Network laddering efficient recycling method for tail water of off-shore vegetable plots in mountainous area, mid-mountainous area, river and lake

Abstract

The invention discloses a network laddering efficient recycling method for tail water of off-shore vegetable plots in a mountainous area, a mid-mountainous area, a river and a lake. The method comprises the following steps: utilizing a network laddering efficient recycling facility for tail water of off-shore vegetable plots in the mountainous area, the mid-mountainous area, the river and the lake to perform network laddering efficient recycling on the tail water of off-shore vegetable plots in the mountainous area, the mid-mountainous area, the river and the lake; in the period of high-concentration emission of nitrogen and phosphorus of the tail water of the vegetable plots, performing spraying irrigation on 300mu vegetable plots by using tail water of the vegetable plots in the irrigation tank in the facility and the water fertilizer solution prepared in the water fertilizer filling tank. 0.96 ten thousand m3 / season tail water of the vegetable plots can be utilized; 0.24 ten thousand m<3> / season irrigation water can be saved; the dosages of the chemical fertilizers N, P2O5 and K2O are respectively reduced by 13.8 kg / mu / season, 2.4kg / mu / season and 3.5 kg / mu / season; the removal rates of nitrogen and phosphorus in the farmland tail water flowing into the river and lake are respectively 45% and 52%; 3.47 kg / hm<2> nitrogen pollutant and 0.59 kg / hm<2> phosphorus pollutant discharged into the river and lake are reduced annually.

Description

technical field [0001] The invention relates to the technical fields of agricultural environmental protection and efficient utilization of water resources. Specifically, it relates to a cascaded and efficient reuse method for the tailwater network of rivers and lakes near shores of vegetable fields in mid-mountainous areas. Background technique [0002] Vegetable land is widely distributed in the farmland near the river and lake, and it is one of the important land use methods of the farmland near the river and lake. Vegetable root systems are underdeveloped and highly dependent on water and fertilizers. A large amount of fertilization and irrigation is required to ensure the growth of vegetables, and the multiple cropping index is high, resulting in a high accumulation of nitrogen and phosphorus nutrients in the vegetable surface soil. When the vegetable field is irrigated or rained, excess irrigation water or runoff from rainfall will carry the nitrogen and phosphorus in ...

AI Technical Summary

Problems solved by technology

[0006] In order to better solve the pollution of the high-concentration tail water of the river and lake near the shore of the mountainous area to the water body of the river and lake, and to change the current technical problem of a large amount of nitrogen and phosphorus loss in the farmland caused by the large amount of water and fertilizer in the vegetable planting process, the present invention provides a A cascaded and efficient reuse method for the tailwater network of rivers and lakes near the coast of vegetable fields in the mid-mountainous area of ​​Zhongshan District

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