Key Laboratory of Ecological Forestry Engineering, Institute of Ecology and Forestry, Sichuan Agricultural University, Chengdu 611130, China.
Sci Rep. 2017 Jan 30;7:41680. doi: 10.1038/srep41680.
Forest filtering is a well-known and efficient method for diminishing atmospheric pollutant (such as SO and Cl) inputs to soil and water; however, the filtering efficiencies of forests vary depending on the regional vegetation and climate. The rainy area of West China has suffered from heavy rainfall and human activity, which has potentially resulted in large amounts of sulfur and chlorine deposition, but little information is available regarding the filtering effects of typical plantations. Therefore, the migration of SO and Cl from rainfall to throughfall, stemflow and runoff were investigated in a camphor (Cinnamomum camphora) plantation, a cryptomeria (Cryptomeria fortunei) plantation and a mixed plantation in a 9-month forest hydrology experiment. The results indicated the following: (i) The total SO and Cl deposition was 43.05 kg ha and 5.25 kg ha, respectively. (ii) The cover layer had the highest interception rate (60.08%), followed by the soil layer (16.02%) and canopy layer (12.85%). (iii) The mixed plantation resulted in the highest SO (37.23%) and Cl (51.91%) interception rates at the forest ecosystem scale, and the interception rate increased with increasing rainfall. These results indicate that mixed plantations can effectively filter SO and Cl in this area and in similar areas.
森林过滤是一种减少大气污染物（如 SO 和 Cl）输入土壤和水体的有效方法；然而，森林的过滤效率因区域植被和气候而异。中国西部多雨地区遭受了暴雨和人类活动的影响，可能导致大量的硫和氯沉积，但对于典型种植园的过滤效果却知之甚少。因此，在 9 个月的森林水文学实验中，研究了香樟（Cinnamomum camphora）种植园、柳杉（Cryptomeria fortunei）种植园和混交林种植园中的降雨、穿透雨、茎流和径流中的 SO 和 Cl 迁移。结果表明：（i）总 SO 和 Cl 沉积分别为 43.05kg ha 和 5.25kg ha。（ii）覆盖层截留率最高（60.08%），其次是土壤层（16.02%）和树冠层（12.85%）。（iii）在森林生态系统尺度上，混交林种植园导致 SO（37.23%）和 Cl（51.91%）的截留率最高，截留率随降雨量的增加而增加。这些结果表明，在该地区和类似地区，混交林种植园可以有效地过滤 SO 和 Cl。
