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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.
The experiment was carried out on the poplar plantation forest of Zhonglin 2001 with different hydraulic load (0, 3, 6, 9, 12 and 15 cm per week) .The results showed that: Zhonglin 2001 ’The average contents of soil organic matter, total nitrogen, total phosphorus, total potassium and Na + in poplar plantations increased by 1.940, 0.115, 0.029, 1.454 and 0.030 g.kg-1, respectively, The mean total growth of poplar increased by 17.583 t.hm-2.a-1 at loading (3 ~ 12 cm), and the average nitrogen, phosphorus and Na + contents increased by 3.086, 0.645 and 0.121 g.kg- The average total growth of poplar and the average nitrogen, phosphorus and Na + contents of all organs reached the maximum (36.252.thm-2.a-1, 13.162 g.kg-1, and 1.157 g .kg-1, 0.361 g.kg-1), and the load continued to increase but decreased. The content of potassium in various organs of poplar decreased with the increase of hydraulic load. Sewage treatment increased the leaf length of poplar and leaf asymmetry When the hydraulic load> 12 cm per week, the higher Na + and soil moisture in the soil would endanger the growth of poplar trees, which is suitable for the growth of poplar plantation in Zhonglin 2001 Load force week 3 ~ 12 cm.