有机无机肥配施对小麦吸收氮磷及土壤肥力的影响

￣（１５）Ｎ示踪试验表明，有机无机肥配施促进了有机叉的矿化和小麦对有机氮的吸收利用，基施氮肥主要用于营养器官的形成，返青追肥主要用于生殖器官的形成。有机无机氮肥配施提高了总氮生产效率。配施处理小麦对磷素的吸收总量稍高于单施无机氮肥处理，磷素在籽粒中的分配率稍低于单施无机氮肥处理是导致磷素生产效率下降的重要因素。有机无机肥配施提高小麦产量的同时也培肥了地力，是小麦高产稳产的重主措施之一

EFFECT OF ORGANIC AND INORGANIC FERTILIZER APPLIEDTOGETHER ON N AND P ABSORPTION AND SOIL FERTILITY

N trace experiments show that organic and inorganic fertilizer applied together promotes organic N mineralization and absorption. Base fertilizer is mainly for nutrition organsand spring fertilizer for reproduction organs. Organic and inorganic fertilizer applied to-gether obtained the highest production efficiency of total N. Total P amount in wheat plant isslightly bigber than that of inorganic N applied ouly, but P distribution in nutrition organswas slightly lower than that of inorgainc N applied only. Organic and inorganic fertilizer ap-plied together, not only promoted the production but also increased fertility of soil , so it isan important measure for wheat to obtain high production continuously.