A facility soil nitrate pollution improvement agent and its preparation method and use method

Abstract

The invention belongs to the field of agricultural pollution prevention and control, and in particular relates to a greenhouse soil nitrate pollution modifying agent used for comprehensively modifying greenhouse soil nitrate pollution and effectively preventing and controlling underground water nitrate pollution risk in intensive vegetable planting regions, and a preparation method and a using method thereof. The greenhouse soil nitrate pollution modifying agent consists of composite liquid and effective microorganism (EM) bacteria liquid with equal mass ratio, wherein the composite liquid is prepared from sodium humate and dicyandiamide through composite proportioning; the EM bacteria liquid is bacterial liquid of fermented EM bacteria; and the composite liquid and the EM bacteria liquid are mixed according to the mass ratio of 1:1. The composite liquid and the EM bacteria liquid are combined to be irrigated and applied to soil, so that the greenhouse soil nitrate pollution can be prevented and controlled through biological and chemical control technological means, the nitric nitrogen content of the greenhouse soil can be reduced by above 10 percent, and the nitrogen utilization ratio of crops can be increased by above 15 percent.

Description

technical field

[0001] The invention belongs to the field of agricultural pollution prevention and control, and specifically relates to a facility soil nitrate pollution improvement agent for comprehensively improving facility soil nitrate pollution and effectively preventing and controlling the risk of groundwater nitrate pollution in intensive vegetable planting areas, as well as its preparation method and use method . Background technique

[0002] In the process of intensive facility production, a large amount of nitrogen fertilizer and organic materials are applied in order to pursue the greatest economic benefits, resulting in leaching of nitrate in the soil and nitrate pollution in surface water and groundwater. The prevention and control measures of nitrate pollution in facility soil at home and abroad are mainly through the following methods: (1) Application of nitrogen inhibitors. The amount of nitrogen fertilizer inhibitors should be determined according to the ni...