华南丘陵区村级景观下土地利用/土地覆盖对土壤质量的影响
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* 美国国家科学基金项目(grant:DEB-0075617);中国国家科技部973项目(2005CB121108)资助


SOIL QUALITY IN RELATION TO LAND USE/COVER IN LANDSCAPE AT A VILLAGE LEVEL IN HILLY REGIONS SOUTH CHINA
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    摘要:

    利用IKONOS高分辨率(1m)卫星遥感图,根据Ellis提出的村级景观分类体系,研究华南丘陵区村级景观中的土壤容重、土壤有机质、土壤全氮和土壤全磷的含量和分布特征。结果表明:不同土地利用景观中,表层土壤(0~15cm)的土壤容重、有机质和全氮均有显著差异,最大值分别为:1.42gcm-3(建设用地)、18.67gkg-1(水田)和0.95gkg-1(水田),而全磷差异不显著。由于林地面积最大,其土壤养分储量也最大,表层土壤有机质、全氮、全磷储量分别占整个地区表层总储量的55.05%、53.88%、46.23%。不同土地覆盖景观中,表层土壤的土壤容重、有机质、全氮也都有显著差异,最大值分别为:1.42gcm-3(硬化地面)、15.96gkg-1(混合植被)和0.68gkg-1(混合植被),而全磷差异也不显著。多年生植被在土地覆盖景观中所占面积最大,其表层土壤有机质、全氮、全磷储量分别占整个地区表层总储量的55.01%、54.53%、59.02%。由于下层受人为干扰较小,不论是在不同土地利用方式还是在土地覆盖下,下层土壤(15~30cm)的土壤容重、有机质、全氮和全磷均无显著差异。人为强烈干扰下,植被覆盖度低的交通用地、房屋及其附近的干扰地和荒地与植被覆盖度高的林地、水田相比较,土壤容重高,而土壤有机质、土壤全氮和土壤全磷含量低。

    Abstract:

    To analyze soil quality in relationship to land use/cover in landscape at a village level in hilly regions South China, village landscape maps were plotted out of high resolution (1m) IKONOS satellite imagery using a standardized ecological landscape classification (land form, land use, land cover, ecotope) and mapping system. Results demonstrate that: Under different land use landscapes, soils in the 0~15 cm layer differ sharply in soil bulk density (SBD) (highest in Constructed of 1.42 g cm-3), soil organic material (SOM) (highest in Paddy soil of 18.67 g kg-1) and soil total nitrogen (TN) (highest in Paddy soil of 0.95 g kg-1). The land use landscape of the region mostly consists of Forests (52.05%), Rainfed land (22.30%) and Paddy soil (11.6%). The stock of soil nutrients is mainly affected by soil area. In the 0~15 cm soil layer, the Forest has the highest soil nutrient stock, about 55.05% in SOM, 53.88% in TN, and 46.23% in soil total phosphorus (TP) of total region, respectively. Under different land cover landscapes, there also are significant differences in SBD (highest in Sealed cover of 1.42 g cm-3), SOM (highest in Mixed cover of 15.96 g kg-1) and TN (highest in Mixed cover of 0.68 g kg-1). The land cover landscape of the region is composed of Perennial cover (54.50%), Annual cover (15.15%) and Mixed cover (22.92%). The soils nutrient stock in the 0~15 cm layer under Perennial cover are the highest, about 55.01%, 54.53%, and 59.02% in SOM, TN and TP of total region, respectively. Because of little human disturbance, no significant difference is found in SBD, SOM, TN and TP of 15~30 cm soil layer in different types of land use/cover. Compared with soils in woodlands and paddy fields with high in vegetation cover, soils in residential areas, barelands under intensive human distur-bance and lands with low in vegetation cover are high in SBD but low in soil nutrient content.

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焦加国,武俊喜,李辉信,杨林章,肖红生,ErleCEllis.华南丘陵区村级景观下土地利用/土地覆盖对土壤质量的影响[J].土壤学报,2007,44(2):204-211. DOI:10.11766/trxb200512310203 Jiao Jiaguo, Wu Junxi, Li Huixin, Yang Linzhang, Xiao Hongsheng, Erle C Ellis. SOIL QUALITY IN RELATION TO LAND USE/COVER IN LANDSCAPE AT A VILLAGE LEVEL IN HILLY REGIONS SOUTH CHINA[J]. Acta Pedologica Sinica,2007,44(2):204-211.

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  • 收稿日期:2005-12-31
  • 最后修改日期:2006-05-18
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  • 在线发布日期: 2013-02-25
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