甘肃农业大学农耕特色库

按文献类别分组

按栏目分组

按年份分组

按来源分组

关键词

基于~（137）Cs技术的中国北方农牧交错带土壤侵蚀研究: 作者： 姜洪涛 来源： 内蒙古师范大学 年份： 2010 文献类型： 学位论文 关键词： 土壤侵蚀农牧交错带 ~Cs 示踪; 描述： ttention, but also agriculture and eco-environmental sustainable development important problems. Farming-pastoral Transitional zone in north China, as our county returning farmland to forest and returning cropping land to grassland are the focus areas, natural environment and socio-economic conditions shown a clear transition characterized by the transition zone of the interpenetration and staggered distribution of agriculture and animal husbandry, which is curbing desertification important ecological barrier, but also ecologically fragile belts.; 全文：表现出明显的过渡性特点,是农业和牧业相互渗透,交错分布的过渡区,它是遏制荒漠化的重要生态屏障,同时也是生态脆弱地带。本研究在我国北方农牧交错带中选取2个研究区兰州和大同,在研究区采集背景样和全样共64个

< 1 >