翻压不同绿肥品种对植烟土壤肥力及酶活性的影响

为了明确不同绿肥品种与土壤肥力及酶活性的关系,通过田间试验及简单相关分析、典型相关分析和主成分分析,研究种植翻压不同品种绿肥对植烟土壤酶活性及土壤肥力的影响。结果表明,不同品种绿肥种植翻压均可显著改善土壤的物理性状,提高土壤养分含量和土壤酶活性,在效应上具有相似的特点,主要影响土壤脲酶、过氧化氢酶与酸性磷酸酶活性及碱解氮和有效磷的含量,主要差异是土壤体积质量、孔隙度、pH、有机质、全氮、速效钾、过氧化氢酶的变化;脲酶、酸性磷酸酶、蔗糖酶、过氧化氢酶4种土壤酶不仅两两之间均呈极显著正相关,而且与土壤肥力指标均呈极显著相关;土壤肥力与土壤酶活性存在极显著的典型相关关系;此结果对当前的烤烟生产和土壤改良具有较大的意义。

Effects of Different Green Manure Varieties on Enzyme Activities and Fertility of Tobacco-planting Soils

Aim to study the relation between green manure varieties and the activity of soil enzymes and soil fertility, correlation analysis, canonical correlation analysis and principal component analysis were used in this paper to study the effects of returning different green manures on soil enzyme activities and fertility on the basis of a field experiment. The results showed that the returning green manures obviously increased soil enzyme activities, soil nutrients and physical properties, with similar characteristics in effects, mainly influenced the activities of soil urease, catalase and acid phosphatase, and influenced the contents of alkaline hydrolysis nitrogen and phosphorus, while mainly differed in the changes of soil bulk density, porosity, pH, organic matter, total nitrogen, available potassium and hydrogen peroxide enzyme activity. There are significant positive correlations between soil edaphic physicochemical factors and activities of soil urease, acid phosphatase, invertase and catalase, while there are also high significant positive canonical correlations between soil fertility and soil enzyme activity. The results are of great importance to the tobacco production and soil improvement nowadays.