Biogas slurry application method for rice-wheat rotation in southern costal saline soil

Abstract

The invention provides a biogas slurry application method for rice-wheat rotation in southern costal saline soil, which comprises the steps of delivering biogas from a specific fermenting technique toa field through an enclosed network; after wheat harvesting, crushing straws in situ, returning the crushed straws to the field, carrying out rotary tillage of soil, and injecting a rice biogas slurry fertilizer; planting rice seedlings; applying the rice biogas slurry fertilizer in a special ratio; after rice harvesting, crushing straws in suit, and returning the crushed straws to the field; applying a base compound fertilizer, spraying dilute biogas slurry, and seeding wheat; placing a wheat biogas slurry fertilizer in field biogas slurry furrows in advance, and spraying to the wheat field;harvesting wheat, and returning crushed straws to the field; repeating the above steps to arrive at cyclic rice-wheat rotation. Fertilizer type, fertilizer usage, fertilizer proportion and fertilization time are precisely controlled according to features of costal saline soil and different fertilizer-demanding features of rice and wheat, massive biogas slurry is consumed, and therefore, more organics can accumulate in the southern coastal saline soil, pig farm biogas slurry can be recycled, and soil productivity and eco-environmental functionality of coastal saline-soil agricultural regions can be improved greatly.

Description

technical field [0001] The invention relates to a method for applying biogas slurry in rice-wheat rotation farmland in saline soil in southern coastal areas, and belongs to the fields of agriculture, waste resource utilization and environment. Background technique [0002] In recent years, intensive pig farms have continued to flourish in coastal agricultural areas, and the environmental problems caused by livestock and poultry manure have become increasingly serious. Pollutants from livestock and poultry farming are gradually becoming the main source of non-point source pollution in rural areas. Unreasonable disposal of livestock and poultry pollutants will cause great pollution to the environment, including air pollution, water pollution, soil pollution, biological pollution, etc. According to statistics, the pollutants discharged from livestock and poultry farms in my country have accounted for 60% of the sources of eutrophication in water bodies. [0003] The main proc...

AI Technical Summary

Problems solved by technology

However, the technology and norms of agricultural development and utilization of biogas slurry in my country are still immature, and tend to be simple and low-cost resource-based extensive utilization

Breeding enterprises and farmers often only rely on experience in actual use, which is prone to excessive or insufficient application, which is not only not conducive to agricultural production, but also easily causes water and soil environmental pollution

Moreover, the efficiency of biogas slurry fertilizer is relatively low, the application amount is large, the transportation cost is high, and the conventional irrigation and other application methods are labor-intensive; the unreasonable use of biogas slurry fertilizer ratio will cause problems such as burning seedlings, insufficient nutrition, and polluting groundwater.

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