FACE条件下休闲和秸秆还田对稻麦轮作农田麦季土壤酶活性的影响  

Response of Soil Enzyme Activity to Elevated Atmospheric pCO_2 at Fallow and Straw Amendments in Wheat Season of a Rice/Wheat Rotation Ecosystem

作　　者：周仕栋[1,2] 谢祖彬[1] 朱建国[1] 刘钢[1] 孙会峰[1,2] 卑其成[1,2] 刘金山[1,2] 

机构地区：[1]土壤与农业可持续发展国家重点实验室(中国科学院南京土壤研究所),南京210008 [2]中国科学院研究生院,北京100049

出　　处：《土壤》2010年第2期243-248,共6页Soils

基　　金：国家自然科学基金项目(40871146;40571157);科技部国家科技支撑项目(2008BAD95B05);农业部公益性行业专项(200803033);江苏省自然科学基金项目(BK2006252)资助

摘　　要：利用中国唯一的江都FACE(Free-airCO2 enrichment,开放式空气CO2浓度升高)平台,研究了大气CO2浓度升高下休闲(fallow,不种作物,但翻耕和施肥与其他处理相同)和秸秆还田对土壤脱氢酶、β-葡萄糖苷酶、转化酶、芳基硫酸酯酶和荧光素二乙酸酯水解(FDA)的影响。研究结果表明:大气CO2浓度升高对于休闲土壤酶活性没有影响。在没有秸秆还田的情况下,大气CO2浓度升高刺激了土壤中脱氢酶、β-葡萄糖苷酶、转化酶、芳基硫酸酯酶的活性和FDA水解,增加幅度分别达到了14.88%、19.41%、11.69%、17.12%和4.47%。除转化酶外,秸秆还田使土壤酶活性增加。随着秸秆还田量的增加,FACE效应先增加后消失。In this paper a FACE （free air carbon dioxide enrichment） experiment with 4 kinds of soil managements （fallow, 0 organic matter amendment （Ores）, 50% harvested straw amendment （0.Sres） and 150% harvested straw amendment （1.5res）） was conducted to investigate the responses of soil enzyme activities. Results showed that elevated COz had no effect on fallow soil. Straw amendment increased the activities of soil dehydrogenase, J3-glucosidase, arylsulphatase and FDA hydrolysis. With no straw amendment elevated CO2 concentration increased the activities of soil dehydrogenase, β-glucosidase, arylsulphatase, invertase and FDAhydrolysis by 14.88%, 19.41%, 17.12%, 11.69% and 4.47% respectively. FACE effect increased firstly then disappeared with the increase of straw amendments.

关 键 词：大气CO2浓度升高 FACE 土壤酶活性:休闲 秸秆还田 

分 类 号：Q143[生物学—生态学] S154.1[生物学—普通生物学]