天津市畜禽养殖粪便产生量估算及耕地负载初步评估

Estimation of the Animal Feces Amount in Animal Farming and Its Cultivated Land Load in Tianjin

以天津统计年鉴为依据,参考有关文献资料,估算了2011年天津市畜禽养殖粪便产生量和畜禽粪便氮、磷、钾养分资源量,并对耕地负载及环境效应进行了初步评价。结果表明,2011年天津市畜禽粪便产生量为997.32万t;畜禽粪便所含氮、磷、钾养分总量为10.9万t,氮、磷、钾含量分别为5.6万,2.0万,3.3万t;畜禽粪便及其氮、磷纯养分平均耕地负荷分别为25.16 t/hm2,141.13,50.45 kg/hm2。参考欧盟标准,天津全市耕地畜禽粪便、氮养分负荷量没有超标,但磷养分负荷量超标;北辰区、宁河县、蓟县及滨海新区的汉沽4个地区的畜禽粪便量及氮、磷养分耕地平均负荷量均全部超标。天津市畜禽养殖业对环境构成了潜在污染威胁。

Based on Tianjin statistical data and relating literature,this paper calculated animal feces amount and it＇s NPK nutrient resources in Tianjin in 2011.Its environmental effect and its cultivated land load in Tianjin were evaluated.The results showed that the production of animal manure in animal farming was 9.973 2 million tons in Tianjin in 2011.The total NPK nutrient was 109 000 tons in the animal manure,in which the amount of nitrogen,phosphorus,potassium nutrient were 56,20,33 thousand tons respectively.The average load of animal manure and its N,P pure nutrients were 25.16 t/hm2,N 141.13 kg/hm2,P 50.45 kg/hm2.Referring to the EU standards,The average cultivated land load of animal manure and its N were below the limiting line,but the load of P above the limiting line.The average cultivated land load of animal manure and its NP nutrient were above the limiting line in Beichen District,Ninghe County,Ji county,and Hangu of Binhai New District.It suggests that the animal farming in Tianjin had posed a threat of potential environmental pollution.