A method of using sand culture to grow pasture to absorb biogas slurry in pig farms

Abstract

The invention discloses a method for utilizing a sand culture mode to plant forage grass to consume biogas slurry of a pig farm. The method includes that high-efficiency sewage consumption and fresh grass supply of the forage grass is realized by constructing a waterproof and rainproof sand culture container, laying and pouring sand girt, controlling concentration of the biogas slurry, irrigating the biogas slurry, planting the forage grass and harvesting the forage grass. According to the method, biogas slurry consumption quantity of the forage grass per unit area can be remarkably increased. The forage grass produced by the method has the advantages of high yield, good quality and the like. Land for forage grass production can be greatly reduced by fully utilizing space advantage; by further transforming equipment, controllable and intensive production of high-quality forage grass can be realized, and large-scale production of plant-eating animals is benefitted.

Description

technical field [0001] The invention belongs to the field of high-efficiency utilization of pig raising waste, and more particularly relates to a method for planting forage grass in a sand culture method in southern regions to absorb biogas slurry from pig farms. Background technique [0002] In recent years, the scale of pig farming in my country has developed rapidly, and the corresponding excrement emissions have also increased sharply. Through the promotion and utilization of biogas projects, the use of breeding waste in pig farms for the production of clean energy is the main mode of manure treatment at present. However, while producing biogas, a biogas project will also produce a large amount of biogas residue and biogas slurry in a balanced manner. If it is not treated in time, it will cause secondary pollution. At present, due to economic reasons, the treatment of most biogas residues and biogas slurry is mainly based on nearby agricultural consumption, but there ar...

AI Technical Summary

Problems solved by technology

In order to obtain the efficient green supply capacity of forage grass, high-quality land resources and fine field management must be equipped, which also greatly limits the development of grass planting in areas where agricultural production is dominant. It has a certain tolerance, but it is easy to cause the loss of excess biogas slurry water and fertilizer, forming secondary pollution, which further limits the ability of the farmland system to absorb biogas slurry

Therefore, some researchers try to use closed hydroponic systems to solve this problem, but the results show that the biological yield of most pasture species in hydroponic systems is not high, and there are factors such as difficulty in harvesting, which make it difficult to promote the use in production

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