屋顶绿化草坪草蒸散量与土壤水分阈值研究  

Research on Evapotranspiration and Soil Moisture Threshold of Roof Greening Turf-grass

作　　者：宋玉飞 李海梅[1] 刘霞 汤新[1] 刘晓[1] 

机构地区：[1]青岛农业大学园林与林学院,山东青岛266109 [2]山东绿城市政园林工程有限公司,山东聊城252000

出　　处：《北方园艺》2016年第19期101-105,共5页Northern Horticulture

基　　金：山东省青年基金资助项目(BS2012NY005);研究生创新计划资助项目(760-1425);大学生创新计划资助项目(1105001);青岛市科技局资助项目(13-1-4-165-jch)

摘　　要：以屋顶绿化中主要应用的3种草坪草（草地早熟禾、多年生黑麦草、狗牙根）为试材,分别进行充足灌水与限制灌水处理,对其蒸散量及土壤水分阈值进行研究。结果表明：充分灌水组和限制灌水组试验期内蒸散量均表现为黑麦草〉狗牙根〉早熟禾,且充分灌水组草坪的蒸散量要大于限制灌水组草坪的蒸散量,得出最佳土壤水分阈值狗牙根为66.0%-82.6%,黑麦草为59.7%-70.3%,早熟禾为62.5%-81.9%,并由此得出狗牙根需补充灌溉5次,每次灌溉量为25.9mm;黑麦草需补充灌溉9次,每次16.5mm;早熟禾需补充灌溉4次,每次30.3mm。Three kinds of turf-grass（Poa pratensis ,Lolium perenne ,Cynodon dactylon） which usually planted on roof were used as material,two groups which one was full irrigation and the other one was limited irrigation were set, the ET and photosynthetic physiology process of the turf-grass were measured. The results showed that during the experimental period the two kinds of irrigation group both behaves as Loliurn perenne〉Cynodon dactylon〉Poa pratensis, meanwhile the evapotranspiration of turf-grass in full irrigation group was greater than the limited irrigation group. Besides, the suitable soil moisture scope was acquired, Poa pratensis 62. 5 % - 81.9 %, Cynodon dactylon 66. 0 % - 82. 6 %, Loliurn perenne 59. 7%-70. 3% and the most suitable irrigation volume was determined. Three turf-grass demand supplementary irrigation five times,nine times and four times, and the supplementary irrigation quantity were 25. 9 mm, 16. 5 mm and 30. 3 mm once.

关 键 词：草坪草 蒸散量 光合生理 土壤水分阈值 

分 类 号：TU985.125[建筑科学—城市规划与设计]