水稻长效除草复合肥由沈阳市兴农生物技术研究所和化工部沈阳化工研究院联合研制的水稻长效除草复合肥（也叫水稻一次灵），最近被列为国家级产品。该肥含有氮、磷、钾、钙及微量元素，可以全面合理地提供水稻所需营养并延长氮肥有效期，消除水田杂草，促进秧苗生根分蘖、... Rice long-term weeding compound fertilizer by the Shenyang City Xingnong Biotechnology Research Institute and the Shenyang Chemical Research Institute of Chemical Industry jointly developed rice long-term weeding compound fertilizer (also called rice once spirit), has recently been classified as national product. The fertilizer contains nitrogen, phosphorus, potassium, calcium and trace elements, can fully and rationally provide the nutrients needed by rice and prolong the effective period of nitrogen fertilizer, eliminate paddy field weeds, and promote rooting and tillering of seedlings.