生活污水慢渗对‘中林2001’杨树人工林生长的影响

生活污水慢渗对‘中林2001爷杨树人工林生长的影响*白保勋1摇樊摇巍2摇杨海青2摇卞新民1**摇赵摇辉2(1南京农业大学资源与环境科学学院,南京210095;2河南省林业科学研究院生态林业工程技术研究中心,郑州450008)摘摇要摇采用不同污水水力负荷(每周0、3、6、9、12、15cm),在‘中林2001爷杨树人工林林地进行了污水慢渗试验.结果表明:不同负荷生活污水处理使‘中林2001爷杨树人工林土壤平均有机质、全氮、全磷、全钾和Na+含量分别比对照(0cm)增加1郾940、0郾115、0郾029、1郾454和0郾030g·kg-1;在较低水力负荷(3~12cm)时,杨树平均总生长量增加17郾583t·hm-2·a-1,各器官的平均氮、磷、Na+含量分别增加3郾086、0郾645和0郾121g·kg-1,水力负荷在每周6~12cm时,杨树平均总生长量和各器官平均氮、磷、Na+含量达到最大值(36郾252t·hm-2·a-1、13郾162g·kg-1、5郾137g·kg-1、0郾361g·kg-1),负荷继续升高则有所下降.杨树各器官钾含量随着水力负荷的增加而降低;污水处理使杨树的叶长增加,叶不对称性减少、使林木延迟落叶.当水力负荷>每周12cm时,土壤中较高的Na+和水分含量将危害杨树生长.适宜‘中林2001爷杨树人工林生长的污水水力负荷在每周3~12cm.关键词摇污水慢渗摇林木生长量摇养分含量摇Na+含量摇叶长摇叶不对称性摇污水胁迫文章编号摇1001-9332(2011)06-1403-06摇中图分类号摇S152郾7,S512郾1摇文献标识码摇AEffectsofdomesticwastewaterslowinfiltrationonthegrowthofpoplar‘Zhonglin2001爷plantation.BAIBao鄄xun1,FANWei2,YANGHai鄄qing2,BIANXin鄄min1,ZHAOHui2(1CollegeofResourcesandEnvironmentalSciences,NanjingAgriculturalUniversity,Nanjing210095,China;2ForestryEcologicalEngineeringResearchCenter,HenanAcademyofForestry,Zhengzhou450008,China).鄄Chin.J.Appl.Ecol.,2011,22(6):1403-1408.Abstract:Aslowinfiltrationexperimentwithdifferenthydraulicloads(0,3,6,9,12,and15cmperweek)ofdomesticwastewaterwasconductedina‘Zhonglin2001爷poplarplantationtostudytheeffectsofthewastewaterslowinfiltrationonthegrowthoftheplantation.Comparingwiththecontrol(0cm),theotherfivetreatmentsincreasedthesoilorganicmatter,totalN,totalP,totalK,andNa+contentsintheplantationaveragelyby1郾940g·kg-1,0郾115g·kg-1,0郾029g·kg-1,1郾454g·kg-1and0郾030g·kg-1,respectively郾Atlowerhydraulicloads(3-12cmperweek),thepoplarbiomassgrowthandtheN,PandNa+contentsindifferentpoplaror鄄gansaveragelyincreasedby17郾583t·hm-2·a-1,3郾086g·kg-1,0郾645g·kg-1,and0郾121g·kg-1,withthemaximum(36郾252t·hm-2·a-1,13郾162g·kg-1,5郾137g·kg-1,and0郾361g·kg-1,respectively)athydraulicloads6-12cmperweek.Thefurtherincreaseofthehy鄄draulicloaddecreasedthepoplarbiomassgrowthandtheN,PandNa+contentsindifferentpoplarorgans.TheKcontentindifferentpoplarorgansdecreasedwithincreasinghydraulicload.Treatingwithdome