模拟富营养化污水对垂柳7-10月生长状况及生物量变化的影响  

Changes of Growth State and Biomass of Salix babylonica in Simulated Eutrophic Water During July-October

作　　者：童丽丽[1] 张娟[2] 阮宏华[3] 

机构地区：[1]金陵科技学院,南京210038 [2]合肥市市政设计院有限公司 [3]江苏省林业生态工程重点实验室(南京林业大学)

出　　处：《东北林业大学学报》2011年第12期30-32,共3页Journal of Northeast Forestry University

基　　金：金陵科技学院博士科研启动基金(JIT-B-2009002)

摘　　要：根据国家地表水质量标准和南京市政排水监测站所提供的近5a南京市生活污水中对总氮(TN)和总磷(TP)质量浓度的监测结果,配置了TN质量浓度梯度为2.0、30.0、40.0、80.0 mg/L,TP质量浓度分别为0.4、8.0、15.0、25.0 mg/L的轻度、中轻度、中度、重度模拟富营养化水。以垂柳2年生扦插苗为试材,于2010年7—10月种植于人工污水中,研究该植物的生长状况及生物量的变化,并以南京城区自来水为对照组。结果表明:垂柳幼苗在7—10月84 d试验中,在不同质量浓度富营养化水中,其株高、基径、叶片数均有明显增长(P<0.05),分别增长95.37%、42.51%、195.12%,而生长状况等级增长不明显(P>0.05),只有31.35%;幼苗的地上生物量/地下生物量(A/U值)分别在2.70～4.10,且随富营养化质量浓度的升高而增大;幼苗的相对生长速率分别在0.014 3～湿地中值得大力推广应用。The biennial cutting seedlings of Salix babylonica were planted in the simulated sewage from July to October, 2010 to study the changes of plant growth and biomass, taking tap water in Nanjing City as the control group （CK）. Simulated eutrophic water with different concentrations of total nitrogen as 2.0, 30.0, 40.0, 80.0 mg/L and total phosphorus as 0.4, 8.0, 15.0, 25.0 mg/L were equipped in slight, mild moderate, moderate and severe degrees, according to the state＇s surface water quality standard and the monitoring results of TN and TP concentrations in domestic sewage in the last 5 years in Nanjing provided by Nanjing Municipal Drainage Monitoring Station. Results showed that, during the 84-day period of the experiment, the average height, stem base diameter and leaf numbers of S. babylonica cutting seedlings increased distinctively （P〈0.05）, which increased by 95.37%, 42.51%, 195.12%, respectively; while the grade of growth status increased just a little （P〉0.05）, which only increased by 31.35%. The ratio of above-ground biomass to below-ground biomass of the seedlings ranged from 2.70 to 4.10, and increased with increasing concentration of eutrophic water. The relative growth rate was between 0. 014 3-0.015 0 d-1 , which was higher than that of the CK. S. babylonica shows the characteristics of fast growth, high production, and strong adaptability to eutrophic water; therefore, it can be popularized as a wetland tree species in the constructed wetland.

关 键 词：垂柳幼苗 模拟富营养化污水 生长状况 形态变化 生物量 

分 类 号：X173[环境科学与工程—环境科学] X503.23