生态与农村环境学报2013，Vol.29Issue(3)：329-334,6.
免耕和秸秆还田对小麦生长期内土壤酶活性的影响
Effects of No-Tillage and Straw Incorporation on Soil Enzyme Activity During Wheat Growth
摘要
Abstract
A field experiment was carried out to evaluate effects of conservative tillage on soil enzyme activity following a cropping rotation system of corn and wheat in the Fengqiu National Agro-Ecological Experiment Station,China.The experiment was designed to have 6 treatments or tillage practices,i.e.,tillage for both corn and wheat (CTWT),no-tillage for corn and tillage for wheat (CNTWT),no-tillage for either corn or wheat (CNTWNT),tillage for both corn and wheat with straw incorporated (CTWTS),no-tillage for corn and tillage for wheat with straw incorporated (CNTWTS) and no-tillage for either corn or wheat with straw incorporated (CNTWNTS).Results show that Treatment CNTWNT was higher than Treatment CNTWT,Treatment CNTWT was higher than Treatment CTWT,and the treatments with straw incorporated were higher than those without in activities of urease,alkaline phosphatase and invertase in the soil during the entire wheat growing period.Obviously,Treatment CNTWNTS was the highest and Treatment CTWT the lowest.Soil dehydrogenase differed from the other 3 soil enzymes in response.Its activity was higher in Treatment CNTWT than in Treatment CNTWNT in the wheat maturing period,and higher in Treatment CNTWNT than in Treatment CNTWT and in the treatments with straw incorporated than in those without during the other growth periods.The enzymes differed in response to different treatments at different wheat growth stages.Alkaline phosphatase tended to be low in activity at the seedling stage,peaked at the booting stage and went down at the maturing stage; invertase soared up at the elongation stage and then declined; soil urease tended to be high at the seedling and booting stages; and dehydrogenase increased steadily throughout the whole growth period and peaked at the maturing stage.Correlations between the four soil enzymes all remained at a significant level.Cluster analysis further indicates that the 6 treatments could be sorted into three groups according to the enzyme activity level in the soil as a whole.Treatment CNTWNTS is the highest in enzyme activity,demonstrating that the practice can quite well improve soil enzyme activity.关键词
免耕/秸秆还田/玉米-小麦轮作/土壤酶活性Key words
no-tillage/straw incorporation/wheat-corn rotation/soil enzyme activity分类
农业科技引用本文复制引用
路怡青,朱安宁,张佳宝,陈效民,舒馨..免耕和秸秆还田对小麦生长期内土壤酶活性的影响[J].生态与农村环境学报,2013,29(3):329-334,6.基金项目
国家重点基础研究发展计划(2011CB100504) （2011CB100504）
中国科学院知识创新工程重要方向项目(KZCX2-YW-JS408) （KZCX2-YW-JS408）
国家自然科学基金(41071150) （41071150）
公益性行业(农业)科研专项(201203030) （农业）
