长期施用不同肥料后土壤对氮磷钾肥的反应张丽慧金绍龄李隆（甘肃省农科院兰州７３００７０）该试验旨在了解定位施肥９ａ后不同肥料组合处理土壤对氮磷钾肥的反应。１材料与方法该研究通过盆栽试验进行。供试土壤采自张掖已定位施肥９ａ（１９８２～１９９０年）的试验地... Response of Long-term Application of Different Fertilizers to N, P, K Fertilizer ZHANG Li-hui, JIN Shao-ling, LI Long (Gansu Academy of Agricultural Sciences, Lanzhou 730070) The purpose of this experiment was to understand the response of different fertilizers to N, P and K fertilization after 9 years of fertilization. 1 Materials and Methods The study was conducted by pot experiment. The test soil was collected from the experimental site of Zhangye that has been fertilized 9a (1982 ~ 1990).