冀西北不同坡位油松林土壤理化性质差异  

Soil physical and chemical properties of Pinus tabulaeformis forest at different slope positions in northwest Hebei Province

作　　者：贾茜[1] 宋淑霞 曹航 郭建军 杨新兵[3] JIA Qian;SONG Shuxia;CAO Hang;GUO Jianjun;YANG Xinbing(Baoding Vocational and Technical College,Baoding 071000,China;Forest Pest Control and Quarantine Station of Zhangjiakou,Zhangjiakou 075000,China;College of Forestry,Hebei Agricultural University,Baoding 071000,China;Saibei Forest Farm of Zhangjiakou City,State-Owned Forest Farm Administration Office of Zhangjiakou City,Zhangjiakou 075000,China)

机构地区：[1]保定职业技术学院,河北保定071000 [2]张家口市森林病虫害防治检疫站,河北张家口075000 [3]河北农业大学林学院,河北保定071000 [4]张家口市塞北林场(市国有林场管理处),河北张家口075000

出　　处：《林业与生态科学》2022年第3期251-257,共7页Forestry and Ecological Sciences

基　　金：河北省水利科技计划项目(2021-43);中央财政林业科技推广示范资金项目(冀sfq[2020]003号)。

摘　　要：为探究坡位对油松林土壤理化性质的影响,以冀西北不同坡位油松林为研究对象,分析不同坡位土壤理化性质差异。结果表明:(1)冀西北油松林土壤容重在1.01~1.09 g/cm^(3)之间变动,土壤容重坡上普遍高于坡下,二者差异显著;垂直梯度土壤容重随土层深度增加而增加。(2)土壤总孔隙度变化范围为43.48%~61.48%,随土层厚度增加而减少,坡上与坡下差异显著,平均来看坡下高于坡上。(3)土壤持水能力坡上与坡下差异较大,坡下总体高于坡上,其土壤饱和持水量最大相差108 t/hm^(2)。(4)土壤养分坡上和坡下总体差异显著,均呈现坡下>坡上;从土壤垂直梯度来看,全氮、全磷与有效磷随土层厚度增加而增加,全钾、碱解氮与速效钾在土层垂直梯度上变化不明显。有机碳随土层厚度增加而减小,土壤pH值坡上与坡下差异不明显。In order to explore the effect of slope position on soil physical and chemical properties of Pinus tabulaeformis forest,this paper took different slope position of P.tabulaeformis forest in northwest Hebei Province as the research object,and analyzed the difference of soil physical and chemical properties of different slope positions.The results showed that:(1)The soil bulk density varied from 1.01 g/cm^(3) to 1.09 g/cm^(3),the soil bulk density on slope was higher than that on slope,and the soil bulk density on vertical gradient increased with the increase of soil depth.(2)The total soil porosity varied from 43.48%to 61.48%,and decreased with the increase of soil thickness.There was a significant difference between the upper slope and the lower slope,and the lower slope was higher than the upper slope on average.(3)The water holding capacity of soil on the upper slope was significantly different from that on the lower slope,with a maximum difference of 108 t/hm^(2) in saturated water holding capacity of soil on the lower slope.(4)There were significant differences in soil nutrients between the upper slope and the lower slope,with the lower slope>the upper slope.From the vertical gradient of soil,total N,total P and available P increased with the increase of soil thickness,while total K,alkali-hydrolyzable N and available K did not change significantly on the vertical gradient of soil layer.Organic carbon decreased with the increase of soil layer thickness,and soil pH value had no obvious difference between the upper slope and the lower slope.

关 键 词：冀西北 坡位 油松林 土壤理化性质 

分 类 号：S728[农业科学—林木遗传育种]