Method for screening rice variety with high nitrogen fertilizer utilization efficiency

A screening method, high-nitrogen fertilizer technology, applied in rice cultivation, botany equipment and methods, applications, etc., can solve the problems of long period required for nitrogen fertilizer use efficiency measurement, large error, long period of nitrogen fertilizer use efficiency index measurement period, etc.
CN109042176AActive Publication Date: 2018-12-21YANGZHOU UNIV
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
YANGZHOU UNIV
Publication Date
2018-12-21

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Abstract

The invention discloses a method for screening a rice variety with high nitrogen fertilizer utilization efficiency, the method comprises the following steps: the light distribution and light attenuation coefficient (KL) in the canopy and the nitrogen distribution and nitrogen attenuation coefficient (KN) in the canopy under different cultivation conditions of the field at the specific growth period of the rice culture. By using the light-nitrogen matching index (KN/KL) in the canopy at the blooming stage as the evaluation index, the rice variety with higher nitrogen fertilizer utilization efficiency is screened out. The variety with a canopy light-nitrogen matching index of 0.35 is a variety with high nitrogen fertilizer utilization, and the variety with a canopy light nitrogen matching index of 0.2 is a variety with low nitrogen fertilizer utilization efficiency. By using the method, the rice variety with high yield and high nitrogen fertilizer utilization efficiency can be screened out from the photosynthetic physiological angle of the canopy.
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Description

technical field

[0001] The invention relates to a method for screening rice varieties with high nitrogen utilization efficiency, and belongs to the technical field of rice screening. Background technique

[0002] Nitrogen is one of the three major nutrients necessary for plant growth. For most farmland soils, nitrogen fertilizer application is needed to solve the shortage of soil nitrogen fertilizer supply to maintain and increase crop yield. Rice is the main food crop in my country, which needs a large amount of nitrogen. For a long time, it has relied on a large amount of nitrogen fertilizer and other chemical fertilizers to increase rice production. However, the excessive use of nitrogen fertilizer not only greatly increases the cost of rice production, but also causes serious pollution to the surrounding water environment. Therefore, cultivating and selecting rice varieties with high nitrogen utilization efficiency is of great significance for reducing the application ...

Claims

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