长三角地区农用地土壤肥力特征及综合评价——以朱林镇为例

发布时间：2019-01-07 12:26

【摘要】：为了解长江三角洲地区农用地土壤肥力特征,以常州市金坛区朱林镇为例,利用模糊综合评价模型与地统计学及GIS技术相结合的方法,分析朱林镇的土壤肥力特征并对其进行综合评价。结果表明:pH为中性,有机质、全氮、阳离子交换量适中,速效钾含量较低,有效磷含量丰富;除有效磷具有中等程度的空间相关性外其他肥力指标均具有强烈的空间相关性;Kriging插值结果显示的各土壤肥力指标空间分布图能够很好的反映肥力指标的空间分布及丰缺状况;模糊综合评价结果表明朱林镇整体肥力处于中等水平,且东部肥力高于西部,南部肥力达到一等水平,与土壤质地、土地经营方式、肥力科学管理及境内地势多为圩田有关。其结果可为镇域尺度土壤肥力的空间内插、制图和取样设计提供参考,也为长江三角洲土壤可持续利用、肥力的科学管理提供依据。
[Abstract]:In order to understand the characteristics of soil fertility of agricultural land in the Yangtze River Delta region, taking Zhulin Town, Jintan District, Changzhou City as an example, the method of combining fuzzy comprehensive evaluation model with geostatistics and GIS technique was used. The characteristics of soil fertility in Zhulin Town were analyzed and evaluated. The results showed that pH was neutral, organic matter, total nitrogen, moderate cation exchange capacity, low available potassium content, rich available phosphorus content, and other fertility indexes had strong spatial correlation except for the moderate spatial correlation of available phosphorus. Kriging interpolation results show that the spatial distribution map of soil fertility index can reflect the spatial distribution and abundance of fertility index. The result of fuzzy comprehensive evaluation shows that the whole fertility of Zhulin Town is in the middle level, and the fertility in the east is higher than that in the west, and the fertility in the south reaches the first grade level, which is related to the soil texture, the management mode of the land, the scientific management of fertility and the polder field in the territory. The results can provide reference for spatial interpolation, mapping and sampling design of soil fertility in town scale, and also provide scientific basis for soil sustainable utilization and fertility management in the Yangtze River Delta.
【作者单位】：南京农业大学资源与环境科学学院;南京农业大学公共管理学院;
【基金】：国家科技支撑计划(2012BAJ22B02-03) 江苏高校优势学科建设工程资助项目(PAPD)资助
【分类号】：S158

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