北方农牧交错带人工林土壤理化性质分布格局
杨红玲, 姚博, 苏永中, 李玉霖

Distribution pattern of soil physical and chemical properties of plantation forest in northern agro-pastoral ecotone
Hongling Yang, Bo Yao, Yongzhong Su, Yulin Li
表1 北方农牧交错带人工林样点基本信息
Table 1 Basic informetion of sample sites of plantation forests in the agro-pastoral ecotone of Northern China
项目乔木林灌木林
样点个数16768
优势种杨树(Populus przewalskii)、樟子松(Pinus sylvestris var.mongolica)、油松(Pinus tabulaeformis锦鸡儿属(Caragana)、山杏(Prunus sibirica)、黄柳(Salix gordejevii)
经度/(°E)107.76—122.57107.45—122.22
纬度/(°N)37.49—46.1037.36—45.65
海拔/m351~1628307~1566
年均气温/℃1.82~8.943.59~8.83
年降水量/mm336.72~507.23357.42~442.23
干燥度指数1.01~1.711.14~1.62
胸径/cm29.51~98.04
树高/m6.29~21.681.63~6.81