采用“3414”完全设计试验方案，进行了山丹县马铃薯配方施肥试验，建立了马铃薯产量与N、P、K肥之间的回归方程，得出山丹县主产区马铃薯最大施肥量为N 242.99 kg/hm2、P2O5 159.27 kg/hm2、K2O 159.03 kg/hm2，该施肥水平下马铃薯产量为48 934.00 kg/hm2；最佳施肥量为N 224.61 kg/hm2、P2O5 149.06 kg/hm2、K2O 146.80 kg/hm2，该水平下马铃薯产量为48 816.00 kg/hm2，N、P2O5、K2O配比为1∶0.66∶0.65。

In this study, the tests of formulated fertilization for potato in main producing areas of Shandan were conducted by application of the method of “3414” complete design test. The regression equation between potato yield and application amounts of N, P, K was established， and the maximal application amounts of N, P, K were obtained. The amounts of N， P， K were N 242.99 kg/hm2, P2O5 159.27 kg/hm2, K2O 159.03 kg/hm2 , respectively. Under the fertilizer level, potato yield was 48 934.00 kg/hm2. Additionally, the optimal application amounts of N, P, K were also found. The optimal application amounts of N, P, K were N 224.61 kg/hm2， P2O5 149.06 kg/hm2， K2O 146.8 kg/hm2， respectively . Under this fertilizer level, potato yield was 48816.00 kg/hm2 and the ratio of N， P2O5， K2O should be 1:0.66:0.65.

S532