Spatial Variability of Soil Mositure of Melica przewalskyi Community Based on Geostatistics
Soil moisture is the main factors of vegetation pattern formation and development. The spatial heterogeneity of soil moisture have important meaning of understanding the response mechanism of plant environment In arid and semi-arid regions. In this paper, the spatial variability of soil moisture on the north slope of Qilian mountain was investigated based on geostatistical theory and methods. The research was carried out in an degraded grassland of Melica przewalskyi community. The results indicated that the distribution of surface soil moisture was normal distribution. The soil moisture at the 0 ~30 cm soil layer increased with the increase of depth was, on average, 9. 56% ~11.21. The coefficient of variation of the surface soil mositure was 12. 97% ( 0 ~ 10 cm) , 8. 8% ( 10 ~ 20 cm) and 14. 09% (20 ~30 cm) , all belong to a weak variation. There was high degree of spatial heterogeneity of surface soil moisture. Among them 34. 92% ~42. 71% spatial heterogeneity is caused by the spatial autocorrelation part, and the distance of spatial autocorrelation in vegetation coverage was found within distance from 16. 87 ~ 69. 14 m. Soil mositure content of the layer 0-10 cm is affected by coverage. In the 10 - 30 cm,soil mositure content is affected by root.
NETL
NSTL
万方数据
维普
