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北京地区植被屋面基质厚度对植物生长的影响
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摘要
为研究植被屋面上基质厚度对植物生长的影响,试验在真实屋面环境下,对14种植物在3个基质厚度下(7cm,10cm,15cm)的生长表现进行研究。结果表明基质含水量、植物成活率、覆盖度、景观效果以及生长势与基质厚度呈正相关.基质层越厚,为植物提供的生长环境越好,植物表现得抗逆性越强。反曲景天、六棱景天、‘光亮'假景天、‘胭脂红'景天、红毯景天、鸢尾和观赏葱的适应能力较强,在7cm基质条件下表现良好,有望在北京地区基质厚度7cm以上,配比为草炭:珍珠岩:蛭石:沙为4:3:3:1的屋顶推广应用。
This paper describes an experiment investigating the influence of substrate depth on an extensive green roof.14 plants were tested on three different substrates depths(7cm,10 cm,15cm).It was concluded that,deeper substrate promoted higher survival and coverage,better appearance and growth vigor,as well as higher substrate moisture content In return,plants performed better stress tolerance during the harsh environment on deeper substrate.It also found that there are some species can growth well on 7cm substrate,including Sedum sexangulare,S.album ' Coral Carpet',S.Reflexum,Phedinum spurium ' Coccineum',P.spurium' Splendens',Allium senescens and Iris' Music Box'.Those plants were expected to cultivated on green roofs in Beijing.
引文
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