黑龙江西部半干旱区经济灌木截留能力特征
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黑龙江省林业科学院齐齐哈尔分院

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Characteristics of canopy Interception Ability of economical Shrub for the Semiarid Western Heilongjiang Province
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    摘要:

    [目的]通过对不同灌木冠层截留能力进行研究,为进一步认识该区域灌木林冠层水文生态功能数量特征,筛选利于半干旱地区水源涵养的经济灌木树种提供理论依据。[方法]本文以黑龙江西部具有发展潜力的平榛(Corylus heterophylla)、枸杞(Lycium chinense)、沙棘(Hippophae rhamnoides)、樱桃(Prunus tomentosa)、刺五加(Eleutherococcus senticosus)、山刺玫(Rosa davurica)6种经济灌木为研究对象,通过2023年6-9月15次降雨的监测,对比分析对6种灌木冠层截留特征。[结果]6种灌木的冠层截留能力差异显著(P<0.05),超过70%的降雨以穿透雨形式降落。灌木的穿透率、树干茎流率和冠层截留率变化范围分别为71.47%~91.16%(82.14%)、2.31%~7.46%(4.4%)、6.56%~23.41%(13.65%),冠层截留率表现为毛樱桃>沙棘>平榛>刺玫果>刺五加>枸杞。降雨量是影响灌木冠层降雨截留过程的关键气象要素,6种灌木的穿透雨量、树干茎流量、冠层截留量均和林外降雨呈显著线性正相关(P<0.01),穿透率、茎流率、截留率和林外降雨之间呈对数函数关系。对气象因素、林分特征与冠层截留能力进行相关性分析,截留率和温度(P<0.05)正相关、风速(P<0.01)负相关,除分枝数和穿透率不显著相关外,其余林分特征与树干茎流率、冠层截留率都显著正相关,与穿透率都显著负相关。[结论]不同灌木的截留能力有一定差异性,毛樱桃、平榛、沙棘截留率和茎流率较高,在减少雨水击溅侵蚀,涵养水源方面有优势;枸杞、刺五加、刺玫果具穿透率高,在增加林冠下有效利用水分方面有优势。气象因素、林分特征都在灌木冠层截留过程中发挥重要作用。

    Abstract:

    [Objective] By studying the canopy interception ability of different shrubs, this paper aims to further understand the quantitative characteristics of the hydrological and ecological functions of the shrub canopy in this region and provide a theoretical basis for screening economic shrub species beneficial to water conservation in semi-arid areas.[Methods] In this paper, six economic shrubs with development potential in western Heilongjiang Province, namely Corylus heterophylla, Lycium chinense, Hippophae rhamnoides, Prunus tomentosa, Eleutherococcus senticosus, and Rosa davurica, were taken as the research objects. Through the monitoring of 15 rainfall events from June to September 2023, the canopy interception characteristics of the six shrubs were compared and analyzed.[Results] The canopy interception capacities of the six shrubs were significantly different (P < 0.05), and more than 70% of the rainfall fell in the form of throughfall. The variation ranges of the throughfall rate, stemflow rate and canopy interception rate of the shrubs were 71.47% - 91.16% (82.14%), 2.31% - 7.46% (4.4%), and 6.56% - 23.41% (13.65%) respectively. The canopy interception rate showed the order of Prunus tomentosa > Hippophae rhamnoides > Corylus heterophylla > Rosa davurica > Eleutherococcus senticosus > Lycium chinense, with the rates being 87.89%, 1.61% and 10.50% respectively. (2) Rainfall is the key meteorological factor affecting the rainfall interception process of the shrub canopy. The throughfall amount, stemflow amount and canopy interception amount of the six shrubs all had a significant linear positive correlation with the rainfall outside the forest (P < 0.01), and there was a logarithmic function relationship between the throughfall rate, stemflow rate, interception rate and the rainfall outside the forest. Correlation analysis was conducted on meteorological factors, stand characteristics and canopy interception capacity. The interception rate was positively correlated with temperature (P < 0.05) and negatively correlated with wind speed (P < 0.01). Except that the number of branches was not significantly correlated with the throughfall rate, the other stand characteristics were significantly positively correlated with the stemflow rate and canopy interception rate, and significantly negatively correlated with the throughfall rate.[Conclusion] There are certain differences in the interception capacities of different shrubs. Prunus tomentosa, Corylus heterophylla and Hippophae rhamnoides have relatively high interception rates and stemflow rates, and have advantages in reducing rain splash erosion and conserving water sources. Lycium chinense, Eleutherococcus senticosus and Rosa davurica have high throughfall rates and have advantages in increasing the effectively utilized water under the forest canopy. Both meteorological factors and stand characteristics play important roles in the process of shrub canopy interception.

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  • 收稿日期:2024-12-13
  • 最后修改日期:2025-02-25
  • 录用日期:2025-02-25
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