生态与农村环境学报2017，Vol.33Issue(6)：546-554,9.DOI:10.11934/j.issn.1673-4831.2017.06.009
茭鸭共作人工湿地消纳养殖池塘富营养化水的初步研究
Nutrient Assimilating Effects of Zizania latifolia-Duck Symbiotic Artificial Wetland on Eutrophied Water From Fishing Ponds
摘要
Abstract
A field experiment consisting of four treatments: Treatment DF0(artificial wetland with monoculture of wild rice stem or Zizania latifolia without fertilization), Treatment DFC(artificial wetland with monoculture of wild rice stem with conventional fertilization), Treatment GFC(artificial wetland with wild rice stem-duck symbiosis and conventional fertilization), and Treatment GF50%C(artificial wetland with wild rice stem-duck symbiosis and 50% of the conventional fertilization), was laid out and carried out at the Aquatic Vegetable Production Base in Xiaoji Town of Yangzhou, Jiangsu Province.The water used in the experiment was diverted from fish ponds near the test area.Dynamics of total nitrogen and total phosphorus in the surface water and organic matter and available nutrients in the soil of the treatments were analyzed.Results show that in Treatment DF0, seven days after the eutrophied water was diverted from the fish ponds, the concentration of total nitrogen and total phosphorus fell to 2127% and 1558% of the peak value, respectively.For treatments with normal fertilizeration (DFC), seven days after fertilization the concentration of total nitrogen and total phosphorus in surface water fell down to 821% and 651% of their peak value, respectively.In Treatment GF50%C, about 8281% and 8425%, respectively, of the N and P in the eutrophic water was removed, and there was no significant difference found between Treatment GF50%C and Treatment DFC in N and P removal rate.Compared with Treatment DFC, Treatment GF50%C not only maintained the yield of wild rice stem and the economic benefits of the system at the same level, but also improved the contents of soil organic matter and available nutrients.In Treatment GFC and Treatment GF50%C about 4 500 m3·hm-2 of eutrophied water from the fish ponds were used to sustain growth of wild rice stem, containing N and P, equal to 8355 kg urea and 4650 kg superphosphate.Consequently, Treatment GF50%C can not only purify the eutrophied water effectively by removing N and P through harvesting of the crop, but also improve soil quality and economic benefits.关键词
茭鸭共作/人工湿地/富营养化水/土壤养分/经济效益Key words
Zizania latifolia-duck symbiotic farming/artificial wetland/eutrophied water/soil nutrient/economic benefit分类
资源环境引用本文复制引用
张家宏,王桂良,徐荣,寇祥明,韩光明,王守红,朱凌宇,毕建花,金银根..茭鸭共作人工湿地消纳养殖池塘富营养化水的初步研究[J].生态与农村环境学报,2017,33(6):546-554,9.基金项目
江苏省水产三新工程项目(Y2013-28) （Y2013-28）
江苏省科技支撑计划(BE2014360) （BE2014360）
中央财政支农项目〔TG(15)110〕 （15）
