冬小麦磷肥利用率主要影响因素的研究  

Major factors influencing phosphorus use efficiency of winter wheat

作　　者：李云[1] 张宁[2] 邢文英[3] 

机构地区：[1]河北省廊坊市农林局,河北廊坊065000 [2]中国农业科学院土壤肥料研究所,北京100081 [3]农业部优质农产品开发服务中心,北京100020

出　　处：《植物营养与肥料学报》2002年第4期424-427,共4页Journal of Plant Nutrition and Fertilizers

基　　金：河北省自然科学基金项目(397395)资助。

摘　　要：在大量田间试验及土壤、植株分析测定基础上,建立影响磷肥利用率的各个主要因子变化规律的函数模型,从动态的角度研究影响磷肥利用率各因素之间的关系。结果表明,施磷量越大,磷利用率越低;土壤速效磷高,磷的利用率也低。只有合理地搭配氮肥、钾肥实现平衡施肥,才能使磷的利用率达到一个较高的水平。A model describing the dynamic change of the major factors influencing phosphorus use efficiency was established based on a number of field experiments and soil and plant analysis Thus the interrelationship among these factors could be dynamically defined The results showed that the larger the amount of phosphorus applied, the lower the phosphorus use efficiency; the higher the level of soil available phosphorus, the lower the phosphorus use efficiency Phosphorus use efficiency can attain a higher the level only when phosphorus is applied in balance with nitrogen and potassium

关 键 词：冬小麦 磷肥 影响因素 利用率 

分 类 号：S512.1[农业科学—作物学]