摘要
为了辨明成熟期玉米对降雨的再分配作用,有效地防治区域水土流失,采用人工模拟降雨的方法,就川西低山丘陵区成熟期玉米植株对降雨的冠层截留量、茎秆流量和穿透雨量的作用进行了研究。结果表明:冠层截留率平均为7.5%,茎秆流率平均为28.8%,穿透雨率平均为63.7%。随着降雨强度的增加,单位时间内玉米冠层的截留量呈增加趋势,但随着玉米植株的叶面积增大,有效截留量却呈减少趋势,株高和角度对它的影响较小。随着叶面积和降雨强度的增加,茎秆流量呈增加趋势,角度影响较小。随着叶面积的增加,穿透雨量呈减少趋势;而随着降雨强度的增加,单位时间内穿透雨的数量呈增加的变化趋势,株高影响较小。
In order to clarify the role of the mature corn in the distribution of rainfall and effectively prevent regional soil erosion,effect of maize plants in maturity stage on canopy interception,throughfall and stemflow were analyzed in hilly region in the western Sichuan Province by using the field method of artificial rainfall.The results showed that the average of throughfall,stemflow and canopy interception amounts were 7.5%,28.8% and 63.7%,respectively.The interception of corn canopy showed an increasing trend with the increase of rainfall intensity,and the effective interception showed decreasing trend with the increase of corn plant leaf area.However,there was no significant correlation between the canopy interception,the height and the angle of leaf.Stem flow showed an increasing trend with the increase of leaf area and rainfall intensity.However,there was no significant correlation between the stem flow and the angle of leaf.The throughfall showed a decreasing trend with the increase of leaf area and showed the increasing trend in the number of throughfall with the increase of rainfall intensity.However,there was no significant correlation between the throughfall and the height.
出处
《水土保持研究》
CSCD
北大核心
2012年第4期72-76,共5页
Research of Soil and Water Conservation
基金
国家自然科学基金资助项目(40901138)
国家科技支撑计划子课题(2008BAD98B03)
四川省科技厅应用基础项目(2008JY0022)
地表过程与资源生态国家重点实验室开放基金资助项目(2008-KF-05)
中国科学院山地灾害与地表过程重点实验室开放研究基金资助项目
关键词
玉米
模拟降雨
冠层截留
茎秆流
穿透雨量
maize
simulated rainfall
canopy interception
stemflow
throughfall
