【摘要】 1992-2003年12a间,对2个木薯品种(华南205和华南124),进行氮、磷、钾和火烧土等4种肥料各4个不同施肥水平组成共16个施肥配方的试验,研究了长期施肥对木薯农艺性状、鲜薯产量和淀粉质量分数的影响。结果表明:淀粉质量分数与收获指数呈显著正相关,鲜薯产量与株高、茎径及单株结薯数呈极显著正相关,单株结薯数与株高、茎径呈极显著正相关,株高与茎径呈极显著正相关。并列出它们的相关回归方程。推荐木薯最佳N,P2O5,K2O的施肥质量配比为2~4:1:2~4,其中,N,P2O5,K2O的施肥质量配比在连作初期以2:1:2为佳,而连作后期则以逐渐过度为4:1:4为佳。更多还原

【Abstract】 Research was carried out on fresh cassava yield,starch content and 6 agronomic characteristics in the long-term fertilizer application trial by using correlation analysis and regression equation.Starch content was significantly correlated with the rate of root and whole plant.Fresh yield was very significantly correlated with plant height,diameter of stem and roots per plant.Roots per plant were very significantly correlated with plant height and diameter of stem. Plant height and diameter of stem were very significantly correlated.N :P2O5 :K2O=2-4 :1 :2-4 was the optimum rate for cassava fertilizer application.更多还原