土地利用变化对土壤发生层质量演化的影响——以杭州湾南岸滨海平原为例
收稿日期: 2005-11-15
修回日期: 2005-12-26
网络出版日期: 2006-04-25
基金资助
国家自然科学基金项目 (40572178); 浙江省自然科学基金项目 (Y505032)
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
以杭州湾南岸滨海平原为研究区,通过定点配对土壤采样分析,选取有机质、全氮、全磷、速效磷、速效钾、全盐、pH值等要素作为土壤质量评价指标,分析了1982~2003年土地利用变化对土壤发生层质量演化的影响。结果表明：① 1982~2003年杭州湾南岸滨海平原土壤发生层质量的总体演化特征表现为A层综合质量指数明显下降,B (或P)、C (或W) 层略有上升。整个土壤发生层全磷含量普遍下降,其他单质量指标的变化差异较大。② 土地利用方式变化使得不同发生层的土壤有机质含量等单质量指标和综合质量指数的变化都明显大于土地利用方式未发生变化的土壤,其变化量表现为A层> B (或P) 层 > C (或W) 层。③ 土地利用变化引起的土壤耕种、栽培、施肥和排灌制度的变化,改变着土壤成土过程,从而对土壤发生层质量演化产生直接影响。
李加林,刘闯,张殿发,童亿勤,杨晓平,李伟方, . 土地利用变化对土壤发生层质量演化的影响——以杭州湾南岸滨海平原为例[J]. 地理学报, 2006 , 61(4) : 378 -388 . DOI: 10.11821/xb200604005
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
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