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Effect of different cropping patterns on potato yield and fertilizer use efficiency
Author(s): 
Pages: 1802-1806
Year: Issue:  10
Journal: Acta Agriculturae Zhejiangensis

Keyword:  potatocropping patternyieldfertilizer use efficiency;
Abstract: 为探讨马铃薯的合理栽培模式,在青海省乐都县开展马铃薯不同栽培模式田间试验,其中,农户模式N和P2O5肥料用量分别为238.5和345.0 kg·hm-2,不施钾肥,春季露地人工播种;现有模式中N,P2O5和K2O肥料用量分别为240.0,210.0和150.0kg·hm-2,春季人工起垄覆膜、播种;创新模式中N,P2O5和K2O肥料用量分别为180.0,157.5和112.5 kg·hm-2,春季机械起垄覆膜、播种,对比不同模式下马铃薯产量、养分含量及肥料利用率.结果表明,创新模式中马铃薯产量与经济效益最高,产量达35 670 kg·hm-2,毛收入52 078元·hm-2,与农户模式间差异显著;创新模式中作物养分积累量最高,且合理施肥促进了氮磷钾向块茎的转移,提高了养分利用率,氮磷钾的偏生产力也较高,尤其是磷和钾,超过了200 kg· kg-1.综合来看,该创新模式是适合青海浅山地区马铃薯种植栽培的最佳模式.
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