摘要
为了缓解菜田地表灌溉水污染物含量较高,达不到农田灌溉水质标准的问题。检测了未经处理的地表水和一次处理、重复处理的净化水的各项污染物含量,并以一次处理的净化水进行生菜漂浮育苗试验,分析比较净化水的生物学效应。结果表明:未经处理的地表灌溉水悬浮物含量达78mg/L,超过污染警戒指标,BOD5、COD、粪大肠菌落数3项未达到清洁水质指标,分别为11.5mg/L、42mg/L和700个/100mL;经一次处理和重复处理的净化水的大部分污染物含量均不同程度下降,其中悬浮物含量分别降低为13mg/L和10mg/L,均已符合农田灌溉水质指标,BOD5、COD、粪大肠菌落数均达到清洁水质指标。一次处理的净化水与自来水进行生菜漂浮育苗比较试验时,其幼苗生长和营养积累无异常;幼苗移至大田比较试验时,其鲜菜产量和干物产量无差异,一次处理的净化水可以用于菜田灌溉。试验表明,地表灌溉水净化处理能改善农田灌溉水质,降低灌溉水中污染物含量,在生产应用中效果良好。
The pollutants in raw sewage, once-treated and double-treated ground water were tested and biological effects on floating lettuce were analyzed to alleviate pollution issue of surface water in vegetable garden, which resulted in irrigation water under proof. The results showed that the content of suspended solids in raw sewage was 78 rag/L, exceeding the warning level, BODs, COD three fecal coliforms were 11.5 rag/L, 42 mg/L and 700/100 mL, respectively, failing to meet the clean water standard. Most of pollutants were reduced to some extent after once or double treated. The suspended solid amount was decreased to 13 mg/L and 10 rag/L, respectively, qualified for agronomical irrigation. BODs and COD, fecal coliforms were up to scratch. Once-treated water and tap water were used in lettuce floating transplant system to test its biological effects on vegetable growth. Results demonstrated that compared with tap water treatment, no biological abnormal phenomenon on development and yield was observed, indicating once-treated water could be used in vegetable irrigation.
出处
《中国农学通报》
CSCD
2012年第17期277-283,共7页
Chinese Agricultural Science Bulletin
基金
广东省省科学技术厅农业重点攻关项目"珠三角蔬菜水肥一体化高效栽培技术集成与示范"(2009B020202003)
广东省科学技术厅农业攻关项目"生态节约型蔬菜高效栽培技术集成研究"(2009B020304002)
广东省广州市番禺区农业攻关项目"蔬菜灌溉水净化处理和反季节蔬菜集约化育苗技术"(2010-Z-82-1)
广东省现代农业产业体系建设(粤农2009-380)
关键词
菜田
灌溉水
污染物
净化处理
vegetable garden
irrigation water
pollutants
purification
