通过“3414”田间试验，建立了天水市山旱地马铃薯产量(Y)与N、P、K肥之间的回归方程，得出马铃薯最佳施肥量为尿素445.9 kg/hm2、重过磷酸钙108.7 kg/hm2、硫酸钾554.4 kg/hm2，此条件下马铃薯产量为 24 822 kg/hm2。

A field experiment was conducted in hill dryland of Tianshui city to study the effect of fertilization on N、P、K， the potato yield(Y) and N， P， K fertilizer between the regression equation was established in hill dryland of Tianshui city， obtained the optimum fertilization of potato urea was 445.9 kg/hm2， resume phosphate calcium was 108.7 kg/hm2， potassium was 554.4 kg/hm2. At this condition， the potato yield was 24 822 kg/hm2.

S532；S147.22

农业部现代农业产业技术体系专项资金(CARS-10)资助