Method for reducing and controlling losses of nitrogen and phosphorus of rice

Abstract

The invention discloses a method for reducing and controlling losses of nitrogen and phosphorus of rice, belonging to a method of zero tillage and standard open tillage of the rice and comprising the following steps of: digging a surrounding ditch around the rice; digging a waist ditch and a side ditch for dividing the rice into several side surfaces; flattening the side surfaces; fertilizing enough basic fertilizers; coating films for tightly attaching ground films to clay on the side surfaces; pressing both sides by using the clay; transplanting the rice; keeping water in the ditches rather than in the film surfaces; drying the water in the rice within 15 days before the rice is ripe; and leaving low rice stubble in rice harvest. In the method, irrigation with water saving is realized, the purpose for reducing and controlling the losses of nitrogen and phosphorus of the rice is realized, and a theoretical basis and a realizing mode are supplied for scientifically and reasonably building the environmentally friendly utilization mode of the rice.

Description

technical field [0001] The invention belongs to a construction technology of an environment-friendly utilization mode of paddy fields, and is a new method for reducing the loss of nitrogen and phosphorus in paddy fields. Background technique [0002] The contribution of rice production in ensuring global food security and promoting world social and economic development has attracted worldwide attention. my country is the largest rice producer and consumer country in the world, and rice production provides ration consumption guarantee for more than 60% of the population in my country. In addition to product supply, the more important rice paddy wetland ecosystem is an important ecological unit for environmental protection. [0003] For half a century, countries all over the world have regarded increasing the application of chemical fertilizers as an important agricultural measure to increase rice production. my country is one of the countries with the highest amount of chem...

AI Technical Summary

Problems solved by technology

Excessive fertilization can not further increase crop yields, but instead reduces the utilization rate of chemical fertilizers, increases losses, and brings negative impacts on the environment. It not only reduces the cleaning function of rice fields, but also leads to soil and groundwater pollution, causing river pollution. and eutrophication of lake water quality, endangering human health and restricting the sustainable development of agriculture

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