关于黄土高原地区小老树成因及其改造途径的研究 Ⅲ:小老树的成因及其改造途径  

The Genesis of Small Old Trees and the ways of Their Transformation on the Loess Plateau Ⅲ.The Genesis of Small old Trees and the Ways of Their Transformation

作　　者：侯庆春[1] 黄旭[1] 韩仕峰[1] 张孝中[1] 

机构地区：[1]中国科学院,水利部西北水土保持研究所

出　　处：《水土保持学报》1991年第4期80-86,共7页Journal of Soil and Water Conservation

摘　　要：水分不足是黄土高原地区形成小老树的重要原因,土壤中营养元素的匮乏也是极其重要的原因,因此,小老树改造的关键在于增加林地土壤水分和营养元素,提高土壤肥力。文章围绕这一目标,提出了小老树改造的途径与方法。Water stress is an important cause for the formation of small old trees on the loess plateau. Also, the shortage of nutrient elements in soil is an extremely important reason. For this reason; the key link to the transformation of small old trees lies in increasing soil moisture and nutrient elements in the forest lands and bettering soil fertility. This paper suggests the ways and concrete methods for transforming the small old trees around this purpose.

关 键 词：小老树 营养 改造 土壤 水分 

分 类 号：S763.19[农业科学—森林保护学]