压片法和熔融盐法制备沸石氮肥的养分释放特性

Releasing characteristic of zeolite nitrogen on briquetting and molten station

不同沸石分别与硝酸铵混合压片和硝酸铵熔融盐反应制备沸石氮肥,利用水冲洗和土壤淋溶法对它们的释放特性进行初步评价和比较。发现熔融盐反应制备的沸石氮肥比用压片法制备的沸石氮肥具有更强的抗水冲洗和土壤盐溶液溶解能力,在平稳释放的过程中负载硝酸铵的量也较高。他们以较低的浓度平稳释放,具有一定缓慢释放的效果。

Zeolites reacted with ammonium nitrate in molten station, andmixed with ammonium nitrate to pressure to make zeolite fertilizers individually. Then they were assessed and compared to their releasing characters under the condition of water and soil . The results showed that salt - occlusion fertilizers were slower releasing than briquetfing fertilizers under the condition of water and soil, and could contain higher nitrogen during stable releasing phase. They released low concentration and had slow- release effect.