太湖地区稻麦二熟制下长期秸秆还田对土壤酶活性的影响  

Effect of Long-Term Straw Incorporation on Enzyme Activity in Paddy Soil Under Rice-Wheat Rotation in Taihu Region

作　　者：李腊梅[1] 陆琴[2] 严蔚东[2] 王校常[1] 

机构地区：[1]浙江大学农业与生物技术学院茶学系,杭州310029 [2]中国科学院南京土壤研究所,南京210008

出　　处：《土壤》2006年第4期422-428,共7页Soils

基　　金：973项目"土壤质量标准与可持续利用"(G1999011808)资助。

摘　　要：研究了长期秸秆还田情况下太湖水稻土中与C、N、P、S养分循环及微生物活动有关的荧光素二乙酸酯(FDA)水解酶、酸性磷酸酶、碱性磷酸酶、芳基硫酸酯酶、β-葡糖苷酶、脲酶和脱氢酶等7种酶的活性。结果表明:秸秆还田与无机肥处理都明显增强了所有酶的活性,与对照无肥区的差异达到了显著水平。酶活性对化肥或秸秆还田的敏感度为:β-葡糖苷酶>脱氢酶、脲酶>FDA水解酶、碱性磷酸酶>芳基硫酸酯酶>酸性磷酸酶。各处理间酶活性顺序为:NPKS2(NPK+稻秆4500kg/hm2)>NPKS1(NPK+稻秆2250kg/hm2)>NPK(N120kg/hm2,P75kg/hm2,K150kg/hm2)>CK。Effect of long-term rice straw incorporation on soil enzyme activities in paddy soil under rice-wheat rotation in the Taihu Lake Region of China was investigated. Seven enzymes closely related to soil biological activities and C, N, P and S cycles, i.e., Fluorescein diacetate （FDA）, acid phosphatase, alkaline phosphatase, arylsulfatase, β-glucosidase, urease and dehydrogenase, were selected. Results showed that compared with CK, the treatment with no fertilizer, treatments with chemical fertilizers or rice straw showed significantly enhanced enzyme activities. In terms of sensitivities to rice straw incorporation or chemical fertilizer, the enzymes was in the order of β-glucosidase 〉 dehydrogenase, urease 〉 FDA, alkaline phosphatase 〉 arylsulfatase 〉 acid phosphatase, while in terms of enzyme activity the treatments followed the order of NPKS2 （NPK ＋ rice straw 4500 kg/hm^2） 〉 NPKS1 （NPK ＋ rice straw 2250 kg/hm^2） 〉 NPK （N 120 kg/hm^2 ＋ P75 kg/hm^2 ＋ K 150 kg/hm^2 ） 〉 CK.

关 键 词：水稻土 秸秆还田 土壤酶 

分 类 号：S154.2[农业科学—土壤学]