Humic acid slow release fertilizer suitable for long-term improvement of secondary salinization land

Abstract

The invention discloses a humic acid slow release fertilizer suitable for long-term improvement of secondary salinization land. The humic acid slow release fertilizer comprises, by mass, 120-180 parts of crop wastes, 250-400 parts of humic acid, 160-200 parts of urea, 120-160 parts of nanometer calcium carbonate, 80-120 parts of mineral slag, 30-60 parts of high viscosity attapulgite clay powder, 8-20 parts of Azotobacter chroococcum, 800-1200 parts of a binder and 10-14 parts of a microbial fermentation agent. The above scientific and reasonable formula of the humic acid slow release fertilizer suitable for long-term improvement of secondary salinization land is obtained through a large amount of experiment researches carried out by the applicant, and the humic acid slow release fertilizer has fertilizing effect slow release and water retention functions, provides nutrient components needed by growth of plants, keeps no loss of nutrient components in a powdery saline and alkaline land water retention slow release fertilizer, and is in favor of realizing normal growth of the plants.

Description

technical field [0001] The invention relates to a humic acid slow-release fertilizer suitable for long-term improvement of secondary saline-alkali land. Background technique [0002] Soil secondary salinization, also known as "secondary salinization", refers to the process of turning good cultivated land into "salinization" due to unreasonable cultivation and irrigation measures and changes in vegetation. It mainly occurs in my country's North China Plain, Songliao Plain, Hetao Plain, Weihe Plain and other places. There are three main reasons for the formation of secondary salinization: First, the drainage system of farmland is not smooth, and a large amount of water diversion irrigation has raised the groundwater level, increased the speed of groundwater moving upward through the soil capillary and the evaporation of groundwater, thereby increasing the groundwater and the lower level. The salt in the soil accumulates to the surface. Second, unreasonable irrigation destroys...

AI Technical Summary

Problems solved by technology

Low-solubility slow-release fertilizers can be produced with ordinary disc or drum granulation equipment. The cost of the production process is low, and the price of fertilizers is low. However, the controlled-release performance of low-solubility slow-release fertilizers is poor, and the slow-release effect of fertilizers is often not ideal.