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应用生态学报 ›› 2011, Vol. 22 ›› Issue (06): 1403-1408.

• 研究报告 • 上一篇    下一篇

生活污水慢渗对‘中林2001’杨树人工林生长的影响

白保勋1,樊巍2,杨海青2,卞新民1**,赵辉2   

  1. 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
  • 出版日期:2011-06-18 发布日期:2011-06-18

Effects of domestic wastewater slow infiltration on the growth of poplar ‘Zhonglin 2001’ plantation.

BAI Bao-xun1, FAN Wei2, YANG Hai-qing2, BIAN Xin-min1, ZHAO Hui2   

  1. 1College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China;2Forestry Ecological Engineering Research Center, Henan Academy of Forestry, Zhengzhou 450008, China
  • Online:2011-06-18 Published:2011-06-18

摘要: 采用不同污水水力负荷(每周0、3、6、9、12、15 cm),在‘中林2001’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’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(0 cm)增加1.940、0.115、0.029、1.454和0.030 g·kg-1;在较低水力负荷(3~12 cm)时,杨树平均总生长量增加17.583 t·hm-2·a-1,各器官的平均氮、磷、Na+含量分别增加3.086、0.645和0.121 g·kg-1,水力负荷在每周6~12 cm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(36.252 t·hm-2·a-1、13.162 g·kg-1、5.137 g·kg-1、0.361 g·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12 cm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’杨树人工林生长的污水水力负荷在每周3~12 cm.

关键词: 污水慢渗, 林木生长量, 养分含量, Na+含量, 叶长, 叶不对称性, 污水胁迫

Abstract: A slow infiltration experiment with different hydraulic loads (0, 3, 6, 9, 12, and 15 cm per week) of domestic wastewater was conducted in a ‘Zhonglin 2001’ poplar plantation to study the effects of the wastewater slow infiltration on the growth of the plantation. Comparing with the control (0 cm), the other five treatments increased the soil organic matter, total N, total P, total K, and Na+ contents in the plantation averagely by 1.940 g·kg-1, 0.115 g·kg-1, 0.029 g·kg-1, 1.454 g·kg-1 and 0.030 g·kg-1, respectively At lower hydraulic loads (3-12 cm per week), the poplar biomass growth and the N, P and Na+ contents in different poplar organs averagely increased by 17.583 t·hm-2·a-1, 3.086 g·kg-1, 0.645 g·kg-1, and 0.121 g·kg-1, with the maximum (36.252 t·hm-2·a-1, 13.162 g·kg-1, 5.137 g·kg-1, and 0.361 g·kg-1, respectively) at hydraulic loads 6-12 cm per week. The further increase of the hydraulic load decreased the poplar biomass growth and the N, P and Na+ contents in different poplar organs. The K content in different poplar organs decreased with increasing hydraulic load. Treating with domestic wastewater increased the leaf length, decreased the leaf asymmetry, and delayed leaf- falling. At high hydraulic load (15 cm per week), the higher soil Na+ and water contents would threat the poplar growth. The proper domestic wastewater hydraulic loads for the growth of poplar ‘Zhonglin 2001’ plantation would be 3-12 cm per week.

Key words: wastewater slow infiltration, tree biomass growth, nutrient content,  , Na+ content, leaf length, leaf asymmetry, wastewater stress