荔浦芋生产肥力主因子分析

对荔浦芋产量与13个土壤养分指标进行了主因子分析。结果表明:荔浦芋产量与全氮、有效氮以及有机质极显著负相关,与有效锌、有效铁、有效铜、有效硼极显著正相关。从土壤养分中提取出了4个主因子,第1主因子主要由全磷、全钾、有效磷以及有效锰决定;第2主因子是全氮、有效氮、有机质的综合反映;第3主因子主要由有效锌、有效铜、有效硼决定;第4主因子主要反映了pH、有效钾、有效铁3个肥力养分指标。其中第2主因子对产量影响最大,与产量的相关系数为-0.651**。对荔浦芋产量与主因子进行回归分析,得到主因子回归方程:y=-0.651×Z2-0.187×Z4。控制无机氮肥的施用,增施有机肥,在施加碱性肥料的同时,补充叶面微肥,有利于产量的提高。

Principle Factor Analysis of Lipu Taro Production

The principal factor analysis was used to analyze soil nutrient indices affecting Lipu Taro yield.The results showed that Lipu Taro was significantly and positively correlated with total N,available N and organic matter,significantly and negatively with available Zn,Cu,Fe and B.The first principle factor was characterized by total P,total K and available P;the second principle factor by total N available N and organic matter;the third principle factor by available Zn,Cu and B;the fourth principle factor by pH,available K and Fe.The correlation coefficient between Lipu Taro yield and the second principle was-0.651**,which affect the yield mostly.The regression equation among Lipu Taro yield and principle factors was y=-0.651×Z2-0.187×Z4.Therefore,reducing inorganic nitrogenous fertilizer in soil and increasing alkaline fertilizer and foliar fertilizer are in favor of Lipu Taro yield.