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《Acta Agrestia Sinica》 2011-01
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Soil Respiration of Different Mowing Types of Meadows

GUO Ming-ying1,2,WEI Zhi-jun1,XU Li-jun2,YANG Gui-xia2,LIU Hong-mei1, WU Yan-ling1,XIN Xiao-ping2(1.Inner Mongolia Agricultural University,Hohhot,Inner Mongolia 010019,China;2.Key Lab of Resources Remote Sensing and Digital Agriculture/Hulunber Grassland Ecosystem Observation and Research Station/Institute of Agricultural Resources and Regional Planning of Chinese Academy of Agricultural Sciences,Beijing 100081,China)  
To provide a theoretical basis for research on meadow balance of carbon budget,the effects of 4 different mowing types on soil respiration and soil microorganism are studied by detecting Hulunbeier meadow characters of soil respiration and soil microorganism.Results indicate that mowing influenced the soil respiration,carbon and nitrogen content of microorganism.In the four different mowing years of natural meadows,the highest soil respiration rate appears from noon to 14 p.m.For control areas,the highest value is 4.874 mg·m-2·h-1;in the two years of cutting areas,4.603 mg·m-2·h-1;one year of cutting areas,4.230 mg·m-2·h-1;the three years of cutting areas,the lowest value is 4.154 mg·m-2·h-1.With the increasing years of cutting,the soil respiration rates show a trend of decreasing.The content of microbial carbon,nitrogen,soil enzyme activity(except for urease) and microorganisms,topsoil(0~10 cm;the most active,the largest number),all of them have shown to decrease with soil depth increasing.Microorganism quantities are consistent with soil respiration rates.The highest content of carbon and nitrogen appears in two years cutting areas,and also the other three enzymes(except for urease with irregular activity).The soil respiration rates are positively correlated with microbial carbon,nitrogen,protease,invertase,catalase and microorganisms,but negatively correlated with urease.
【Fund】: 现代农业产业技术体系建设专项资金;; 内蒙古自治区重大科技项目子课题“草甸草原固碳减排管理技术集成与研究示范”资助
【CateGory Index】: S812.2
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