| 南京市郊蔬菜地土壤肥力的时空变化规律 |
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| 引用本文： | 房世波,潘剑君,杨武年,姜小三,江利明.南京市郊蔬菜地土壤肥力的时空变化规律[J].土壤,2003,35(6):518-521. |
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| 作者姓名： | 房世波 潘剑君 杨武年 姜小三 江利明 |
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| 作者单位： | 1. 成都理工大学遥感与GIS研究所,成都,601159
2. 南京农业大学,南京,210095 |
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| 基金项目： | 国家自然科学基金资助项目阶段性成果(49771043). |
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| 摘 要： | 本文以南京市城市化进程中蔬菜地土壤肥力的时空变化为例,分析了蔬菜地土壤肥力的空间变化和时间变化的规律,并对肥力的时空变化原因进行了剖析。结果表明:城市化促进了蔬菜地土壤肥力的空间变异,城区全P、有机质和全N较郊区和农区偏高,这与菜地耕作时间和熟化程度有关。pH值从城区到农区依次降低,与城市建筑废弃物的碱性输出有关。1999年与1980年比较,全N、有机质和有效K含量增加,pH值增加,总P含量降低。
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| 关 键 词： | 城市化 蔬菜地 土壤肥力 空间变化 时间变化 |
SPATIO-TEMPERAL DISTRIBUTION OF FERTILITY IN VEGETABLE SOIL IN NANJING |
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| Fang Shibo,Pan Jianjun,Yang Wunian,Jiang Xiaosan and Jiang Liming.SPATIO-TEMPERAL DISTRIBUTION OF FERTILITY IN VEGETABLE SOIL IN NANJING[J].Soils,2003,35(6):518-521. |
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| Authors: | Fang Shibo Pan Jianjun Yang Wunian Jiang Xiaosan and Jiang Liming |
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| Institution: | Fang Shibo1 Pan Jianjun2 Yang Wunian1 Jiang Xiaosan2 Jiang Liming1 |
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| Abstract: | With spatial and temporal variation of soil fertility in vegetable soil during the course of urbanizations in Nanjing, the capital of Jiangsu province, as a case for study, laws and causes of the spatial and temporal variation were analyzed. The results showed that urbanizations promoted variation of soil fertility of vegetable field: The content of total P, total organ matter and total N in urban area was higher than that in suburban and rural area, which is associated with mellowness of the soil and time length of its cultivation. The value of pH went down gradually from urban to rural areas. The content of total N, total organ matter, available K and pH in 1999 was higher than that in 1980, respectively whereas the content of total phosphate in 1999 was lower than that in 1980. |
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| Keywords: | Urbanizations Vegetable plots Soil fertility Spatial distribution Temporal variation |
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