论文部分内容阅读
在一定的气候条件下,土壤与地形及植被之间有一定的相关关系(详见相关示意图),所以在掌握土壤分布规律与变化趋势的基础上,改变外界条件即可达到改良土壤,使土壤肥力由低变高;充分利用各类土壤潜在能力的目的。一、土壤与地形、植被的关系桃山林区位于小兴安岭南坡西部,原始地带性森林植被为红松阔叶林,但由于多年来的集中过量采伐,现已逆行演替为针阔混
Under some climatic conditions, there is a certain relationship between soil and topography and vegetation (see the relevant schematic diagram). Therefore, on the basis of grasping the laws and trends of soil distribution, changing the external conditions can achieve the improvement of soil, Fertility from low to high; make full use of the potential of various types of soil purposes. First, the relationship between the soil and the topography, vegetation Peach Hill area is located in the western slope of the southern slope of the Little Xing’an Mountains, the original virgin forest vegetation for Korean pine broad-leaved forest, but due to excessive over-harvesting, retrograde succession has been coniferous and broad-leaved