冀北山地6种林分类型土壤水分-物理性质变化

发布时间：2018-06-01 19:27

  本文选题：冀北山地 + 林分类型　； 参考：《水土保持研究》2017年03期

【摘要】：为改善冀北山地林地生态功能,提高该地区森林涵养水源的能力,选取冀北山地6种典型林分为研究对象,采用环刀法对土壤物理性质进行了分析比较。结果表明:(1)土壤容重与土层深度呈正相关,土壤容重均值排序为:华北落叶松林(1.20g/cm~3)蒙古栎林(1.14g/cm3)油松林(1.12g/cm~3)黑桦林(1.03g/cm~3)白桦林(0.98g/cm~3)山杨林(0.81g/cm~3);(2)土壤总孔隙度与土层深度呈负相关,土壤总孔隙度均值排序为:山杨林(57.6%)白桦林(51.4%)黑桦林(51.1%)油松林(49.1%)华北落叶松林(45.9%)蒙古栎林(44.8%);土壤毛管孔隙度均值山杨林最大(48.9%),油松林最小(35.1%);非毛管孔隙度均值为油松林最大(14.0%),白桦林最小(3.6%);(3)土壤持水量与土层深度之间存在负相关关系,土壤最大持水量均值为山杨林最大,华北落叶松林最小;(4)土壤入渗速率与入渗时间呈明显幂函数关系,稳渗速率油松林最大(15.00mm/min),华北落叶松林最小(0.68mm/min)。研究结果可为森林土壤资源可持续利用提供依据。
[Abstract]:In order to improve the ecological function of forest land and to improve the ability of forest water conservation in the north of Hebei Province, six typical forest stands in the mountainous area of northern Hebei Province were selected as the research objects. The physical properties of the soil were analyzed and compared by means of circular knife method. The results showed that there was a positive correlation between soil bulk density and soil depth, and the order of soil bulk density was 1.20g / cm ~ (3) for North China larch forest (1.14g / cm ~ (3) for Mongolian oak forest (1.12g / cm ~ (3) for Pinus tabulaeformis (1.03g / cm ~ (3) for birch forest (0.98 g / cm ~ (3) for Yang Lin 0.81 g / cm ~ (3 / m ~ (2) soil porosity was negatively correlated with soil depth. The order of soil total porosity mean value is: Yang Lin 57.6) birch forest 51.4) Black birch forest 51.1) Pinus tabulaeformis forest 49.1) North China larch forest 45.9) Mongolian oak forest 44.8%; soil capillary porosity mean value mountain Yang Lin 48.9, Pinus tabulaeformis forest minimum 35.1U; non-capillary porosity mean value 45.9%; mean value of non-capillary porosity is 45.9%, while that of Pinus tabulaeformis forest is 35.1U; and the mean value of non-capillary porosity is 45.9%. There was a negative correlation between soil water holding capacity and soil depth in Pinus tabulaeformis forest and birch forest. The mean value of maximum soil water holding capacity was the highest in mountain Yang Lin and the lowest in Larix gmelinii forest in North China. The relationship between soil infiltration rate and infiltration time was obvious power function. The maximum infiltration rate of Pinus tabulaeformis forest was 15.00 mm / min, and that of North China larch forest was 0.68 mm 路min ~ (-1) 路min ~ (-1). The results can provide the basis for the sustainable utilization of forest soil resources.
【作者单位】： 河北环境工程学院生态学系;河北农业大学林学院;
【基金】：河北省林业厅科技项目“冀北山区森林生态系统健康评价技术研究”(1403451) 林业公益性行业科研专项子课题“冀北山区典型森林生态系统健康经营技术研究与示范”(200804022F)
【分类号】：S714
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本文编号：1965357