关键词: 土地利用方式, 土壤肥力, 重金属污染, 评估, 葛塘村

Abstract: In this study, paddy field, dry land, tea garden, and orchard were selected in Getang Village, Jiande City of Zhejiang Province, to investigate the soil nutrient index and heavy metal concentrations under these four different land-use patterns. Their integrated fertility index and heavy metal pollution risk were further evaluated to provide a reference for the construction of organic food production and rural ecological environment protection demonstration villages. The results show that the soil pH in the research area was slightly acidic, and the soil organic matter, total nitrogen, available nitrogen, and available phosphorus contents were at moderate or relatively abundant levels, while the available potassium content was at a deficient level. The soil fertility was significantly influenced by land-use patterns. The pH of tea garden soil was significantly lower than those of other land-use patterns; the organic matter and total nitrogen contents in the dryland soil were significantly lower than those of other land-use patterns; while the available phosphorus and available potassium contents in the orchard soil were significantly higher than those of other land-use patterns. The comprehensive soil fertility index of the orchard was 0.55, which is significantly higher than those of the other three land-use patterns. The comprehensive soil fertility index of the paddy field was at a moderate level, and those for the tea garden and dry land were at a poor level. Under different land-use patterns, the available potassium content was the main limiting factor for soil fertility in Getang Village. Additionally, the soil heavy metal concentrations under different land-use patterns in the research area were all lower than the soil pollution risk screening values for agricultural land, which indicates that it was uncontaminated by heavy metals.

Key words: land-use pattern, soil fertility, heavy metal pollution, assessment, Getang Village