保定室外绿墙火焰南天竹的生理变化研究

为了研究越夏期间,保定市室外绿墙上火焰南天竹的生长状态,对自然区域生长基质为草炭、水苔的火焰南天竹及防寒区域生长基质为草炭、水苔的火焰南天竹进行生理指标测定,并用隶属函数对其进行综合评价.结果 表明:绿墙上日平均光照强度变化范围为0.38～20860.76 Lx,基质日均温度变化范围为6.22～29.55℃,日均湿度变化范围为12.74％～26.40％时,火焰南天竹叶绿素含量及保护酶活性变化规律为升一降;MDA变化规律为降-升-降;营养物质变化规律为升-降-升.自然区域草炭、自然区域水苔、防寒区域草炭、防寒区域水苔基质处理下火焰南天竹叶绿素含量均值分别比CK增加了26.21％、13.71％、66.13％、50.81％;SOD均值分别比CK增加了22.27％、10.44％、37.79％、27.96％;POD均值分别比CK增加了33.22％、15.16％、66.45％、48.19％;可溶性糖含量均值分别比CK增加了53.45％、33.47％、14.53％、89.44％;可溶性蛋白含量均值分别比CK增加了14.22％、6.77％、28.33％、21.69％;MDA含量均值分别比CK降低了31.52％、14.63％、50.84％、35.48％.防寒区域火焰南天竹叶绿素、SOD、POD、可溶性糖、可溶性蛋白含量均值分别比自然区域增加了32.10％、14.20％、26.68％、51.51％、13.14％,MDA含量均值下降了21.62％.各处理下火焰南天竹抗性由强到弱依次为防寒区域草炭基质、防寒区域水苔基质、自然区域草炭基质、自然区域水苔基质.综上所述,防寒区域草炭基质处理最有利于火焰南天竹生长.

Study on physiological changes of Nandina domestica 'firepower' on outdoor green wall in Baoding

In order to study the growth state of Nandina domestica 'Firepower' on the outdoor green wall in Baoding during summer, the physiological indexes of Nandina domestica 'Firepower' with peat and water moss as the growth matrix in natural area and Nandina domestica 'Firepower' with peat and water moss as the growth matrix in cold proof area were measured, and their comprehensive evaluation was carried out by membership function. The results showed that when the variation range of daily average light intensity on the green wall was 0.38-20 860.76 LX, the variation range of daily average temperature of substrate was 6.22-29.55 ℃, and the variation range of daily average humidity was 12.74%-26.40%, the changes of chlorophyll content and protective enzyme activity were ascending-descending; the change rule of MDA was descending-ascending-descending; the law of nutrient materialization was ascending-descending-ascending. The Nandina domestica 'Firepower' under the treatment of peat, water moss, peat in cold proof area and water moss in cold proof area compare with CK, the average content of chlorophyll increased by 26.21%, 13.71%, 66.13% and 50.81% respectively; The mean value of SOD increased by 22.27%, 10.44%, 37.79%, 27.96% respectively; The mean value of POD activity increased by 33.22%, 15.16%, 66.45%, 48.19% respectively; The average content of soluble sugar increased by 53.45%, 33.47%, 14.53%, 89.44% respectively; The average content of soluble protein increased by 14.22%, 6.77%, 28.33%, 21.69% respectively; The mean content of MDA decreased by 31.52%, 14.63%, 50.84%, 35.48% respectively. Compared with the natural area, the average contents of chlorophyll, SOD, POD, soluble sugar and soluble protein of Nandina domestica 'Firepower' in the cold proof area increased by 32.10%, 14.20%,26.68%,51.51% and 13.14% respectively, and the mean content of MDA decreased by 21.62%. From strong to weak, the resistance of Nandina domestica 'Firepower' under each treatment was peat matrix in cold proof area, water moss matrix in cold proof area, peat matrix in natural area and water moss matrix in natural area.Therefore, the treatment of peat matrix in cold proof area was the most conducive to the growth of Nandina domestica 'Firepower'.