摘要
华北土石山区是京津冀地区重要水源涵养、防风固沙和水土保持功能区,是维护京津冀生态安全的重要屏障。土壤养分涵养能力是影响生态工程建设的重要影响因素之一。土壤微量元素是土壤肥力的重要组成部分,受到土地利用类型的强烈影响。为揭示华北土石山区土地利用类型对土壤有效态微量元素的影响,本研究以张家口市崇礼区耕地、草地和林地等主要土地利用类型为研究对象,系统分析不同深度土壤有效铁、有效锰、有效铜、有效锌含量差异及其影响因素。研究结果发现,土地利用类型对土壤有效态微量元素含量具有显著影响(P<0.05)。耕地土壤有效铁、有效锰含量均显著低于林地和草地,均值分别为10.46和10.94 mg·kg^-1;耕地土壤有效锌含量(2.58 mg·kg^-1)显著高于林地和草地;耕地土壤有效铜含量(0.67 mg·kg^-1)显著高于草地,与林地土壤无显著差异(P>0.05)。林地和草地土壤有效态微量元素呈现一定的表聚性,而耕地0-15和15-30 cm土壤有效态微量元素含量均无显著差异。耕地土壤有机碳含量均显著低于林地和草地。土壤有机碳含量与有效铁和有效锰含量呈正相关关系,但与土壤有效铜和有效锌含量呈负相关关系。研究结果可为研究区不同土地利用类型的土壤养分科学管理和土地的可持续利用提供依据。
The rocky mountain area of north China is an important functional area for water conservation,sand fixation and soil-water retention in Beijing-Tianjin-Hebei.It is an important barrier to maintain the ecological security of Beijing-Tianjin-Hebei.Soil nutrient conservation capacity is an important factor affecting the construction of ecological engineering.Soil trace elements are an important part of soil fertility and are strongly influenced by land use types.To reveal the effect of land use type on soil available trace elements in the rocky mountain area of north China,the contents of soil available Fe,Mn,Cu and Zn at 0-15 and 15-30 cm were investigated considering three land use types(cropland,grassland and forestland)in Chongli district,Zhangjiakou City.The results showed that the land use type had significant influence on the content of the soil available trace elements(P<0.05).Contents of available Fe and Mn in cropland were significantly lower than those in forestland and grassland,with mean values of 10.46 and 10.94 mg·kg^-1,respectively.The available Zn content(average value 2.58 mg·kg^-1)in cropland was significantly higher than that in forestland and grassland.The available Cu content(0.67 mg·kg^-1)in cropland was significantly higher than that in grassland and exhibited no significant difference(P>0.05)from that in forestland soil.The available trace elements in forestland and grassland soil showed surface polymerization,while that of available trace elements in vegetable plots in 0-15 and 15-30 cm of soil showed no significant difference.The contents of soil available Fe and Mn were positively correlated with the soil organic matter,but negatively correlated with the content of soil available Cu and Zn.The soil organic carbon content of cropland was significantly lower than that of forestland and grassland,with a mean value of 1.99 g·kg-1.These results provide a theoretical reference for soil nutrients management and sustainable land use.
作者
王兴灵
张怡颖
谷丰
刘泉
周明华
WANG Xingling;ZHANG Yiying;GU Feng;LIU Quan;ZHOU Minghua(Institute of Mountain Hazards and Environment,Chinese Academy of Sciences,Chengdu 610041,Sichuan,China;School of resources and Environment Engineering,Mianyang Teachers'College,Mianyang 621000,Sichuan,China)
出处
《草业科学》
CAS
CSCD
2020年第7期1272-1280,共9页
Pratacultural Science
基金
国家水体污染控制与治理科技重大专项(2017ZX07101001)
中国科学院战略性先导科技专项(A类)(XDA23090403)。
