Method for carbon sequestration, emission reduction, weight loss and efficiency improvement of machine-harvested rice in coastal rice area of eastern Hebei province

Abstract

The invention provides a method for carbon sequestration, emission reduction, weight loss and synergy of machine-harvested rice in a coastal rice area of East Hebei Province, which comprises the following steps: harvesting rice by using a harvester from the end of October to the first ten days of November, crushing straws, putting the crushed straws in situ, spreading a rice straw decomposing inoculant, and turning over; irrigating in a non-cultivation period until the soil saturation water content is reached; rotary tillage is conducted at the beginning of May in the second year, harrowing is conducted in the middle ten days of May, 450-600 kg / hm < 2 > of nitrogen-phosphorus-potassium slow-release fertilizer is applied to serve as base fertilizer, and sealing treatment is conducted 5-7 days before rice transplanting; transplanting is conducted in mid-to-late May, topdressing is conducted three times after transplanting, 97.5 kg / hm < 2 > of urea is topdressed for the first time, and 112.5 kg / hm < 2 > of urea is topdressed for the second time to the third time; and spraying pesticides for prevention and treatment before diseases and insect pests occur. According to the method, the resource utilization process of the rice straw is promoted, environmental pollution is reduced, the ecological environment is protected, good economic, ecological and social benefits are achieved, and green and sustainable development of agriculture is facilitated.

Description

technical field [0001] The invention belongs to the technical field of straw comprehensive utilization, and in particular relates to a method for machine-harvested rice in coastal rice areas in eastern Hebei to fix carbon, reduce emissions, lose weight and increase efficiency. Background technique [0002] The Hebei coastal rice area is the main rice producing area in Hebei, with a planting area of ​​about 1 million mu. The annual output of rice straw is about 700,000-800,000 tons. Due to the lack of efficient utilization technology, most of them are burned, which not only causes waste of resources, damage to soil ecosystem, but also causes air pollution. In recent years, the government has strictly prohibited the burning of straw, and vigorously advocated the return of straw to the field. It is well known that returning straw to the field is an effective measure to increase the content of soil organic carbon, but if it is unreasonable, it will greatly promote CH 4 emissio...

AI Technical Summary

Problems solved by technology

It is well known that returning straw to the field is an effective measure to increase the content of soil organic carbon, but if it is unreasonable, it will greatly promote CH 4 emissions, the resulting increase in greenhouse effect will outweigh its carbon sequestration effect

Due to the low temperature in winter and spring in this area, the decomposition of straw returning to the field is slow, especially the natural decomposition period of straw overlaps with the stage of rice turning green and tillering, which seriously inhibits the growth of seedlings. This problem has become the main factor affecting the large-scale promotion of straw returning technology

In addition, there are problems such as unreasonable fertilizer ratio and low fertilization accuracy in the rice planting process under the condition of straw returning to the field, resulting in low fertilizer utilization rate, decreased cultivated land quality, increased greenhouse gas emissions, and adverse effects on farmland and atmospheric ecological environment.

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