【摘要】 1999年在威宁县布置的马铃薯田间试验 ,目的是探索适当的氮磷钾配比和用量 ,为马铃薯平衡施肥提供依据。试验表明 ,氮磷钾与有机肥配合施用较农民习惯施肥有极显著的增产增收效益。配方施肥较农民习惯施肥可增产 6 .6 3t/ hm2 ,增幅 34.82 % ,肥料产出投入比达 5.17,增产增收效益十分显著。建议在相似的土壤条件下适宜的 N∶ P2 O5∶ K2 O为 10 0∶ 58∶ 14 4。更多还原

【Abstract】 The rational ratio and suitable amount of NPK fertilizers was analysed so as to provide basic data for balanced fertilization on potato in Weining County of Guizhou. The field experiment showed that there were very significant effect on potash and phosphate application and significant effect on organic manure application. Phosphate had very high effect on increasing potato yield to 6.63 t/ha corresponded to 34.82% of potato yield to be increased by balanced fertilization than farmers’ practice, and benefit cost rate is 5.17. So that potato yield will significantly increased by NPK balanced fertilization. The suitable ratio of N∶ P 2O 5∶ K 2O is 100∶58∶144.更多还原