Method for controlling nitrogen and phosphorous non-point source pollution of cropland by using biological ridge

Abstract

The invention relates to a method for controlling nitrogen and phosphorous non-point source pollution of cropland by using a biological ridge and belongs to the technical field of agricultural environment protection. The method includes that first cropland with a main ridge, a branch ridge and a rough ridge is selected. The cropland is defined to form an enclosed area with area larger than 300m<2> with the three ridges as boundaries. The enclosed area is more than 60m in length and more than 50m in width, and each area is provided with a water inlet and a water outlet. Then, the main ridge is paved, after pavement, arbors are transplanted on the main ridge from the middle of March, shrubs are planted on the main ridge and the branch ridge at the beginning of April, herbal economic plants are planted on the main ridge, the branch ridge and the rough ridge from the middle of April, large-scale spring crop planting is conducted at the end of April, small-scale spring crop planting is conducted at the end of September, and herbal economic plants and crops of the ridges are subjected to crop rotation synchronously. By means of an interception effect on nitrogen and phosphorus of the biological ridges, an area ecological environment is improved, water and soil loss is prevented, and cropland environment safety is guaranteed. Meanwhile, resource use rate is improved, cropland biodiversity is improved, production cost is reduced, pollution of a nitrogen element on the environment is reduced, and cost and labor investment are saved.

Description

technical field [0001] The invention relates to a method for controlling farmland nitrogen and phosphorus non-point source pollution by using biological ridges, and belongs to the technical field of agricultural environmental protection. Background technique [0002] The field ridge is an important part of the farmland environment, and a variety of plants grow on the field ridge, which is not only a valuable biological resource, but also an indispensable landscape element in the pastoral scenery. Ridge plants play the role of soil protection and solid ridge. However, with the development of modern agriculture, ridge plants are neglected by people. Farmers use a large amount of herbicides to eliminate them, and farmland uses a large amount of chemical fertilizers. If things go on like this, the biodiversity of ridge plants will be monotonous, and the problem of environmental pollution will become more prominent. . Field ridges are regarded as non-productive areas and left i...

AI Technical Summary

Problems solved by technology

However, the excessive input of nitrogen and phosphorus fertilizers has brought about worrying environmental problems

Agricultural non-point source pollution is the most important non-point source pollution. The amount of nitrogen and phosphorus fertilizers lost by farmland runoff and lateral seepage occupies a very important position in the agricultural non-point source pollution load. At present, the methods of nitrogen and phosphorus control of farmland runoff at home and abroad There are many, but there are few control methods for its lateral seepage

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