| 中间锦鸡儿冠层降雨再分配特征 |
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| 引用本文： | 田娜,古君龙,杨新国,王磊,王兴,陈林,宋乃平.中间锦鸡儿冠层降雨再分配特征[J].干旱区研究,2019,36(4):854-862. |
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| 作者姓名： | 田娜 古君龙 杨新国 王磊 王兴 陈林 宋乃平 |
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| 作者单位： | 宁夏大学西北退化生态系统恢复与重建教育部重点实验室,宁夏银川750021;宁夏大学西北土地退化与生态恢复省部共建国家重点实验室培育基地,宁夏银川750021;宁夏大学西北退化生态系统恢复与重建教育部重点实验室,宁夏银川750021;宁夏大学西北土地退化与生态恢复省部共建国家重点实验室培育基地,宁夏银川750021;宁夏大学西北退化生态系统恢复与重建教育部重点实验室,宁夏银川750021;宁夏大学西北土地退化与生态恢复省部共建国家重点实验室培育基地,宁夏银川750021;宁夏大学西北退化生态系统恢复与重建教育部重点实验室,宁夏银川750021;宁夏大学西北土地退化与生态恢复省部共建国家重点实验室培育基地,宁夏银川750021;宁夏大学西北退化生态系统恢复与重建教育部重点实验室,宁夏银川750021;宁夏大学西北土地退化与生态恢复省部共建国家重点实验室培育基地,宁夏银川750021;宁夏大学西北退化生态系统恢复与重建教育部重点实验室,宁夏银川750021;宁夏大学西北土地退化与生态恢复省部共建国家重点实验室培育基地,宁夏银川750021;宁夏大学西北退化生态系统恢复与重建教育部重点实验室,宁夏银川750021;宁夏大学西北土地退化与生态恢复省部共建国家重点实验室培育基地,宁夏银川750021 |
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| 基金项目： | 国家自然科学基金;一流学科建设项目;宁夏大学西部一流大学建设项目 |
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| 摘 要： | 以荒漠草原人工中间锦鸡儿(Caragana intermedia)灌丛为对象,研究降雨量及降雨强度对两类形态灌丛(健康组和退化组)穿透雨、树干茎流和冠层截留的影响。结果表明:①试验期间共观测到有效降雨33次,以中小降雨事件为主,总降雨量为251mm,次平均降雨量和平均降雨强度分别为7.6mm和1.14mm·h^-1,其中降雨量<2mm,降雨强度<1mm·h^-1的降雨事件出现次数最多。②健康组和退化组中间锦鸡儿平均穿透雨率、树干茎流率和冠层截留率分别为66.7%、8.5%、24.8%和75.4%、8.7%、16.0%,两类形态灌丛之间穿透雨和截留存在显著差异(P<0.05)。③两类形态灌丛的穿透雨量、树干茎流量、截留量与降雨量成线性函数、对数函数和幂函数关系,且其穿透雨率、树干茎流率和截留率与降雨量、降雨强度之间成对数函数和幂函数关系。灌丛形态退化显著改变了冠层降雨再分配格局,冠层截留显著降低,穿透雨显著增加,潜在提高了降水对土壤水分的直接补充,一定程度上有利于人工中间锦鸡儿稳定性的维持。
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| 关 键 词： | 荒漠草原 中间锦鸡儿 穿透雨 树干茎流 截留 形态退化 毛乌素沙地 |
Redistribution of Rainfall in Canopy of Caragana intermedia |
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| TIAN Na,GU Jun-long,YANG Xin-guo,WANG Lei,WANG Xing,CHEN Lin,SONG Nai-ping.Redistribution of Rainfall in Canopy of Caragana intermedia[J].Arid Zone Research,2019,36(4):854-862. |
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| Authors: | TIAN Na GU Jun-long YANG Xin-guo WANG Lei WANG Xing CHEN Lin SONG Nai-ping |
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| Institution: | (Key Laboratory for Degenerated Ecosystem in Northwest China under the Ministry of Education,Ningxia University,Yinchuan 750021 ,Ningxia,China;Breeding Base for State Key Laboratory of Land Degradation and Ecological Restoration in Northwest China,Yinchuan 750021 ,Ningxia,China) |
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| Abstract: | In this study,the effects of rainfall and its intensity on the throughfall,stemflow and interception of two kinds of shrubberies (healthy and degenerated groups) of Caragana intermedia planted in a desert steppe were examined. Results showed that:① 33 effective rainfall events were observed during the experiment,and the total volume,average volume and average intensity of rainfall were 251 mm,7. 6 mm and 1. 14 mm·h^-1,respectively. In which the frequency of rainfall events with volume 2 mm and intensity 1 mm·h^-1 was the highest.② There were the significant differences (P < 0. 05) in the throughfall and interception between the healthy and degenerated groups,and the average percentages of throughfall,stemflow and interception were 66. 7%,8. 5% and 24. 8% in the healthy group and 75. 4%,8. 7% and 16. 0% in the degenerated group,respectively.③ The throughfall,stemflow and interception of the two kinds of shrubberies had the linear,logarithmic and power functions with rainfall,and the percentages of throughfall,stemflow and interception had the logarithmic and power relationships with rainfall and rainfall intensity. The morphological degeneration of the shrubberies changed significantly the redistribution pattern of rainfall in canopy,thus the canopy interception was significantly reduced,but the throughfall was significantly increased,which were beneficial to potentially improve soil moisture content and maintain the stability of C.intermedia shrubberies. |
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| Keywords: | desert steppe Caragana intermedia throughfall stemflow interception morphological degeneration Mu Us Desert |
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