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应用生态学报 ›› 2012, Vol. 23 ›› Issue (09): 2383-2389.

• 研究报告 • 上一篇    下一篇

黄土高原丘陵沟壑区柠条和沙棘灌丛的降雨截留特征

荐圣淇,赵传燕**,方书敏,余凯,王阳,柳逸月,郑祥霖,彭守璋   

  1. (兰州大学草地农业生态系统国家重点实验室, 兰州 730000)
  • 出版日期:2012-09-18 发布日期:2012-09-18

Characteristics of rainfall interception by Caragana korshinskii and Hippophae rhamnoides in Loess Plateau of Northwest China.

JIAN Sheng-qi, ZHAO Chuan-yan, FANG Shu-min, YU Kai, WANG Yang, LIU Yi-yue, ZHENG Xiang-lin, PENG Shou-zhang   

  1. (State Key Laboratory of Grassland Agroecosystems, Lanzhou University, Lanzhou 730000, China)
  • Online:2012-09-18 Published:2012-09-18

摘要: 2011年5—10月,以黄土高原人工造林的主要灌木树种柠条和沙棘为对象,研究了降雨量及降雨强度对其截留量、穿透雨量和树干茎流量的影响.研究期间共观测到降雨47次,以小降雨事件为主,年降雨总量为208.9 mm,平均降雨强度为2.82 mm·h-1,其中降雨量为2~10 mm,降雨强度为0.1~2 mm·h-1的降雨事件出现次数最多.柠条和沙棘的截留量、穿透雨量、树干茎流量分别为58.5 mm、124.7 mm、25.7 mm和38.2 mm、153.1 mm、17.6 mm,分别占降雨量的28%、59.7%、12.3%和18.3%、73.3%、8.4%.柠条和沙棘的截留量、穿透雨量和树干茎流量与降雨量均呈显著正相关,并且两种灌木的截留率、穿透雨率和树干茎流率与降雨量、最大10 min雨强之间均呈指数相关或幂函数相关.

Abstract: From May to October 2011, an investigation was conducted on the effects of rainfall and its intensity on the canopy interception, throughfall, and stemflow of Caragana korshinskii and Hippophae rhamnoides, the main shrub species commonly planted to stabilize soil and water in the Anjiagou catchment of Loess Plateau. A total of 47 rainfall events were observed, most of which were featured with low intensity, and the total amount and average intensity of the rainfalls were 208.9 mm and 2.82 mm·h-1, respectively. As a whole, the rainfall events of 2-10 mm and 0.1-2 mm·h-1 had the highest frequency. The canopy interception, throughfall, and stemflow of C. korshinski were 58.5 mm (28%), 124.7 mm (59.7%), and 25.7 mm (12.3%), while those of H. rhamnoides were 17.6 mm (8.4%), 153.1 mm (73.3%), and 38.2 mm (18.3%), respectively. Regression analysis showed that the canopy interception, throughfall, and stemflow of the two shrub species all had significant positive correlations with the rainfall amount, and had exponent or power correlations with the rainfall amount and the maximum rainfall intensity in 10 minutes.