摘要
城市绿地灌溉是再生水回用的主要途径,但我国目前尚无专门针对再生水绿地灌溉的水质控制标准。取再生水全盐量975～7100mg·L-1,对苗期高羊茅(FestucaarundinaceaSchreb.)和早熟禾(PoapratensisL.)进行水培试验,研究其生物量、光合速率、叶绿素总量、过氧化氢酶活性受再生水全盐量的影响。结果表明,随再生水中全盐量的增加,早熟禾的各项生理指标下降明显,高羊茅的抗逆性有所提高,表现为过氧化氢酶活性有增加的趋势。经数据分析得出再生水灌溉高羊茅、早熟禾,其全盐量应分别低于1900、1400mg·L-1。
Green land irrigation is a main aspect of reclaimed water reuse. However, guidelines or standards of reclaimed water quality for green land irrigation have not yet been promulgated in China. In this research, the range of total dissolved solids （TDS） of reclaimed water was 975-7100 mg·L^-1. The effects of TDS on biomass, photosynthetic rate, content of total chlorophyll and activity of catalase （CAT） of seedlings of Festuca arundinacea Schreb. and Poapratensis L. were studied by using the hydroponics experiment. The results showed that all physiological indexes of Poapratensis L. decreased sharply with the increasing concentrations of TDS in reclaimed water. The activity of CAT of Festuca arundinacea Schreb. went up under low concentrations of TDS and decreased under higher density, indicating that the adversity of Festuca arundinacea Schreb. increased in a way. The threshold values of TDS in reclaimed water irrigation for Festuca arundinacea Schreb. and Poapratensis L. should be met TDS ≤ 1900 mg·L^-1 and 1400 mg·L^-1, respectively.
出处
《农业环境科学学报》
CAS
CSCD
北大核心
2005年第6期1229-1232,共4页
Journal of Agro-Environment Science
基金
国家863课题"都市再生水灌溉绿地水质控制指标及安全性评价"(2002AA2Z428111)
关键词
再生水
全盐量
灌溉绿地
高羊茅
早熟禾
reclaimed water
total dissolved solids
green land irrigation
Festuca arundinacea Schreb
Poapratensis L
