Rice leaf green-keeping anti-freezing agent, and using method and application thereof

Abstract

The invention discloses a rice leaf green-keeping anti-freezing agent, and a using method and application thereof. The rice leaf green-keeping anti-freezing agent comprises gibberellin and brassinolide, wherein the weight ratio of gibberellin to brassinolide is (50-200):(0.025-0.10). The rice leaf green-keeping anti-freezing agent can also comprise chitosan oligosaccharide according to a certain ratio. When the rice leaf green-keeping anti-freezing agent is used, an aqueous solution form is adopted, wherein an aqueous solution is prepared from 50 to 200mg / L of gibberellin, 0.025 to 0.10mg / L of brassinolide and 100 to 300mg / L of chitosan oligosaccharide, and is applied to rice leaves in a spraying way during the full heading stage to milk-ripe stage of rice, and 30 to 45 liters of aqueous solution is applied to each acre. The rice leaf green-keeping anti-freezing agent can be applied to prevent the hazard of low temperature damage in autumn after the filling of late rice, has leaf anti-freezing and green-keeping effects as well as the effects of promoting the photosynthesis of the rice and retarding the aging of the leaves, has remarkable yield increasing effects, is a novel rice culturing technology capable of ensuring the high and stable yield of rice, and is suitable for popularization and application.

Description

technical field [0001] The invention relates to the field of plant growth regulating substances, in particular to an antifreeze agent for keeping green rice leaves, its use method and application. Background technique [0002] Rice is the main food crop in my country. Rice is the staple food of 60% of the population in China, and about 50% of the farmers are engaged in rice production. Rice farming is the number one agricultural task in my country. More people, less land and less water is the basic national condition of our country. How to use limited land resources and fresh water resources to ensure food security in our country is the main proposition of the progress of rice farming science and technology. [0003] The main meteorological disasters that restrict the high and stable yield of double-cropping late rice are the summer and autumn drought before the safe heading and the cold dew wind at the heading and flowering stage. The heading and flowering period of late r...

AI Technical Summary

Problems solved by technology

However, under the current climate background, one is the limitation of the growing season and growth period of rice, and the other is that extreme weather occurs frequently and is almost unpredictable. For the middle reaches of the Yangtze River, which is more sensitive to the impact of cold dew wind, how to use the law of cold dew wind to select suitable earing plants? It is difficult to realize the flowering stage in actual operation

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