三江源区高寒草甸土壤呼吸空间异质性的研究  

Study on spatial heterogeneity of soil respiration of alpine meadow in the Three-river headwater region

作　　者：邹华[1] 畅喜云[2] 德科加[3] 石红霄[4] 杨予海[2] 范月君[2,4] 

机构地区：[1]青海省草原总站,西宁810000 [2]青海畜牧兽医职业技术学院,青海湟源812100 [3]青海省畜牧兽医科学院,西宁810003 [4]中国农业科学院草原研究所,呼和浩特010010

出　　处：《黑龙江畜牧兽医》2014年第11期117-119,共3页Heilongjiang Animal Science And veterinary Medicine

基　　金：农业部公益行业(农业)科研专项(201203007);青海省自然科学基金项目(2012-Z-941Q)

摘　　要：为了研究三江源区高寒草甸土壤呼吸变异特征,试验采用野外调查和密闭气室法,测定了三江源区土壤有机碳和土壤呼吸指标,并应用地统学软件Surfer和Variowin进行了分析。结果表明:土壤有机碳和土壤呼吸率分别为10.28 g/kg,5.41μ·mol/(m2·s),变异系数为0.28,0.21;土壤呼吸和土壤有机碳间线性相关,且存在半方差结构,样区空间异质性和结构因素二者共同起主导作用;土壤呼吸和有机碳变程分别为80.92 m和76.53 m,差异范围不大,二者在相同的尺度上起作用,表现分布不连续,具有明显的斑块不均匀分布,进一步证实了青藏高原高寒草甸生态系统的脆弱性。To study the variation characteristics of soil respiration of alpine meadow in the Three - river headwater region, the field investigation and the closed chamber method were used to determine the soil organic carbon and soil respiration index in the Three - river headwater region. Meanwhile, the geostatistical software Surfer and Variowin were used for the analysis. The results showed that the soil organic carbon and soil respiration rates were 10.28 g/kg and 5.41 μ· mol/（ m2 ·s）, respectively, and the coefficients of variation were 0.28 and 0.21 respectively; linear correlation was exhibited between soil respiration and soil organic carbon, and the semi - variance structure was existed between them. Moreover, both spatial heterogeneity and structure factors played a leading role together in the sampling region ; the ranges of soil respiration and organic carbon were 80.92 m and 76.53 m respectively, and their differences were limited. Both played a rele in the same scale, showing dis- continuous distribution, there was uneven distribution of obvious plaques. This further confirmed the fragility of the Qinghai - Tibet plateau al- pine meadow ecosystem.

关 键 词：土壤呼吸 土壤有机碳 空间异质性 高寒草甸 三江源区 

分 类 号：S812.3[农业科学—草业科学]