摘要
为了解冀北坝上坝下地区华北落叶松林土壤碳汇功能的差异,对河北省北部坝上坝下地区的华北落叶松林的土壤有机碳含量及碳密度进行了对比研究。结果表明,坝下地区华北落叶松人工林各土层土壤有机碳含量高于坝上地区,但其差异随土层深度的变化而有所不同;坝上及坝下地区18年生华北落叶松林土壤有机碳密度未表现出明显差异,分别为15.6 kg/m^(2)和13.2 kg/m^(2);40年生华北落叶松林土壤有机碳密度则有显著差异,分别为21.9 kg/m^(2)和27.9 kg/m^(2);坝上及坝下地区华北落叶松人工林土壤有机碳含量的垂直分布表现出不同的变化趋势,坝上地区土壤有机碳含量随土壤深度增加而下降的趋势较缓,而坝下地区下降趋势更为明显。
In order to understand the differences in soil carbon sink functions of Larix principis-rupprechtii forests in Bashang and Baxia area in northern Hebei Province,a comparative study was carried out on the soil organic carbon content and carbon density of L.principis-rupprechtii forests in the Bashang and Baxia area of Weichang County.The results showed that the soil organic carbon content(SOC)of each soil layer of the L.principis-rupprechtii plantation in the Baxia area was higher than that in the Bashang area,but the difference varies with the depth of the soil.The soil organic carbon density of 18-year-old L.principis-rupprechtii forest in Bashang and Baxia areas showed no significant difference,which was 15.6 kg/m^(2) and 13.2 kg/m^(2),respectively.There were significant differences in soil organic carbon density in 40-year-old L.principis-rupprechtii forests,which was 21.9 kg/m^(2) for Bashang area and 27.9 kg/m^(2) for Baxia area.The soil organic carbon content of L.principis-rupprechtii plantations in the Bashang and Bashang areas showed different changing trends in vertical distribution and the soil organic carbon content in Bashang area decreased slowly with the increase of soil depth,while the decline trend in the lower Baxia area was more sharp.
作者
尹海龙
张乃暄
许中旗
YIN Hailong;ZHANG Naixuan;XU Zhongqi(Saihanba Mechanized Forestry Farm of Hebei Province,Weichang 068466,China;College of Forestry,Hebei Agricultural University,Baoding 071000,China)
出处
《林业与生态科学》
2022年第2期164-168,共5页
Forestry and Ecological Sciences
基金
国家科技支撑计划(2015BAD07B02)
河北省科技计划项目(17236801D)。
关键词
塞罕坝地区
土壤有机碳
华北落叶松
土壤有机碳密度
垂直分布
Saihanba area
soil organic carbon
Larix principis-rupprechtii
soil organic carbon density
vertical distribution
