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采用田间试验方法,研究不同氮磷钾配比对少耕覆盖马铃薯的产量、经济效益和养分利用的影响,比较相同养分管理下传统耕作和少耕覆盖的马铃薯产量、效益和养分利用。结果表明,相同养分用量的少耕覆盖比传统栽培提高马铃薯产量65.33%,净收益高125.63%;在少耕覆盖的模式下,N0P0K0处理的产量和经济效益最低,N2P3K2、N3P2K2和N2P2K3处理的产量和经济效益高;少耕覆盖马铃薯的NPK肥料农学效率和NPK肥偏生产力均随施肥量增加而降低。该试验中,N2P2K2处理的肥料利用效率高和产量效益好,是较佳处理。
Field experiments were conducted to study the effects of different N, P, K ratios on the yield, economic efficiency and nutrient utilization of the under-tillage-covered potatoes. The yield, benefit and nutrient utilization of potatoes under the same nutrient management were compared. The results showed that the yield and economic benefits of N0P0K0 treatment were the lowest with 65.33% of the same yield and 125.63% of the net yield. The yield of N0P0K0 and the lowest economic benefit of the treatments with N2P3K2, N3P2K2 and N2P2K3 And the economic benefit was high. The agronomic efficiency and partial productivity of NPK fertilizers decreased with the increase of fertilizer application. In this experiment, N2P2K2-treated fertilizer has high utilization efficiency and good yield and is the best treatment.