采用地统计学的方法，研究了江西修水退化石灰岩红壤区四种人工林在高温干旱季节土壤水分空间变异规律及其分布格局。结果表明：（1）不同类型人工林的土壤水分表现出不同的空间变异性。枫香纯林土壤水分的结构方差比为0.551，梾木×香椿混交林为0.730均介于0.25～0.75之间，表现出中等程度的空间相关性；青桐×桤木混交林的为0.841，香椿纯林的为0.934，均大于0.75，表现出强烈的空间相关性。（2）梾木×香椿、青桐×桤木混交林土壤水分在水平方向和垂直方向上空间变异程度比枫香纯林、香椿纯林低混交林土壤水分的分布更均匀。（3）0~10cm层土壤含水量的变异程度较10~20 cm土层和20~ 40 cm土层大，即随土层深度增加土壤水分分布趋于均匀。
Spatial variability and distribution of soil moisture in four plantations in Xiushui County, Jiangxi Province during the hot and dry season was studied using the geostatistical method. Results show that soil moisture varied in spatial variability between the four plantations. The structural variance ratios（C/Co＋C）of the soil moisture in liquidambar formosana plantation and Cornus macrophylla-Toona sinensis mixed forest were 0.55 and 0.73, respectively, suggesting spatial correlation of a medium level. In comparison, the ratio of Firmiana simplex-Alnus cremastogyne mixed forest and Toona sinensis plantation were higher (0.84 and 0.93, respectively), suggesting spatial correlation of a high level. Soil moisture of the mixed forests was lower than of the pure plantation forests in spatial variability on both vertical and horizontal spatial dimensions, but more uniform in spatial distribution. Spatial variability of soil moisture in the 0~10 cm soil layer was greater than in both the 10~20 cm and 20~40 cm soil layers, indicating that soil moisture tend to be uniform with soil depth.
刘苑秋,郭圣茂,王红胜,李靖,孙建军.退化石灰岩红壤区四种人工林旱季土壤水分的空间变异[J].土壤学报,2010,47(2):229-237. DOI:10.11766/trxb200811250205 Liu Yuanqiu, Guo Shengmao, Wang Hongsheng, Li Jing, Sun Jianjun. Spatial variability of soil moisture in four plantations in degraded limestone red soil region[J]. Acta Pedologica Sinica,2010,47(2):229-237.复制