Slope farmland nitrogen phosphor loss control method

Abstract

The invention discloses a slope farmland nitrogen phosphor loss control method comprising the following steps: A, charcoal trench design and construction: 1, building a charcoal trench: building the charcoal trench on the bottom of the slope farmland, wherein the trench side slope and bottom are respectively soil texture; 2, filling a soil-charcoal layer: filling soil and modified small aperture charcoal in the trench in layers according to a certain proportion; 3, planting a plant fence: planting the plant fence on the first original surface layer soil; B, building a water stop ridge: building the water stop ridge between the most bottom slope of the slope farmland and the edge of the charcoal trench; C, burying a diversion pipe: burying the diversion pipe on the bottom of the charcoal layer; D, charcoal trench management and maintenance: 1, regularly cleaning sands; 2, regularly inspecting and maintaining the water stop ridge. The slope farmland nitrogen phosphor loss control method is simple in operation, cannot content soil with crops, the charcoal can be repeatedly used, and the plant fence has high economic benefits, thus providing important meanings for controlling slope farmland and orchard surface source pollution.

Description

technical field [0001] The invention relates to the field of agricultural ecological environment protection, in particular to a method for preventing and controlling the loss of nitrogen and phosphorus in sloping cultivated land. The operation is simple, does not compete with crops for land, biochar can be reused, and hedgerows have high economic benefits. Background technique [0002] Sloping cultivated land refers to the dry land distributed on hillsides with poor ground flatness, prominent problems of running water, fertilizer and soil, and low crop yields. my country's sloping cultivated land is about 359 million mu, accounting for nearly 1 / 5 of the national cultivated land area. The loss of soil nutrients in sloping cultivated land is due to the rainfall acting on the surface soil, and the runoff causes the dissolution and loss of nutrients such as nitrogen and phosphorus in the soil, or the process that the granular nutrients contained and adsorbed in the runoff sedim...

AI Technical Summary

Problems solved by technology

[0008] At present, most researchers apply biochar evenly to the soil, which can improve soil, increase fertilizer efficiency, and increase soil organic matter content. Soil surface plays little role in controlling nitrogen and phosphorus loss

Some people also bury biochar and soil under a certain proportion of agricultural non-point source polluted sewage collection ditches, but it is not practical on slope farmland with small plots, and no plants are planted to absorb the nitrogen and phosphorus accumulated in biochar. Make biochar non-reusable