摘要
针对毛乌素沙地人工植被改善土壤侵蚀状况的特征,以陕西省榆林地区为研究区,选择研究区典型固沙树种—樟子松林(Pinus sylvestris var.mongolica Litv.)下土壤为研究对象,在系统采集土壤样品和多指标测试分析计算的基础上,建立了包含6项指标的评价体系,应用熵权法计算了各评价指标的权重,最后综合研究了不同林龄樟子松林下土壤的抗蚀性差异和主要影响因素。结果表明:(1)不同林龄樟子松人工林土壤抗蚀性从大到小依次是:1970s林地>1960s林地>1980s林地>自然荒草地;(2)土壤机械组成对土壤抗蚀性的影响最大,结构性颗粒指数、<0.05 mm土壤颗粒含量、土壤水分含量、土壤有机质含量可以作为评价土壤抗蚀性的重要指标,其值的大小能够很好的反应土壤抗蚀性大小。
Based on the fact that the artificial vegetation in Mu Us sandy land has greatly improved soil erosion condition,we chose Yulin,Shaanxi province as the study area,soil of the typical sand-fixation species-Pinus sylvestris var as the research object.Then we established the evaluation system which included six indicators,on the basis of systematical soil samples collection and multi-index test,analysis and calculation.Finally,we did a comprehensive study on the differentiation of soil corrosion resistance and influencing factors by using the entropy method.The results showed that:(1)the soil resistance of different age Pinus sylvestris var was 1970s>1960s>1980s>wild land;(2)soil mechanical composition has the greatest impact on soil corrosion resistance.The structural particle index,soil particle content<0.05 mm,soil moisture content and soil organic matter content can be used as important indexes to evaluate soil corrosion resistance.
作者
张宁宁
周阳
严加坤
亢福仁
ZHANG Ning-ning;ZHOU Yang;YAN Jia-kun;KANG Fu-ren(Shaanxi Key Laboratory of Ecological Restoration in Shanbei Mining Area,Yulin University,Yulin 719000,China;Supervision Bureau of Soil and Water Conservation on the Adjacent Area of Jin-Shan-Meng,Yellow River Conservancy Commission,Yulin,719000,China)
出处
《榆林学院学报》
2019年第6期48-52,共5页
Journal of Yulin University
基金
陕西省陕北矿区生态修复实验室开放基金(KFXM201807,ZZXM201802)
国家自然科学基金(41371281)
水利部黄土高原水土流失过程与控制重点实验室开放基金(201804)
国土资源部退化及未利用土地整治工程重点实验室开放基金(SXDJ2018-08)
关键词
土壤抗蚀性
熵权法
指标体系
影响因素
soil durability
the entropy method
index system
influence factors
