. It is also a new type of high-efficiency multi-cropping intercropping model in dryland that has developed rapidly in Southwest China in recent years. It can increase production and income, increase biodiversity in farmland ecosystems, and improve nitrogen utilization. rate, an important measure to reduce the use of chemical fertilizers. In 2013, the promotion are...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01H1/04A01G22/40A01G22/20
CPCA01H1/04A01G22/20A01G22/40
Inventor 郭松秦鱼生陈庆瑞陈琨樊红柱喻华曾祥忠上官宇先周子军
Owner INST OF SOIL FERTILIZER SICHUAN ACAD OF AGRI SCI
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