摘要
了解掌握小流域不同地形部位生态位特征,配置与之相适应的植物种,是小流域治理取得最佳经济效果的前提条件之一。通过对不同地形部位小气候、土壤水分与植物措施关系的分析,证明主要由于风速及土壤水亏缺的影响,梁峁顶、坡面上、中部位及阳坡下部仅宜营造灌木林。乔木林密度不宜超过200株/亩。随坡位抬升农作物产量降低,相同部位阴坡高于阳坡,梯田高于坡地。牧草适宜于各种部位种植。无论何种植物,土壤供水均处于亏缺状态,必须发展聚流技术以保证植物需求。
Through analysis to the relationship of small climaLe at different topographic section,soil moisture with plant measures,it is suggested that because of the effects of wind velocity and the dificiency of soil moisture the ridge and mound top,the upper and middle part of slope and rthe lower part of sun slope are only suitable to plant shrubs,density of tees could not be over 200/mu.As the slope position is raised the yield of crop is reduced,that of north slope is higher than of south slope,and that from terrace is higher than from slope.Grazing grass could be planted at all position.It is thought that the water providing from soil is not enough for every plant and that the flow-accumulation techniques should be developed to enssure the requirments of plants.
出处
《水土保持学报》
CSCD
北大核心
1991年第2期46-51,83,共7页
Journal of Soil and Water Conservation
关键词
小流域
生态位特征
植物
土壤侵蚀
small
watershed
character of ecological position
plant species
disposition