闽南地区生态治污森林植物初步调查筛选

将森林植物耐污能力划分出4个等级,并依此对闽南地区8个排污1~11 a的养猪场蓄污池、排污沟周边植被进行调查,初步筛选出Ⅰ级耐污植物10种,其中木本1种;Ⅱ级耐污植物有29种,其中木本18种;Ⅲ级耐污植物15种,其中木本5种;Ⅳ级耐污植物1种,其中木本1种.调查结果为闽南地区利用森林生态系统治理养殖污水、试行林畜复合经营提供了参考.本文还简述了森林生态系统具有根系庞大、生长量高、生长周期长、结构复杂、能自行演替、可以更多更长时间更稳定吸收养猪污染物的特点,提出在选择生态治污树种时应首选速生树种、常绿树种、阔叶树种的观点.

Primary Investigation of Forest Plants for Ecological Sewage Treatment in Southern Fujian

In order to screen out the plant species can tolerate wastewater, vegetation in and around cesspits that have stored wastewater for periods ranging from 1 to 11 years was investigated in southern Fujian. Vegetation was assessed for its ability to tolerate wastewater on a 4 point scale. This assessment identified:10 first-grade species (containing 1 woody plant species); 29 second-grade species (containing 18 woody plant species); 15 third-grade species (containing 5 woody plant species); and, just 1 fourth-grade species which itself was a woody plant species. This research can provide guidance for disposing of sewage waters using forestry ecosystems and realizing multiple-use management of forests in southern Fujian. Compared with crop or hydrophyte ecosystems, forests have markedly greater root systems, biomass and life cycles whilst also having potential to be self-perpetuating. On account of these characteristics, forest ecosystems can absorb/treat more wastewater and over longer time periods, suggesting that fast-growing, evergreen, broadleaf species could be the best choice for uptake and utilization of wastewater.