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作 者 ：蔡开地

期 刊 ：植物营养与肥料学报 2004年 10卷 1期 页码：73-77

关键词：结球甘蓝；平衡施肥；氮肥分期施用；效应函数；

Keywords:headed cabbage, balanced fertilization, N ratio of split application, effect function,

摘 要 ：应用311-A拟饱和最优回归设计和{3,2}单形格子饱和设计,通过氮磷钾肥配比和氮肥分期施用田间试验,建立结球甘蓝施用氮磷钾肥对经济产量、施肥利润及氮肥分期施用比例的效应函数。寻优结果表明,结球甘蓝最高产量的氮、磷、钾优化施肥组合为N277.83、P₂O₅.64.59和K₂O126.53kg.hm²,其最高经济产量达73.877t.hm²;最佳施肥利润的氮、磷、钾优化施肥组合为N267.15、P₂O₅.62.63和K₂O121.56kg.hm²,其最佳施肥利润达46085.87元.hm²,经济产量为73.786t.hm²;较佳施氮分配比例为基肥∶前期追肥∶后期追肥为0.3840∶0.3554∶0.2606,其对应的氮肥用量分别为N106.75、98.80和72.45kg.hm²,期望较高的经济产量可达74.946t.hm²。

Abstract:The effect functions of NPK application on economical yield, fertilization benefit and N ratio of split application at different growing periods of headed cabbage(Brassica oleracea var. capitata) were studied by the field experiments with 311-A best regression design of supposed saturation and {3, 2} saturated design of single shape check. The results showed that the best NPK application of headed cabbage with maximum economical yield of 73.877 t/hm² was N 277.83, P₂O₅ 64.59 and K₂O 126.53 kg/hm², the best NPK application with the best fertilization benefit of 46085.87 yuan/hm² and higher economical yield of 73.786 t/hm² was N 267.15, P₂O₅ 62.63 and K₂O 121.56 kg/hm², and better ratio of N split application as basal dressing, and former and latter topdressing for higher expecting economical yield of 74.946 t/hm² was 0.3840∶ 0.3554∶ 0.2606, and the N rates were 106.75, 98.80 and 72.45 kg/hm², respectively.

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