The Influence of Land Use Change on Soil Quality of Soil Genetic Layers: A Case Study on the Coastal Plain of South Hangzhou Bay
Received date: 2005-11-15
Revised date: 2005-12-26
Online published: 2006-04-25
Supported by
National Natural Science Foundation of China, No.40572178; Natural Science Foundation of Zhejiang Province, No.Y505032
Land use change plays an important part in the studies of global environmental change and regional sustainable development. The change of soil quality can particularly reflect the impacts of human socio-economic activities on environment. Taking the coastal plain of south Hangzhou Bay as a case study, we analyzed the effects of land use changes on organic matter (OM), total nitrogen (TN), total phosphorus (TP), available phosphorus (AP), available potassium (AK), total salinity (TS), pH value in soil genetic layers, and assessed soil quality change related to different land use types from 1982 to 2003. The results show the following points: (1) The general change of soil quality in the coastal plain of south Hangzhou Bay declined obviously in A layer and rose slightly in B (or P) layer and C (or W) layer. The contents of TP decreased generally in all soil genetic layers, but the variation difference of other soil quality indices was relatively great. (2) The change of soil quality in the areas where land use changed was far more remarkable than that in the areas where land use remained unchanged. The value of quality variety is A layer > B (or P) layer > C (or W) layer. (3) The changes in soil tillage, cultivation, fertilization, irrigation and drainage activities related to land use may make some pedogenetic processes disappeared and bring in other new processes which will affect the soil quality and soil genetic layers directly.
Key words： land use; soil quality; soil genetic layers; coastal plain; south Hangzhou Bay
LI Jialin, LIU Chuang, ZHANG Dianfa,TONG Yiqin, YANG Xiaoping, LI Weifang . The Influence of Land Use Change on Soil Quality of Soil Genetic Layers: A Case Study on the Coastal Plain of South Hangzhou Bay[J]. Acta Geographica Sinica, 2006 , 61(4) : 378 -388 . DOI: 10.11821/xb200604005
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