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当前位置: 首页 > 文章 > 滨海沙地椰林间种牧草土壤水分空间异质性 热带作物学报 2011,32 (6) 1029-1036
Position: Home > Articles > Spatial Heterogeneity of Soil Moisture of Pastures Intercropped inCoconut Plantations in Coastal Sandy Area Hainan Province,China Chinese Journal of Tropical Crops 2011,32 (6) 1029-1036

滨海沙地椰林间种牧草土壤水分空间异质性

作  者：
杨伟波;王萍;牛聪;秦呈迎;唐龙祥
单  位：
中国热带农业科学院椰子研究所;海南大学农学院
关键词：
土壤水分;空间异质性;滨海沙地;椰林;牧草
摘  要：
通过网格5m×5m取样,运用地统计学方法研究滨海沙地椰林间种牧草表层土壤(0～20、20～40、40～60cm)水分的空间变异、分布及其生态学过程和机制。结果表明,研究区表层土壤含水量集中在3.54%～10.86%之间,均呈现弱变异特征。0～20、20～40、40～60cm层土壤含水量服从正态分布。土壤表层含水量总体上具有良好的空间变异结构,各层均具有中等及强烈的空间相关性,而且土壤水分的空间变异具有明显层次性。研究区各层土壤水分均符合高斯模型,且拟合效果较好,相对应的空间连续性也较好。等值线图显示表层土壤水分具有明显的阶梯状分布格局,结合半方差分析则可以看出:沙壤土、微地貌、人为干扰和植被盖度等是研究区土壤水分空间变异程度及其分布格局的重要影响因素。
译  名：
Spatial Heterogeneity of Soil Moisture of Pastures Intercropped inCoconut Plantations in Coastal Sandy Area Hainan Province,China
作  者：
YANG Weibo1,2,WANG Ping1,2,NIU Cong3,QIN Chengying3,TANG Longxiang1,2 1 Coconut Research Institute,Chinese Academy of Tropical Agricultural Sciences,Wenchang,Hainan 571339,China 2 Hainan Key Biological Laboratory of Tropical Oil Crops,Wenchang,Hainan 571339,China 3 College of Agronomy,Hainan University,Danzhou,Hainan 571737,China
关键词：
Soil moisture;Spatial heterogeneity;Coastal sandy area;Coconut plantations;Pastures
摘  要：
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.

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