京西水源保护林不同坡位华北落叶松林土壤理化性质比较  

Comparison of Soil Physical and Chemical Properties of Larix principis-rupprechtii Forests on Different Slopes of Jingxi Water Source Protection Forests

作　　者：刘海翔 王浩宁 梁世兴 孟祥嵩 杨新兵[3] 郭建军 LIU Haixiang;WANG Haoning;LIANG Shixing;MENG Xiangsong;YANG Xinbing;GUO Jianjun(Zhangjiakou Saibei Forest Farm State owned Forest Farm Management Office,Zhangjiakou 075000;Zhangjiakou Zhuolu Forest Farm,Zhangjiakou 075600;Forestry College of Hebei Agricultural University,Baoding 071000)

机构地区：[1]张家口市塞北林场市国有林场管理处,河北张家口075000 [2]张家口市涿鹿林场,河北张家口075600 [3]河北农业大学林学院,河北保定071000

出　　处：《林业勘查设计》2023年第1期69-73,78,共6页Forest Investigation Design

基　　金：中央财政林业科技推广示范资金项目:“标准化水源保护林营造及经营示范区建设”(冀sfq〔2020〕003号).

摘　　要：为探究坡位对京西水源保护林土壤理化性质的影响,以北京西部张家口市涿鹿林场华北落叶松林为研究对象,测定不同坡位条件下的土壤物理性质和养分含量,并进行对比,结果表明:1)华北落叶松生长指标坡下>坡上;2)不同坡位土壤物理性质存在差异,土壤容重坡上=坡下,土壤容重随土壤深度增加而增加;土壤总孔隙度、毛管孔隙度、最大吸持贮水量、饱和贮水量坡上<坡下,土壤非毛管孔隙度、最大滞留贮水量坡上>坡下;总孔隙度、毛管孔隙度、非毛管孔隙度、最大吸持贮水量、最大滞留贮水量均随土壤深度增加而减小;3)不同坡位土壤养分存在差异,土壤pH值、有机碳、全氮为坡上>坡下,碱解氮、全磷、有效磷、全钾、速效钾为坡上<坡下;4)除土壤全磷和有效磷外,土壤pH值、有机碳、全氮、碱解氮、全钾、速效钾均表现为随土壤深度增加而减少的趋势。总体来看坡下土壤贮水能力更强,养分含量更为充足,华北落叶松生长更好。In order to explore the impact of slope position on the physical and chemical properties of soil in the Jingxi Water Source Protection Forest,the Larix principis-rupprechtii forest in Zhangjiakou Zhuolu Forest Farm in western Beijing was taken as the research object,and the soil physical properties and nutrient contents under different slope positions were measured and compared.The results showed that:1)The growth index of Larix principis-rupprechtii was lower than upper;2)The physical properties of soil at different slope locations are different.The soil bulk density on the slope is equal to under the slope,and the soil bulk density increases with the increase of soil depth;Total soil porosity,capillary porosity,maximum water absorption and storage capacity,saturated water storage capacity:slope up is less than slope down,soil non capillary porosity,maximum retained water storage:slope up is more than slope down;The total porosity,capillary porosity,non capillary porosity,maximum water absorption and storage capacity,maximum retained water storage capacity decreased with the increase of soil depth;3)There are differences in soil nutrients at different slope positions.Soil pH,organic carbon and total nitrogen are higher on the slope than on the slope.Alkali hydrolyzable nitrogen,total phosphorus,available phosphorus,total potassium and available potassium are higher on the slope than on the slope;4)In addition to soil total phosphorus and available phosphorus,soil pH,organic carbon,total nitrogen,alkali hydrolyzable nitrogen,total potassium and available potassium decreased with the increase of soil depth.In general,the soil under the slope has stronger water storage capacity,more adequate nutrient content and better growth of Larix principis-rupprechtii.

关 键 词：华北落叶松 坡位 土壤养分 土壤物理性质 京西水源保护林 

分 类 号：S791.22[农业科学—林木遗传育种] S714.2[农业科学—林学]