A plant growth conditioner for reducing rice high temperature damage, its use method and application

Abstract

The invention discloses a plant growth conditioner for reducing damage caused by high temperature to rice, and a using method and application of the plant growth conditioner. The conditioner comprises gibberellin and salicylic acid, wherein the weight ratio of gibberellin to salicylic acid is (0.5-1.5):(0.15-0.6). The conditioner can also comprise chitosan oligosaccharide according to a certain ratio. When the conditioner is used, an aqueous solution form is adopted, wherein an aqueous solution is prepared from 50 to 150mg / L of gibberellin, 15 to 60mg / L of salicylic acid and 50 to 200mg / L of chitosan oligosaccharide, and is applied to leaves in a spraying way during the meiosis stage of pollen mother cells of rice, and 30 to 45 liters of aqueous solution is applied to each acre. The plant growth conditioner can be applied to reduce the damage caused by high temperature to rice, and is suitable for popularization and application in a rice culturing region on the middle and lower reaches of Changjiang River, particularly in a region at which the temperature in a flowering period is always high, and high and stable yield of rice is ensured.

Description

technical field [0001] The invention relates to the field of plant growth conditioners, in particular to a plant growth conditioner for alleviating rice high-temperature damage, its use method and application. Background technique [0002] According to statistics, among the losses caused by various natural disasters, meteorological disasters such as catastrophic weather, climate and agricultural meteorological disasters account for more than 60%. Rice yields have been particularly affected. [0003] With the acceleration of the global industrialization process, the frequency of abnormal temperature hazards to rice production is increasing. As a result, rice production areas are often affected by heat damage at different development stages of rice, especially during the heading, flowering and filling stages of rice. production cuts. [0004] In 1971, the occurrence of high temperature and heat damage caused the loss of more than 2 billion kilograms of rice in the middle and...

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Problems solved by technology

[0005] In addition to Hubei and Anhui provinces, Jiangsu, Guangdong, Zhejiang, Sichuan, Hunan and other major southern rice-producing provinces also suffered from high temperature and heat damage to varying degrees at the earing stage, resulting in a low seed-setting rate of single-crop rice and a serious reduction in yield.

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