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作 者 ：宋春凤;徐坤

期 刊 ：植物营养与肥料学报 2004年 10卷 2期 页码：167-170

关键词：芋头；氮；钾；产量；品质；

Keywords:taro (Colocasia esculenta), fertilization, nitrogen, potassium, yield, quality,

摘 要 ：采用二次饱和D-最优设计,研究了氮钾肥配施对芋头产量和品质的影响,并建立了以氮、钾肥施用量为变量因子,芋头产量和品质为目标函数的二元二次数学模型。模型解析表明,氮、钾肥对芋头产量和品质均有显著影响,且钾肥的影响大于氮肥;氮、钾肥之间存在显著的交互效应。在氮(N)、钾(K₂O)施用量分别为261.75kg/hm²、757.50kg/hm²以内,产量随施肥量的增加逐渐提高,超过此施用量,则产量下降。在本试验条件下,施肥量为N34.5～531.0kg/hm²,K₂O.526.8～1057.2kg/hm²,芋头产量可达30000kg/hm²以上。

Abstract:The effects of nitrogen and potassium on yield and qualities of taro were studied with the design of double saturated D-optimal regression. According to the data obtained, a mathematical model was established; in which N and K applied were independent variables, taro yield and quality were dependent variables. The models analysis showed that taro yield and qualities were influenced largely by nitrogen, potassium and their interaction; and potassium had heavier effect than nitrogen. Within the extent of N 261.75kg/hm²、K₂O 757.50kg/hm², yield increased with the increase of fertilizer, over-rate the yield decreased. The most suitable amounts of fertilizer for over 30000 kg/hm² yield of taro were N 34.50～531.00(kg/hm²), K₂O 526.80～1057.20kg/hm² under this experimental conditions.

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