摘要
通过野外采样布点和室内理化分析,对瓮安县农产品生产基地农用地97个土壤样品进行采样、检测与分析,以有机质、全氮、有效磷、速效钾为评价因子,综合运用GIS、地统计分析法和组合赋权TOPSIS模型法对瓮安县农产品生产基地土壤养分进行综合评价研究。研究结果表明:1)研究区土壤养分整体处于中等水平,其中土壤速效钾含量丰富,有机质、全氮、有效磷含量为适量水平;2)研究区土壤养分综合评价图分析显示,研究区土壤养分等级总体较高,土壤养分状况良好。其中,猴场镇、雍阳办事处等部分区域土壤养分等级极高,以面状形式为主,面积占0.47%;珠藏镇、建中镇、玉山镇、永和镇等部分地区土壤养分等级为高,以带状为主,面积占14.51%;中等土壤养分空间分布区域面积最广,面积占68.09%;江界河镇、中坪镇、平定营镇等部分区域土壤养分等级为低,面积占14.47%;极低的土壤养分分布最少,面积占2.46%。研究结果为掌握瓮安县农产品生产基地土壤养分肥力状况、空间变异特征及对其精准施肥提供了参考。
The paper analyzed about 97 farmland soil by field sampling and laboratory samples from the agricultural products base in Wengan. Using organic matter,total N, available P, available K as the indicators, the nutrient of agricultural products area soil samples was evaluated by GIS, geostatistical analysis and combination determining weights TOPSIS model. The results revealed that ： 1 ） The soil nutrients in the studied area were overall at a moderate level, with abundant available K, medium organic matter, total N, and medium P. 2） The map of the comprehensive evaluation of soil nutrients in the study area showed that the soil nutrient grades in the study area were generally high and the soil nutrient status was good. Among them, the nutrient grades of some areas such as Houchang Town and Xiangyang Office were extremely high, mainly in the form of surface, accounting for 0. 47%. The soil nutrient grades in some areas such as Zhuzang Town, ]ianzhong Town, Yushan Town and Yonghe Town were high, mainly in strip, accounting for 14. 51%. The medium soil nutrient spatial distribution area was the widest, accounting for 68.09% ; the soil nutrient grades were low in Jiangjiehe Town, Zhongping Town, Pingdingying Town and other areas, accounting for 14. 47%. Very low soil nutrient distribution was with an area of 2. 46%. The results provided a scientific basis for mastering fertility status determing soil nutrients, spatial variability and precise fertilization for the agricultural products base.
作者
李丹丹
周忠发
但雨生
谭玮颐
蒋翼
LI Dan-dan;ZHOU Zhong-fa;DAN Yu-sheng;TAN Wei-yi;JIANG Yi(School of Karst Science,School of Geography ＆ Environment Science,Guizhou Normal University,Guiyang 550001,China;The State Key Laboratory Incubation Base for Karst Mountain Ecology Environment of Guizhou Province,Guiyang 550001,China;State Engineering Technology lnsrtute for Karst Desertification Control,Guiyang,550001,China)
出处
《环境工程》
CAS
CSCD
北大核心
2018年第8期183-188,共6页
Environmental Engineering
基金
国家自然科学基金地区项目"喀斯特石漠化地区生态资产与区域贫困耦合机制研究"(41661088)
贵州省高层次创新型人才培养计划--"百"层次人才(黔科合平台人才[2016]5674)
国家遥感中心贵州分部平台建设(黔科合计Z字[2012]4003)
关键词
土壤养分
组合赋权TOPSIS模型
瓮安县农产品生产基地
空间格局特征
综合评价
soil nutrient
combination determining weights TOPSIS model
agricultural production base in Weng＇ an County
spatial structure
comprehensive evaluation
