影响水稻土肥力水平的主要指标筛选

Selection to the Main Evaluation Index of Paddy Soil Fertility

根据对５省２０个水稻土样的测定结果，运用主成分分析的方法，对影响水稻土肥力水平的主要指标进行了筛选，确定出有效铁、有效锰、物理性砂粒、粘粒、细粉粒、田间持水量、脲酶和过氧化氢酶８项指标为影响水稻土肥力水平的主要指标。运用这８项指标可对水稻土的肥力状况进行客观的评价。

Based on measurement results of 20 paddy soil samples that were from 5 provinces, the main component analysis was employed to study paddy soil fertility. Available Fe, Mn, Physical sand, fine silt, clay, field capacity, urease and hydrogen peroxidase as main indexes were selected. The objective evaluation of paddy soil fertility were done by use of the eight indexes.