干旱胁迫下不同组分建筑废弃物基质对佛甲草生理特征的影响  

Effects of Construction Waste Substrates on Physiological Characteristics of Sedum lineare under Drought Stress

作　　者：田艺文 邹维娜 秦秉铎 江南 唐惠玲 Tian Yiwen;Zou Weina;Qin Bingduo;Jiang Nan;Tang Huiling(College of Ecological Technology and Engineering,Shanghai Institute of Technology,Shanghai 201418,China;Institute of Beautiful China and Ecological Civilization,University Think Tank of Shanghai Municipality,Shanghai 201418,China)

机构地区：[1]上海应用技术大学生态技术与工程学院,上海201418 [2]美丽中国与生态文明研究院上海高校智库,上海201418

出　　处：《山东农业科学》2023年第9期64-71,共8页Shandong Agricultural Sciences

基　　金：上海市科技创新行动计划项目(19DZ1204006);上海市高校智库内涵建设项目(1021ZK215005-A06)。

摘　　要：建筑废弃物已成为屋顶绿化基质原材料中替代珍珠岩、蛭石等天然矿物的潜在资源。为研究干旱胁迫下建筑废弃物基质对低维护屋顶绿化植物生长的影响,以典型屋顶绿化植物佛甲草(Sedum lineare)为试材,温室盆栽条件下模拟干旱生长环境,分析3个建筑废弃物基质处理(T1、T2、T3,无机材料分别为碎砖颗粒、碎混凝土颗粒、两者的混合物)和1个常规轻质基质处理(CK,无机材料为珍珠岩和蛭石)下,佛甲草株高、根长、鲜重、干重、覆盖度、叶片相对含水量及叶片叶绿素、丙二醛、脯氨酸含量的变化。结果表明,无机基质材料为碎砖颗粒处理(T1)的佛甲草维持生长最久、植株最健壮、覆盖度最大,叶片叶绿素含量增幅最大、丙二醛含量波动最小、脯氨酸含量最高、相对含水量最高;CK和混合基质处理(T3)的佛甲草长势和抗逆性较好;无机基质材料为碎混凝土颗粒处理(T2)的佛甲草长势最差。基质总孔隙度与佛甲草叶片叶绿素、脯氨酸含量及相对含水量均呈显著正相关,与叶片丙二醛含量呈显著负相关。综上,建筑废弃物碎砖与碎混凝土颗粒可用于屋顶绿化基质配制,以碎砖颗粒处理的效果更好,可以取得与天然矿物材料相近甚至更优的栽培效果。本研究可为佛甲草栽培和建筑废弃物基质利用提供理论依据和实践参考。Construction waste has become a potential resource to replace perlite,vermiculite and other natural minerals in the raw materials for green roof substrates.In order to study the effect of construction waste substrates on extensive green roof plants under drought stress,Sedum lineare was used as experimental material,drought conditions were simulated by potting experiments in greenhouse,the changes of plant height,root length,fresh weight,dry mass,coverage,relative water and contents of chlorophyll,malondialdehyde,proline of S.lineare leaves were analyzed under three construction waste substrates(T1,T2 and T3 with crushed brick particles,crushed concrete particles and their mixture as inorganic materials,respectively)and one conventional light substrate(CK wih pearlite and vermiculite as inorganic materials).The results showed that the plants in the T1 substrate maintained the longest growth,were the strongest,and had the largest coverage,the largest increase of chlorophyll content,the smallest fluctuation of MDA content,the highest proline content and the highest relative water content in leaves.The growth and stress resistance of S.lineare under CK and mixed substrate(T3)treatments were better;the growth of plants cultivated in the T2 substrate was poor.The total porosity of the substrates was significantly positively correlated with chlorophyll content,proline content and relative water content of leaves,and significantly negatively correlated with MDA content.In conclusion,construction waste brick and concrete particles could be used for roof greening substrate preparation,especially the crushed brick particles,which could achieve similar or even better cultivation effects compared with the natural mineral materials.This study could provide theoretical bases and practical references for the cultivation of S.lineare and the utilization of substrates converted from construction waste.

关 键 词：佛甲草 基质 建筑废弃物 干旱胁迫 屋顶绿化 

分 类 号：S682.330.1[农业科学—观赏园艺]