赤红壤地区不同熟化程度旱地理化特性及酶活性差异研究  

Differences of dry land soil physico-chemical properties and enzyme activity under different maturation degree in lateritic red soil area

作　　者：许欢[1] 周波[1] 张池[1] 陈旭飞[1] 杨小雪[1] 代金君 赵肖榕 戴军[1] 

机构地区：[1]华南农业大学资源环境学院/国土资源部建设用地再开发重点实验室/广东省土地利用与整治重点实验室/农业部耕地保育重点实验室,广东广州510642

出　　处：《广东农业科学》2014年第9期79-82,共4页Guangdong Agricultural Sciences

基　　金：国土资源部公益性行业科研专项(201011006)

摘　　要：以华南典型赤红壤地区近5年内的新垦旱地和普通旱地为研究对象,采用非对称T检验及主成分分析等研究方法,探讨了不同熟化程度下旱地理化及酶活性的差异。结果表明:新垦旱地土壤pH显著低于普通旱地0.61个单位(P=0.02);与普通旱地相比,新垦旱地土壤有机质、全氮、全磷、碱解氮及速效磷含量分别显著降低31.05%、44.13%、55.97%、49.68%和74.94%;新垦旱地土壤过氧化氢酶及脲酶活性显著低于普通旱地,而蔗糖酶和磷酸酶则差异不显著;主成分分析结果显示:普通旱地和新垦旱地土壤理化及酶活性综合差异达极显著水平,相关分析结果显示:土壤酶活性与主要肥力指标密切相关。In order to explore the physical, chemical and enzyme differences of soil with different maturation degrees,new cultivated（last five years） and ordinary dry land were studied in the lateritic red soil region of southern China, and asymmetric T-test and principal component analysis were used. The results showed that the pH value of new cultivated dry land was significantly lower than ordinary by 0.61 units（P =0.02）; New cultivated dry land significantly decreased by31.05%, 44.13%, 55.97%, 49.68% and 74.94% in soil organic matter, total nitrogen, total phosphorus, nitrogen and available phosphorus contents compared to ordinary dry land; New cultivated dry land had significantly lower soil Catalase and Urease activity than ordinary, while their invertase and phosphatase were not significantly different. Principal component analysis showed that comprehensive difference of the physical, chemical and enzyme index was significant between the ordinary and new cultivated dry land. Correlation analysis showed that soil enzyme activity and fertility indicators were closely related.

关 键 词：熟化程度 赤红壤 理化特性 酶活性 

分 类 号：S151.9[农业科学—土壤学]