| 冀北山地天然次生林与人工林地上植被层的水文调控功能 |
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| 引用本文： | 李亚男,李倩茹,许中旗,郑春雅.冀北山地天然次生林与人工林地上植被层的水文调控功能[J].水土保持通报,2015,35(6):230-234. |
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| 作者姓名： | 李亚男 李倩茹 许中旗 郑春雅 |
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| 作者单位： | 河北农业大学 林学院, 河北 保定 071000;中国科学院 地理科学与资源研究所, 北京 100101;河北农业大学 林学院, 河北 保定 071000;河北农业大学 林学院, 河北 保定 071000 |
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| 基金项目： | 林业公益性行业科研专项"燕山山地典型森林类型健康经营技术"(20100400205);河北省科技厅科技支撑项目(10236728) |
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| 摘 要： | 目的]比较冀北山地天然次生杨桦林(13,18和28a)和人工落叶松林(9,13,15和30a)地上植被层(林冠层、凋落物)的水文调控功能,为评估两种森林类型的转化对该地区水文过程的影响提供科学依据。方法]采用标准样地和测定分析法对林分的生物量、凋落物及其持水量的进行测算。结果](1)不同林龄的人工落叶松林地上植被层的降水截留量均大于天然次生杨桦林,且差异显著。(2)两种林分类型不同地上植被层的截留量均表现为:凋落物林冠层灌木层。(3)幼、中龄人工落叶松林的林冠截流量明显大于同龄的天然次生杨桦林,而近熟林,由抚育间伐导致的林分密度下降使得人工落叶松林低于天然次生杨桦林。(4)在各个林龄上,人工落叶松林的凋落物持水量均显著大于天然次生杨桦林,其中13a落叶松为35.36±6.50t/hm2,13a杨桦林为15.79±4.85t/hm2。结论]冀北山地大面积的人工落叶松林地上植被层具有良好的水文调控功能,其水文调控功能不低于甚至高于当地的天然次生杨桦林,对人工林的抚育间伐在一定程度上会使地上植被层的水文调控功能出现一定程度的下降。
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| 关 键 词： | 人工落叶松林 天然次生杨桦林 林冠截留 凋落物 水文调控功能 |
| 收稿时间： | 2014/9/17 0:00:00 |
| 修稿时间： | 2014/10/5 0:00:00 |
Hydrological Regulation by Aboveground Layers of Secondary Poplar-birch Forest and Larch Plantation in Northern Mountain Region of Hebei Province |
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| LI Ya''nan,LI Qianru,XU Zhongqi and ZHENG Chunya.Hydrological Regulation by Aboveground Layers of Secondary Poplar-birch Forest and Larch Plantation in Northern Mountain Region of Hebei Province[J].Bulletin of Soil and Water Conservation,2015,35(6):230-234. |
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| Authors: | LI Ya'nan LI Qianru XU Zhongqi and ZHENG Chunya |
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| Institution: | Forestry College, Agricultural University of Hebei, Baoding, Hebei 071000, China;Institute of Geographic Sciences and Natural Resources Research, Beijing 100101, China;Forestry College, Agricultural University of Hebei, Baoding, Hebei 071000, China;Forestry College, Agricultural University of Hebei, Baoding, Hebei 071000, China |
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| Abstract: | Objective] The hydrological regulation by aboveground vegetation layer of two forest types, including secondary poplar-birch forest(13 a, 18 a, 28 a) and larch plantation(9 a, 13 a, 15 a, 20 a) in the northern mountainous region of Hebei Province, was compared in order to provide a support for evaluating how forests conversion influences the hydrological process in the region.Methods] The litter stock, biomass of different forests and their water interceptions were measured by stardard sample and testing mothods.Results] (1) Water interceptions of aboveground layers of larch plantations were significantly greater than those of secondary poplar-birch forests.(2) Layers of the two forests had different water interception abilities with a rank as:litter >canopy >shrub layer.(3) The canopy interceptions of the larch plantations with young and middle age were better than that of the secondary poplar-birch forests with the same ages, but the near-mature secondary poplar-birch forest performed better than the larch plantation because of the decreased stand density by thinning.(4) Litter water interceptions of larch plantations with different ages were greater than that of secondary poplar-birch forests, e.g. the litter water interceptions of 13 years larch plantation and secondary poplar-birch forests were 35.36±6.50 t/hm2 and 15.79±4.85 t/hm2, respectively.Conclusion] It was concluded that the aboveground layer of larch plantations had remarkable hydrological regulation function, and sometime it was higher than that of the secondary poplar-birch forest in the northern mountainous region of Hebei Province. Forest thinning can lead to the decrease of hydrological regulation of aboveground vegetation layer to some extent. |
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| Keywords: | larch plantation secondary poplar-birch forest canopy interception litter hydrological regulation |
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