杭州湾南岸滨海平原土地利用变化对土壤发生层次质量演化的影响

来源 :地理学报(英文版) | 被引量 : 0次 | 上传用户:yyaizy
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
Land use change plays an important part in the studies of global environmental change and regional sustainable development. The change of soil quality can particularly reflect the impacts of human socio-economic activities on environment. Taking the coastal plain of south Hangzhou Bay as a study case, we analyzed the effects of land use changes on organic matter (OM), total nitrogen (TN), total phosphorus (TP), available phosphorus (AP),available potassium (AK), total salinity (TS), pH value in soil genetic layers, and assessed soil quality change related to different land use types from 1982 to 2003. The results show that: (1)The general change tendency of soil quality in the coastal plain of south Hangzhou Bay declined obviously in A layer and slightly rise in B (or P) layer and C (or W) layer. The contents of TP decreased generally in all soil genetic layers, but the variety difference of other soil quality indices was relatively great. (2) The change of soil quality in the areas where land use changed is far more remarkable than that with land use unchanged. The value of quality variety is A layer B (or P) layer C (or W) layer. (3) The changes of soil tillage, cultivation, fertilization, irrigation and drainage activities related to land use may make some soil-forming processes disappeared and bring in other new processes which will affect the soil quality and soil genetic layers directly.
其他文献
In this paper an overall scheme of the task management system of ternary optical computer(TOC)is proposed,and the software architecture chart is given.The funct
随着我国改革步伐的加快及国内经济建设的快速发展 ,我国利用外资工作取得了飞速的发展 ,外资的利用对促进我国经济持续、快速、健康的发展发挥了极其重要的作用 .进入 2 0世
企业战略决策是关系到企业生存和发展的重大决策,大多表征为群体决策问题,需要企业决策者和各部门参与.该文研究了在Multi-Agent环境下,以部门为群体决策单元的GDSS中决策问
研究了社会化协作与小农生产方式两种状态转换的机制,明确了交易收益等于通过交易节约的自给自足生产所需额外投入的资源,交易支出等于交易成本,建立了一个Stackelberg对策模
淡水资源是生物界和社会环境的基础,当水资源变得越来越稀少时,我们将会更多地关注整个流域中上游与下游水资源综合利用的协调性。——Peter H.Gleick《世界之水:2008-2009年
研究的目的就是试图揭示系统集成的机理.在自然现象周界理论的基础上,本文将周界理论拓展到应用系统和经营系统,提出了应用周界分析方法来研究系统的集成机理,分析了影响系统
作文课一直是语文教师颇为头疼的,也是压在学生肩上的一座大山。学生怕写,教师怕教,源于一个“难”字。为了解决学生作文难的问题,教师就要做好作文教学的前置工作,为作文教
2011年6月28日至7月4日,河南省住房和城乡建设厅副厅长王国清率领第四检查验收组,按照河南省政府的统一部署,对平顶山、南阳、许昌三市的粘土砖瓦窑厂治理整顿工作进行了省级
The problem addressed in this paper concerns the prototype generation for a cluster-based nearest-neighbour classifier.It considers,to classify a test pattern,the lines that link the patterns of the t
地理实践活动作为中学地理教学的重要组成部分,是培养学生的分析能力、思维能力和实践能力的有效途径。本文着重从理论与实践的结合的角度探讨了地理实践活动开展的重要性、