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《Grassland and Turf》 2008-01
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Study on CO_2 emission from 'black soil beach' degraded meadow in source area of Yellow River

KONG Zheng1,2,LONG Rui-jun3,4,SUN Bu-gong2,SHANG Zhan-huai3,FENG Rui-zhang4,LI Qiu-na2(1.Anhui Agricultural University,Hefei 230036,China;2.Faculty of Grassland Science,Gansu Agricultural University,Lanzhou 730070,China;3.College of Pastoral Agriculture Science and Technology,Lanzhou University,Lanzhou 730020,China;4.Northwest Institute of Plateau Biology,Chinese Academy of Sciences,Xining 810008,China)  
A primary study on CO2 emission from 'black soil beach' degraded meadow was carried out in the source area of Yellow River by using static chamber-GC method.The results indicate that the rates of CO2 emission of the three different treatments of 'black soil beach' degraded meadow i.e.the total respiration rate of soil-plant system(BC),soil respiration rate and soil microbial respiration rate(FL) were similar.They all had the evident characteristics of 'unimodal curve',and the rate of CO2 emission in the daytime was greater than that in the night;Seasonal dynamics of the rate of CO2 emission were pretty distinct,and the trend of three different treatments was consistent.In addition,there was a very significant correlation relationship between soil temperature in depth 5 cm and the total respiration rate from the soil-plant system of 'Black soil beach'degraded meadow(P0.01),and a significant correlation relationship between soil microbial respiration rate and water content in soil depth 0~10 cm(P0.05).
【CateGory Index】: S812
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