What are the applications of polyacrylamide in agriculture?
1, water retention: the addition of PAM in the soil can increase the soil moisture content, inhibit the formation of soil crust, and increase water intrusion. PAM can increase water intrusion, increase soil moisture content, and maintain soil water content for a period of time after rainfall or irrigation. The greater the application amount of PAM, the better the water retention effect, but when the application amount is too large, it will have the opposite effect. It is generally recommended to apply 3-12KG/K㎡.
2, fertilizer protection: PAM can also affect the adsorption of soil on fertilizer, PAM by stabilizing water to stabilize the aggregate structure and the adsorption of fertilizer elements, inhibit the loss of fertilizer elements, improve the utilization rate of fertilizer. The contents of soil, organic matter, available phosphorus, available potassium and available nitrogen were obviously increased after PAM treatment. A large number of practices have proved that the use of PAM can improve fertilizer efficiency by 25%- 60%.
3, insulation effect: the application of PAM soil, water is absorbed by the network structure, free water is reduced, the conductivity of the soil is reduced, the temperature of the soil is low during the day, the night is high, the daily temperature difference is reduced, and the growth of crops is used.
4, the effect of increasing production: the application of PAM enhances the water retention and fertility of the soil, enhances the soil aggregate structure, improves the soil permeability and drought resistance, improves the soil environment, provides a relatively superior environment for the growth and development of crops, and significantly improves the crop yield. The experiment showed that the wheat yield could be increased by 9% by spreading PAM at 18KG/K㎡.
