重庆市畜禽粪便排放时空分布研究

以重庆市直辖前(1995、1996年)和直辖后(2000、2001年)畜禽养殖数据为基准,研究重庆市各区(市、县)畜禽的年粪便排放量,并从时间和空间上分析重庆市畜禽粪便年排放量的变化趋势。结果表明,1995、1996、2000、2001年畜禽粪尿总排放量为7455.03万t、7831.56万t、7223.84万t、7421.52万t;猪粪当量分别为6954.84万t、7419.62万t、6433.5万t、6748.02万t;畜禽粪便中平均年有机质排放量为794.45万t、N43.27万t、P23.36万t、K45.51万t。重庆市畜禽粪便负荷、猪粪当量负荷和有机质、N、P、K负荷分布以近郊为重,而畜禽粪便年排放量、猪粪当量及有机质、N、P、K量却是位于三峡库区的区、县量较大;直辖前后畜禽粪便年排放量及猪粪当量、猪粪当量负荷、N、P、K排放总量及负荷相差不明显。

Temporal and spatial distribution of poultry excrements in every district and county of Chongqing

Poultry excrements are generally considered as the main non-point pollution source in the country.Hence,the annual amount of excretion has increasingly attracted people's attention.Based on the statistic information in the years 1995,1996 and 2000,2001 of every district and county of Chongqing,the paper estimated the amount of poultry excrements,analyzed and compared the distribution characteristics and changing tendency of excreta amount of poultry per year.It can be known from the analyzing results that in 1995,1996,2000 and 2001,the excreta amount of poultry urine is 74.5503 million tons,78.3156 million tons,72.2384 million tons,and 74.2152 million tons,respectively.The weight of equated pig excrements,in the four years above mentioned,are 69.5484 million tons,74.1962 million tons,64.335 million tons,,67.4802 million tons,respectively.The average contents of organic matter,N,P and K of the poultry excrements per year are 7.9445 million tons,0.4327 million tons,0.2336 million tons,and 0.4551 million tons,respectively.The equated pig excrement load and the amount of organic matter,N,P and K are greater in the outskirts,and the amount of poultry excrements,organic matter,N,P and K in it is greater in the Three-Gorge area.No distinct differences of the aspects above between before and after 1997.