Cultivation method for preventing chilling injury of rice

A cultivation method and rice technology, which are applied in the fields of rice cultivation, fertilization method, fertilization device, etc., can solve the problems of yield reduction and poor rice growth conditions, and achieve the effects of increasing rice yield, improving cold resistance, and improving biological physiological characteristics.

Inactive Publication Date: 2020-03-31
黑龙江省农业科学院植物保护研究所
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] For this reason, the embodiment of the present invention provides a cultivation method for preventing chilling injury of rice, so as to solve the problem in the prior art that rice production is reduced due to poor growth conditions due to cold weather.

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  • Cultivation method for preventing chilling injury of rice

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Embodiment 1

[0024] To improve the salinity of the land, when the pH value of the land is greater than 8.5, the soil should be washed with alkali when harrowing. Soda is washed when water is mixed, and water is mixed into m soup when tillering, which often causes slow seedlings and dead seedlings. Soda washing at high temperature, the water temperature in the middle and late June reaches above 22°C, red leaves, erythema, red blight are prone to occur, and soda washing should be combined with spraying leaf fertilizer. Furthermore, if the salinity is heavy, you can put the acidified grass carbon into the silk bag, and put it in the channel or the water outlet when you put new water, so as to improve the acid-base condition of the Honda, and the effect is better. Light-sun, light-salinity plots or plots with moss and red blight can be light-sunned at the end of June, and it is better to dry the field at night or on cloudy days. After it cracks slightly, water it, or discharge it about 4-6 ho...

Embodiment 2

[0040] Apply base fertilizer before rice transplanting, apply tiller fertilizer after rice transplanting, and apply panicle fertilizer when rice grows branches and ears; in a cold climate, when rice is planted, the ratio of the total amount of nitrogen fertilizer applied per mu to When rice is normally planted, reduce the amount of nitrogen fertilizer applied by 25%, of which 75% of the total nitrogen fertilizer is used as base fertilizer and tiller fertilizer, and 25% of the total nitrogen fertilizer is used as ear fertilizer. Preferably, in order to prevent low temperature and chilling damage in the later stage of late rice, early-onset fertilization is adopted in fertilization, that is, in paddy fields with higher fertilization levels, the ratio of base fertilizer: tiller fertilizer: ear fertilizer is 40:30:30, and tiller fertilizer can be applied earlier. Apply as surface fertilizer; in paddy fields with low fertilization level, use all the fertilizer as base fertilizer or ...

Embodiment 3

[0048] Apply base fertilizer before rice transplanting, apply tiller fertilizer after rice transplanting, and apply panicle fertilizer when rice grows branches and ears; in a cold climate, when rice is planted, the ratio of the total amount of nitrogen fertilizer applied per mu to When rice is normally planted, reduce the amount of nitrogen fertilizer applied by 30%, of which 80% of the total nitrogen fertilizer is used as base fertilizer and tiller fertilizer, and 20% of the total nitrogen fertilizer is used as ear fertilizer. Preferably, in order to prevent low temperature and chilling damage in the later stage of late rice, early-onset fertilization is adopted in fertilization, that is, in paddy fields with higher fertilization levels, the ratio of base fertilizer: tiller fertilizer: ear fertilizer is 40:30:30, and tiller fertilizer can be applied earlier. Apply as surface fertilizer; in paddy fields with low fertilization level, use all the fertilizer as base fertilizer or ...

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Abstract

The embodiment of the invention discloses a cultivation method for preventing chilling injury of rice. The method comprises the following steps: applying a base fertilizer before rice transplanting, applying a tillering fertilizer after rice transplanting, and applying a panicle fertilizer when the rice grows branches and panicles, wherein, during the rice planting process, 70%-80% of the total nitrogen fertilizer amount is applied as the base fertilizer and the tillering fertilizer, 20%-30% of the total nitrogen fertilizer amount is applied as the panicle fertilizer, and the total nitrogen fertilizer application amount is reduced by 20%-30% compared with the normal rice planting process. In the cultivation method for preventing chilling injury of rice of the embodiment of the invention, amethod of applying moderate nitrogen and high phosphorus and potassium in fertilization of a rice field is adopted, that is, the total nitrogen fertilizer application amount is appropriately controlled, a fast-acting nitrogen fertilizer is less applied, and a phosphorus and potassium fertilizer is more applied, so that cold resistance of rice seedlings is improved, and the disease is not caused due to poor absorption of phosphorus and potassium after the rice seedlings are transplanted in cold-soaked fields. The microenvironment of rice fields is improved, and thereby the bio-physiological characteristic of rice and the yield of rice are improved.

Description

technical field [0001] The embodiments of the present invention relate to the technical field of crop planting, in particular to a cultivation method for preventing chilling damage of rice. Background technique [0002] During the rice growth process, if it encounters low temperature conditions, the photosynthesis and respiration of rice will be inhibited, and the material metabolism and energy metabolism will be abnormal. Experiments have shown that low temperature affects the net assimilation rate, and when the temperature is lower than 16°C, the net assimilation rate decreases. The new chilling injury mechanism believes that after the low temperature causes the phase transition of the biofilm, the biofilm is damaged, which leads to the disorder of the metabolic system and causes damage. Low temperature causes phase transition of thermophilic crop biofilm, which is the initial response of rice to sub-zero low temperature and also the cause of chilling injury. Due to the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01C21/00A01G22/22
CPCA01C21/00A01G22/22
Inventor 刘佳孟庆林项洪涛石凤梅马立功李易初苏保华王军张崎峰
Owner 黑龙江省农业科学院植物保护研究所
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