摘要
为了探究西安市畜禽粪便污染现状,对各区县的农田耕地和水质进行环境质量评价。在确定畜禽粪便年排放量的估算方法和畜禽粪便排泄系数的基础上,估算了2012年西安市畜禽粪便年产生量和主要污染物产生量。在了解各农业非点源污染成因的基础上,针对不同的污染源,提出了一些初步的控制对策和措施。结果表明,2012年西安市畜禽粪便总排放量约为498.41万t,其中牛和猪的排放量较高,分别占总量的46%和37%。畜禽粪便污染物COD、TP和TN产生量分别为12.52万t、8950 t和2.8万t。西安市部分区县的农田耕地负荷警报值分别达到Ⅱ级和Ⅳ级,已不同程度的超过了当地农田耕地的消纳能力,对环境构成污染威胁。畜禽粪便污染物入河情况十分严重,各污染源中,牛尿的污染率指数高达33.5%;各污染物中总氮和总磷的污染率指数分别为52%和41.5%。部分地区的畜禽养殖已经对西安市环境构成污染。
The article was aimed to explore the current livestock and poultry waste pollution and to evalu- ate its impact on the farmland and water quality in different districts and counties in Xi＇an. Based on the estima- tion method of the amount of livestock manure emissions and animal fecal excretion coefficients, we estimated the amount of the annual livestock manure and main pollutants in Xi＇an in 2012. Based on the pollution causes of various agricultural non-point sources, we developed some preliminary control strategies and measures for different pollution sources. The result showed as follows： the total emission of livestock and poultry was about 4.9841 million tons, and the emissions of cattle and pigs relatively high, which accounted for 46% and 37% of the total in Xi＇an in 2012. The COD, TN and TP were 125200 t, 8950 t, and 28000 t, respectively. The load alarm value of farmland reached grade Ⅳ and Ⅱ. It has been beyond the absorptive capacity of the local farmland and caused a serious threat to the environment. The pollution of livestock and poultry manure was very serious, and the pollution rate of cow urine was 33.5%. The pollution rates of total nitrogen and total phosphorus were 52% and 41.5%, respectively. Livestock and poultry in some areas in Xi＇an have already re- sulted in the pollution to the environment.
出处
《安徽农业大学学报》
CAS
CSCD
北大核心
2016年第1期134-139,共6页
Journal of Anhui Agricultural University
关键词
畜禽养殖
农田耕地
水质
预警
承载力
livestock and poultry industry
farmland
water quality
precaution
carrying capacity
