【摘要】 采用野外径流小区实验,以自然裸露坡地为对照,利用2013年赣北第四纪红壤坡地的降雨和产流过程数据,在分析日降雨特征的基础上,研究了不同植物措施对次降雨条件下的坡面产流峰值及年产流量的消减效果。结果表明:(1)全年侵蚀性降雨季节分布不均,主要集中在3—6月份,降雨量占全年的80.3%,且暴雨及大暴雨多发;(2)降雨量及最大时段侵蚀性雨强I60对坡面产流量有显著的影响,坡面产流量与PI60呈极显著的线性相关关系;(3)不同植物措施对坡面最大时段径流峰值及年总径流深的消减效果,以柑橘+百喜草全园覆盖措施为最好,其次为柑橘+百喜草带措施,柑橘纯林则最差。更多还原

【Abstract】 Comparing with bare red soil slope(CK),the reduction effects of different vegetation measures on peak value of slope runoff yield and annual runoff yield were investigated through field observation in runoff plots,based on the analysis of daily precipitation and runoff process data of the Quaternary red soil slope in the north of Jiangxi province in 2013.The results showed that:(1)The seasonal distribution of annual erosive rainfall was uneven.The precipitation during March to June accounted for 80.3% of total precipitation in a whole year,and rainstorm and heavy rainstorm happened frequently during this period.(2)Slope-runoff yield was highly positively correlated with the maximum erosive rainfall intensity I60,which indicated that rainfall amount and I60 had significant influences on slope-runoff yield.(3)Different vegetation measures differed in their reduction effects on peak value of runoff yield and annual total runoff depth,which followed the sequence of citrus+complete coverage of Paspalum natatu>citrus+partial coverage of Paspalum natatu>pure citrus.更多还原