| The effect of water-solubility Potassium-polyacrylate-polypropyleneacylamine Polymer on increasing the content of available nitrogen of soil was studied.The results showed that the content of soil water diffuse increased with time on different lay with water-solubility Potassium polyacrylate-polypropylene-acylamine Polymer treatment,which retains soil water in small scope;Potassium-polyacrylate-polypropylene-acylamine Copolymer adsorbs the nitrogen dissolving in water,thereafter transfuses it in soil.This lead to that nitrogen in solution diffuses under restricted condition,which greatly increases the content of available nitrogen. |