[Spatial variability characteristics of soil organic carbon and nitrogen reveal typical alpine meadow degradation on Qinghai-Tibetan Plateau].
The principle of geo-statistics method was used to analyse the spatial heterogeneity of soil organic carbon and total nitrogen (0-10 cm) of alpine meadow of the Qinghai-Tibetan Plateau. The results show that the mean contents of soil organic carbon and total nitrogen at depth 0-10 cm are 11.45 g x kg(-1) and 1.02 g x kg(-1), 0.23 and 0.21 of co-variation coefficient, respectively. As mentioned above all factors reflect oligotrophic condition of soil fertility at this habitat. Organic carbon and entire nitrogen of soil random factor dissociation take up mutant proportion of general space heterogeneity being 44.7% and 49.9% respectively. Mutant dimension is 210.9 m and 200.1 m respectively. The soil organic carbon and the entire nitrogen show on the research territory vacates to oneself the factor to be bigger than machine the factor the different pattern. On space structure dissociation, from inherent attribute of soil, if space such as soil mineral substance, land form is certainly relevance, the factor and the artificial factor play role if the random factors that be trampled on to soil super crust arouses such as grazing and engineering construction is common, Medium memorial level affecting degree.
Li
Yuan-Shou
YS
Chinese Academy of Meteorological Sciences, Beijing 100081, China. yshli@lzb.ac.cn
Zhang
Ren-He
RH
Wang
Gen-Xu
GX
Zhao
Lin
L
Ding
Yong-Jian
YJ
Wang
Yi-Bo
YB
D000531:Altitude; D002244:Carbon / Q000032:analysis*; D002681:China; D017753:Ecosystem; D004784:Environmental Monitoring; D009584:Nitrogen / Q000032:analysis*; D009930:Organic Chemicals / Q000032:analysis*; D006109:Poaceae; D012987:Soil / Q000032:analysis*
D009930:Organic Chemicals; D012987:Soil; D002244:Carbon; D009584:Nitrogen