【摘要】 为定量评估枸杞集流渗灌系统对10 mm以下降雨的收集能力,通过人工模拟降雨控制试验,观测系统内降雨的再分配过程。结果表明:在1～10 mm降雨范围内,枸杞冠层截留量为0.26～0.79 mm,截留率为6.96%～28.15%,其截留量随降雨量增加而增大,但截留率则呈对数下降;覆膜表面的截留量为0.47～0.66 mm,并随降雨量增加而趋于饱和;系统的渗灌器集雨量为0.26～8.37 mm,集雨效率高达26.20%～83.72%,且集雨量和集雨率分别与降雨量呈显著的线性正相关和对数正相关。该研究证实,该集流渗灌系统是一套能对降雨量做出正向响应的高效雨水收集系统,其集雨效率随降雨量增加而显著提升,对于高效利用干旱区宝贵的波动性小雨资源、发展集雨农业具有重要应用价值。更多还原

【Abstract】 To quantitatively evaluate the collection capacity of the runoff-collecting infiltration irrigation system for Lycium barbarum under rainfall events below 10 mm, a controlled experiment using simulated rainfall was conducted to systematically observe the rainfall redistribution process within the system. The results indicated that within the 1-10 mm rainfall range, the canopy interception of Lycium barbarum was 0. 26-0. 79 mm, with an interception rate of 6. 96%-28. 15%. The interception amount increased with rising rainfall, while the interception rate decreased logarithmically. The interception by the mulched surface was 0. 47-0. 66 mm, tending towards saturation as rainfall increased. The collected rainfall amount by the system’s infiltration irrigators was 0. 26-8. 37 mm, achieving a high collection efficiency of 26. 2%-83. 72%. Both the collected rainfall amount and collection rate showed significant positive correlations with the total rainfall, following linear and logarithmic patterns, respectively. It’s confirmed that the runoff-collecting infiltration irrigation system is an efficient rainwater harvesting system that responds positively to rainfall amount, with its collection efficiency significantly improving as rainfall increases. It holds substantial application value for efficiently utilizing precious, highly variable light rainfall resources in arid regions and for developing rainfall-harvesting agriculture.更多还原