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High-temperature-avoiding yield-maintaining method for rice

A high-temperature rice technology, which is applied in the field of high-temperature avoidance and production preservation of rice, can solve the problems of shortened rice growth period, decreased thousand-grain weight, and decreased seed-setting rate, and achieves the effects of maintaining production in disasters, avoiding or reducing high-temperature hazards

Active Publication Date: 2021-02-23
CHINA NAT RICE RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

High temperature heat damage mainly directly leads to the decrease of seed setting rate, followed by high temperature precociousness caused by rice filling and fruiting stage, and the thousand-grain weight decreases; and rice growth period is shortened, and biomass and yield decrease

Method used

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  • High-temperature-avoiding yield-maintaining method for rice
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  • High-temperature-avoiding yield-maintaining method for rice

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Experimental program
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Embodiment 1

[0040] 1. Variety screening

[0041] In recent decades, with the advancement of genetic improvement technology of rice varieties in my country, the types and quantity of rice varieties produced have increased. Although the environmental temperature for rice variety breeding has gradually increased, and the tolerance of varieties to high temperature and heat damage during the flowering and fruiting stage has improved, but there are still great differences in the characteristics of high temperature and heat damage resistance among varieties. From 2017 to 2019, 159 varieties of different types were used in production, and a special artificial climate box was used to treat rice with high temperature for 3 days during the earing and flowering stage. Artificial Two temperature gradients were set in the climate box, and the humidity was controlled at 70-80% (Table 6). Screening results showed that 5 heat-resistant cultivars (N22 control) were screened, including Zhensizhan No. 1, Hu...

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Abstract

The invention relates to a high-temperature-avoiding yield-maintaining method for rice. According to the high-temperature-avoiding yield-maintaining method for the rice, high temperature prevention isperformed in multiple directions such as screening high-temperature-resistant varieties, carrying out sowing in a proper period, cultivating strong seedlings, carrying out irrigation, increasing silicon, adjusting the density, and carrying out chemical regulation, a comprehensive disaster prevention and reduction system is established, high-temperature harm can be avoided or reduced, and yield can be guaranteed when disasters happen; and the method is suitable for high-temperature susceptible regions of China, especially the middle and lower reaches of the Yangtze River and southwest rice regions, such as Zhejiang Fuyang, Anhui Lujiang, Hubei Jingzhou and Sichuan Luzhou.

Description

technical field [0001] The invention relates to the technical field of rice planting, in particular to a method for avoiding high temperature and maintaining yield of rice. Background technique [0002] The growing season of single-season rice in my country is also a high-temperature period of the year. The reproductive growth period of rice is the highest temperature period of the year. The temperature rise caused by global climate change will lead to high-temperature heat damage of rice. High temperature heat damage mainly directly caused the decrease of seed setting rate, followed by high temperature precociousness during the grain filling stage of rice, and the decrease of 1000-grain weight; and the shortening of rice growth period, and the decrease of biomass and yield. [0003] In the past 50 years in my country, there have been 6 major rice heat damage events. Among them, in 2003, the single-cropping rice heat damage area in the Yangtze River Basin reached 10 million ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01G22/22A01G7/06A01N43/22A01N43/16A01N37/40A01P21/00
CPCA01G22/22A01G7/06A01N43/22A01N43/16A01N37/40A01P21/00A01C21/00A01C21/007A01G25/167
Inventor 张玉屏王亚梁陈惠哲向镜张义凯王志刚
Owner CHINA NAT RICE RES INST