再生水灌溉对草坪草生长速率、叶绿素及类胡萝卜素的影响特征  

Impact characteristics of reclaimed water irrigation on the growth rate,chlorophyll and cartenoids contents of lawn grasses

作　　者：彭致功[1] 杨培岭[1] 任树梅[1] 王勇[1] 

机构地区：[1]中国农业大学水利与土木工程学院,北京100083

出　　处：《农业工程学报》2006年第10期105-108,共4页Transactions of the Chinese Society of Agricultural Engineering

基　　金：863计划子课题(2002AA2z4281-06)

摘　　要：为节约城市清洁水源,扩大再生水利用力度,确保高质量的草坪,以草地早熟禾为研究对象,探讨了不同灌溉水源及再生水灌溉不同水分梯度下草坪草生长速率及叶绿素的变化特征。试验采用7种水分处理:清水适宜灌、混合水适宜灌、再生水充分灌、再生水适宜灌、再生水轻微干旱胁迫、再生水中度干旱胁迫、再生水重度干旱胁迫,灌水下限分别70%fc(田间持水量)、70%fc、80%fc、70%fc、60%fc、50%fc、40%fc,灌水定额相同。研究表明:不同灌溉处理下草坪草生长速率差异明显,再生水灌溉促进了草坪草的生长,草坪草生长速率与供水量成正相关;再生水灌溉下草坪草叶绿素及类胡萝卜素含量显著高于清水适宜灌处理下草坪草叶绿素及类胡萝卜素含量,而再生水灌溉草坪草叶绿素及类胡萝卜素含量在处理间差异不显著。In order to save the clean water resources for the purpose of expanding the utilization of reclaimed water and insuring good quality of lawn, the impact characteristics of reclaimed water irrigation on the growth rate and chlorophyll contents of Poa Pratensis were studied. Seven irrigation treatments were conducted ： proper irrigation with fresh water, proper irrigation with 1 ： 1 proportion of fresh and reclaimed water, full irrigation with reclaimed water, proper irrigation with reclaimed water, light water stress irrigation with reclaimed water, medium water stress irrigation with reclaimed water, severe water stress irrigation with reclaimed water. The irrigation start-points were 70%fc（field water capacity）, 70%fc, 80%fc, 70%fc, 60%fc, 50%fc, 40%fc, respectively. For seven treatments, irrigation amount for an irrigation event was the same. The experimental results show that the differences on the lawn grass growth rate were remarkable among the treatments under different irrigated water qualities. The growth rate of lawn grass irrigated with reclaimed water was larger than that of lawn grass irrigated with fresh water. The positive correlations were found between the reclaimed water supply and the growth rate of lawn grass. The chlorophyll contents and the cartenoids contents of lawn grass irrigated with reclaimed water were significantly higher than those of lawn grass irrigated with fresh water. The contents of the chlorophyll and cartenoids had no significant difference among the different water supply treatments irrigated with reclaimed water.

关 键 词：再生水 草地早熟禾 草坪草 生长速率 叶绿素含量 

分 类 号：S275.9[农业科学—农业水土工程] S312[农业科学—农业工程]