[Spatial heterogeneity of soil moisture after raining at forest-grassland landscape boundary in hilly area of Loess Plateau].
Soil moisture is a main factor limiting vegetation restoration in semi-arid region. In this paper, the spatial variability of different layers soil moisture after raining at the forest-grassland boundary in hilly area of Loess Plateau were studied by traditional and geostatistical analysis methods. The results showed that the moisture content in surface (0 - 10 cm) and subsurface soil layer (10 - 20 cm) of grassland was higher than that of forestland. The two layers soil moisture content at forest-grassland boundary showed a small variation but an obvious ecological distribution. By using moving split-window techniques, it was obtained that the width of edge influence in surface and subsurface layer was 8 and 6 m, respectively. Geostatistical analyses showed that the spatial distribution of two layers soil moisture had a pure nugget effect in grassland, linear model in forestland, and spherical model in forest-grassland boundary. The spatial heterogeneity of two layers soil moisture was higher at forest-grassland boundary than at forestland and grassland, which had a stronger spatial dependence and autorelation. Kriging maps expressed the spatial structural characters. The distribution of soil moisture in two layers showed a strip shape near forest edge, and a patch shape far from the edge.
You
Wenzhong
W
Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China. wzhyou2002@163.com
Zeng
Dehui
D
Liu
Mingguo
M
Song
Xide
X
Ye
Yaohui
Y
Zhang
Yong
Y
D002681:China; D004784:Environmental Monitoring; D006109:Poaceae / Q000254:growth & development*; D011891:Rain; D012987:Soil / Q000032:analysis*; D014197:Trees / Q000254:growth & development*; D014867:Water / Q000032:analysis*
D012987:Soil; D014867:Water