董志塬坡面造林地土壤水分及树种适应性研究  

Study on Soil Moisture of Afforested Slope Land and Adaptability of Tree Species of Dongzhi Tableland

作　　者：王志雄[1] 赵嘉莹[1] 郜文旺[1] 左涛鸣[1] 

机构地区：[1]黄河水利委员会西峰水土保持科学试验站,甘肃西峰745000

出　　处：《中国水土保持》2017年第9期52-55,共4页Soil and Water Conservation in China

基　　金：水利部黄土高原水土流失过程与控制重点实验室开放课题基金项目(2015006)

摘　　要：针对董志塬区造林成活率低、保存率低等问题,结合水保大项目区林草建设实践,选取南小河沟林草大断面及典型流域造林点对其土壤含水量、土壤理化性状、林木生长量、林分密度等进行了观测调查,结果表明:林草大断面0~80cm土层土壤含水量阴坡>阳坡,土壤有机质和氮、磷、钾等养分含量总体上阴坡>阳坡,同坡面有机质含量坡上位>坡中位>坡下位,土壤容重阳坡明显高于阴坡;同一立地条件下,造林密度影响土壤含水量,密度过高的林分土壤含水量减少。Aiming at the issues of low survival rate and low preservation rate of afforestation of Dongzhi tableland area and combining with the practice of trees and grasses planting in soil and water conservation project area,it selected big cross-section of trees and grass of Nanxiaohe gully and afforestation area of typical small watersheds and conducted observational survey on soil moisture content,soil properties,volume of trees growth and stand density. The outcomes show that a) the soil moisture content of northern slope is more than southern slope,generally the nutrient contents of organic matters,N,P and K of northern slope is more than southern slope,the organic matter content of the same slope is upper part > middle part > lower part and the bulk density of southern slope is obviously high than that of northern slope and; b) Under the same site conditions,planting density effects soil moisture content and the soil moisture content of big density stand is reduced.

关 键 词：树种适应性 土壤水分 董志塬 

分 类 号：S725[农业科学—林木遗传育种]