【摘要】 采用三因素最优回归设计方案研究了金丝小枣两种树龄氮、磷及钾的最佳经济施用量和配合比例。结果表明:初龄结果枣树钾肥效应不显著,最佳经济施用量为每株纯氮24.6g,P₂O₅17.3g,配合比例为1.0:0.70;适龄结果枣树氮、磷、钾的最佳施用量为每株纯氮0.48kg,P₂O₅0.24kg,K₂O,0.35kg,配合比例为1.0:0.51:0.73。更多还原

【Abstract】 Microplot experiments were set up for studying optimum and economical quan- tity of nitrogen,phosphorus and potassium fertilizer on jujube tree.For young jujube tree,K fertilizer did not show any significant effect on its yield.Nitrogen and phosphorus quantity for obtaining high yield and net income would respectively be N 24.6 g and P₂O₅ 17.3 g（thus 1:0.70 of N:P₂O₅）for each tree.However,N 0.48 kg,P₂O₅ 0.24 and K₂O 0.35 kg（thus 1:0.51:0.73 of N:P₂O₅:K₂O）should be applied in each middle age tree in order to achieve high yield and net income.更多还原