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.thm-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.
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·hm2·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.
出处
《应用生态学报》
CAS
CSCD
北大核心
2011年第6期1403-1408,共6页
Chinese Journal of Applied Ecology
基金
国家林业局行业公益专项(20070414)资助
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
wastewater slow infiltration
tree biomass growth
nutrient content
Na＋ content
leaf length
leaf asymmetry
wastewater stress
