冬小麦磷肥利用率主要影响因素的研究

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。

Major factors influencing phosphorus use efficiency of winter wheat

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