Spatial Heterogeneity of Soil Moisture of Pastures Intercropped inCoconut Plantations in Coastal Sandy Area Hainan Province, China
By the methods of classical statistics and geostatistics, the spatial heterogeneity, distribution, progress and the mechanism of ecology of surface soil (0~20 cm, 20~40 cm and 40~60 cm layers) moisture content of the pastures intercropped in coconut plantations of coastal sandy area were studied. The results showed that in study area, the surface soil moisture content ranged from 3.54% to 10.86%, and showed a weak heterogeneity structure as a whole. The surface soil moisture content of 0~20 cm, 20~40 cm and 40~60 cm layers obeyed normal distribution, and showed a fine semivariogram structure as a whole.Each layer had middle or strong spatial autocorrelation, and more fragmented patches. The spatial distribution of moisture content in 0~20 cm, 20~40 cm and 40~60 cm soil layers, in different planting modes, fitted Gaussian model well. Under different stand conditions, the moisture content in the three soil layers had the similar spatial structure and distribution pattern. Isoline map showed the spatial distribution of moisture content had obvious distribution pattern. Synthesize the ananlysis of semivariogram, sandy-loam soil, micro-physiognomy, human disturbance, and especially vegetation were the most important factors affecting the spatial pattern of soil moisture content in coconut plantations of coastal sandy area.
国家科技期刊平台
NSTL
万方数据
维普
