| 冀北木兰围场沙荒坡地不同坡位黄柳沙障内枯落物的持水性能 |
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| 引用本文： | 王安宁,蔺鑫,穆枫,李玉灵,李晓红.冀北木兰围场沙荒坡地不同坡位黄柳沙障内枯落物的持水性能[J].北京林业大学学报,2018,40(1):98-107. |
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| 作者姓名： | 王安宁 蔺鑫 穆枫 李玉灵 李晓红 |
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| 作者单位： | 1.河北农业大学林学院，河北 保定 071000 |
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| 基金项目： | 国家重点研发计划项目，河北省高层次人才资助项目 |
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| 摘 要： | 目的研究不同坡位黄柳沙障内枯落物持水性能的差异，为沙漠化土地植被恢复技术研究提供技术依据。方法通过野外采样、室内测定的方法对冀北沙荒地3个坡位(坡顶、坡中、坡底)黄柳沙障内枯落物的蓄积量、持水、吸水和拦蓄能力相关指标进行测定分析。结果(1) 不同坡位枯落物蓄积量、自然含水率差异不明显(P>0.05)，但不同坡位持水、拦蓄能力相关指标均表现为坡中>坡底>坡顶，且坡顶显著小于坡中和坡底(P < 0.05)，枯落物持水性能综合指数也是坡顶最小。坡底吸水率显著高于坡中和坡顶(P < 0.01)。(2)不同坡位枯落物持水、吸水随时间变化趋势相同。枯落物持水率和吸水速率与浸水时间分别满足对数函数和指数函数关系。(3)通过主成分分析确定枯落物持水性能由持蓄水能力和吸水能力两大要素构成，权重分别为0.85和0.15，持蓄水相关指标代表性更强。结论枯落物持水、拦蓄能力是衡量枯落物水源涵养性能的首要因素，其中持水率、最大持水率、最大拦蓄率、有效拦蓄率和蓄积量足以代表枯落物的持蓄水能力。而这几项指标及其枯落物持水性能综合指数均以坡中为最大。坡中是坡面承上启下的关键部位，当地黄柳生物沙障发挥了良好的生态水文作用。
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| 关 键 词： | 黄柳沙障 坡位 枯落物 持水性能 |
| 收稿时间： | 2017-07-03 |
Water holding capacity of litter at different slope positions of sand slope in Salix gordejevii sand barrier of Mulan Paddock of northern Hebei Province,northern China |
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| Wang An-ning,Lin Xin,Mu Feng,Li Yu-ling,Li Xiao-hong.Water holding capacity of litter at different slope positions of sand slope in Salix gordejevii sand barrier of Mulan Paddock of northern Hebei Province,northern China[J].Journal of Beijing Forestry University,2018,40(1):98-107. |
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| Authors: | Wang An-ning Lin Xin Mu Feng Li Yu-ling Li Xiao-hong |
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| Institution: | 1.College of Forestry, Hebei Agricultural University, Baoding 071000, Hebei, China2.Water Resources Bureau of Weichang Man-Meng Nationlity Autonomous County, Chengde 068450, Hebei, China |
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| Abstract: | Objective] The differences of litter water holding capacity at different positions with Salix gordejevii sand barrier were studied to provide technical basis for research on vegetation restoration technology of desertified land. Method] Relative indexes about volume, water retention, water absorption and storage capacity were analyzed through field sampling and indoor measurement. Result] (1) There was no significant difference in litter accumulation and natural moisture content at different slope positions(P > 0. 05), but the index of correlation about water holding rate and interception amount at different positions showed the trend of middle slope > bottom slope > top slope. And top slope was remarkably less than middle slope and bottom (P < 0. 05), and it was minimum for comprehensive index of litter's water holding capacity. Water absorption rate in bottom slope was significantly higher than that of middle slope and top slope(P < 0. 01). (2)The water holding capacity and water absorption of litter remained the same with time at different slope positions. Water holding capacity and soaking time of litter were suitable to logarithmic relation and power exponential relation. (3) The water holding capacity of litter was consisted of two major factors, namely, water holding capacity and water absorbing capacity through principal component analysis. Weights were respectively 0. 85 and 0. 15. Conclusion ] Indicators related to the litter's water holding capacity were the primary factors to evaluate the litter water conservation performance. Among them, water holding rate, maximum water holding rate, maximum interception rate, effective interception rate and volume were enough to represent litter's water holding capacity. Middle slope was the largest concerning the indicators and composite indexes of litter's water holding capacity. The middle slope was a key part of the succession. At the local area, Salix gordejevii sand barrier had played a good ecological and hudrological role. |
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