大兴安岭干旱阳坡土壤水分和养分变异性研究  

Variability of Soil Moisture and Nutrients in Arid Sunny Hillslope of Great Xing'an Mountains

作　　者：付志祥[1] 孙海龙[1] 刘道锟 周林[1] 

机构地区：[1]东北林业大学林学院,哈尔滨150040

出　　处：《森林工程》2014年第3期21-26,共6页Forest Engineering

基　　金：国家科技支撑计划课题(2011BAD08B02-02)

摘　　要：在大兴安岭选择典型的干旱阳坡草丛和灌草丛植被,采用样线法研究植被类型间和地形部位间土壤水分、养分的空间分异特征。结果表明,草丛、灌草丛和山脊林地间土壤水分(SM)和养分(全碳(TC)、全磷(TP)、碱解氮(AN)、速效磷(AP)、速效钾(AK)、碳氮比(C/N))差异显著,均表现为山脊林地>灌草丛>草丛的格局;草丛和灌草丛不同地形部位土壤水分和养分(SM、TC、TP、AP、AK、和C/N)最大值均出现在山脊林地,但是在草丛坡下土壤水分和养分(SM、TC、TP、全钾(TK)和AP)高于坡上和坡中,而在灌草丛坡上土壤养分(TC、全氮(TN)、TP、AN、AP、AK和C/N)高于坡下和坡中。通过本研究得知,草丛和灌草丛土壤水分与磷素的缺乏是植被恢复的重要限制,地形和人为干扰改变了不同地形部位间土壤的水分和养分特征。Based on typical grassland and shrub-grassland in arid sunny slope of Great Xing＇an Mountains,soil moisture and nutrients of the different vegetation types and slope position were studied by using the methods of transect sampling. The results showed that： there were significant differences among the different vegetation（ Grassland,shrub-Grassland,ridge forest） of the soil moisture（ SM） and soil nutrient（ total carbon（ TC）,total phosphorus（ TP）,available nitrogen（ AN）,available phosphorus（ AP）,available potassium（ AK）,carbon nitrogen ratio（ C / N）） which were in order of ridge forest shrub-Grassland Grassland. The maximum value of the SM and soil nutrient（ TC,TP,AP,AK and C / N） of different slope position of grassland and shrub-grassland both appeared in the ridge forest. However,the SM and soil nutrient（ TC,TP,total potassium（ TK） and AP） of down slope in grassland were higher than middle slope and up slope,and the soil nutrients（ TC、total nitrogen（ TN）,TP,AN,AP,AK and C / N） in up slope of shrubgrassland were higher than down slope and middle slope. Our study indicates that the lack of SM and phosphorus is an important restriction of vegetation restoration in grassland and shrub-grassland. The Topography and human disturbance played important roles in changing the characteristic of SM and soil nutrients in the different parts of the terrain.

关 键 词：大兴安岭 干旱阳坡 土壤水分 土壤养分 

分 类 号：S792[农业科学—林木遗传育种]