西南林业大学学报2017，Vol.37Issue(3)：88-94,7.DOI:10.11929/j.issn.2095-1914.2017.03.014
退化红壤区植被恢复过程夏季土壤水分时空变异格局动态
Spatiotemporal Variation of Soil Moisture in Summer Season During Process of Vegetation Restoration in Degraded Red Soil Region
摘要
Abstract
Through the classical statistics and the geological statistics method, the spatial variation patterns of soil water of rehabilitated forest and natural restoration grassland in different recovery time (15 a, 25 a) and differ-ent soil layer (0-20 cm, 20-40 cm) in the degraded red soil region, Taihe, Jiangxi Province was compared and analyzed. The results show that the soil moisture of rehabilitated forest and natural restoration grassland were uni-formly distributed at the beginning. With the growing years, the soil moisture would rise and discrete degree would also increase in different extent for moderate variability. The distribution of soil moisture was the normal distribu-tion, matched a spherical model ( R2>0. 804) . The data showed the significant spatial correlation and spatial varia-tion characteristics, which mainly came from soil parent materials, topography and other structural variation. There was a significant increase in the nugget, sill and nugget/sill. The total variation had increased and caused by ran-dom factor according to the time alignment. The sill in the 0-20 cm soil layer of natural restoration grass was higher than that in the 20-40 cm soil layer at the same year, but the nugget and nugget/sill showed the contrary, so the random variation of under layer soil moisture was stronger than upper layer. For the rehabilitated forest, the 3 inde-xes showed that upper soil layer higher than under layer, and the random variation in surface layer was stronger. The spatial heterogeneity of surface soil moisture in rehabilitated forest increased with the restoration years, and dis-played serious fragmentation. The variation range of the 2 layers (0-20 cm and 20-40 cm) in natural restored grass significantly increased with the change of time. The increased sampling density and extend slope would reveal spatial variation characteristics of soil moisture in degraded red soil region.关键词
退化红壤/重建森林/土壤水分/空间变异格局/地统计学Key words
degraded red soil/rehabilitated forest/soil moisture/spatial variation patterns/geological statistics分类
农业科技引用本文复制引用
张志坚,刘亮英,刘苑秋,吴春生,丘满圆,郭锦荣,邓文平..退化红壤区植被恢复过程夏季土壤水分时空变异格局动态[J].西南林业大学学报,2017,37(3):88-94,7.基金项目
赣鄱英才 "555" 工程领军人才培养计划项目资助 （）
国家自然科学基金项目 (30960312) 资助. （30960312）
