氮磷钾配施对木薯产量和淀粉含量的效应研究

Effects of N, P, K Combined Application on the Yield and Quality of Cassava

以华南8号木薯为研究对象,通过311三元二次D-最优饱和试验设计试验,探讨N、P、K配施对木薯产量和品质的影响。在此立地条件下,可获得最大的鲜薯产量为46.62 t/hm2,此时对应氮、磷、钾施肥量分别为167.13、26.51、179.82 kg/hm2。单因子效应分析表明,氮、磷、钾对木薯产量的影响以钾肥最大,氮肥次之,磷肥最小。双因子互作效应分析结果表明,N、K双因子之间的交互效应最大,N、P二因子之间的交互效应不明显,P、K与木薯产量的效应小于N、K效应,大于N、P效应;按三元二次D-最优饱和试验设计氮、磷、钾配施对木薯淀粉含量和干物率的影响不显著。

The effects of N,P,K fertilizer on the yield and quality of Cassava SC8 were explored with ternary quadratic D-optimal saturated design experiment（311）.In this site conditions,the maximum root yield of cassava was 46.62 t/hm2,and the nitrogen,phosphorus and potassium fertilizer were 167.13,26.51,179.82 kg/hm2.Single factor effect analysis showed that nitrogen,phosphorus and potassium were affected the yield of cassava,the effects of N,P and K on the yield followed the order：K＞N＞P.Two-factor interaction effects analysis showed that the effects of N,K two-factor interactions on the yield of cassava was the biggest,N,P interaction between the two factors was not obvious,and the effect of P,K on the yield of cassava was less than N,K effect,greater than N,P effect.Using D-quadratic optimal experimental design saturated nitrogen,phosphorus and potassium fertilizer on cassava starch and dry matter content of the impact was not significant.