河北省不同养殖模式的畜禽粪尿资源及污染风险分析

利用统计数据和实地调研数据,借鉴国内外研究方法,系统地估算了河北省各地区规模化养殖和农户散养模式下的畜禽粪尿资源数量与粪尿农田负荷量。研究结果表明,2004年,河北省的畜禽规模养殖粪尿量比例达到49.6%,基本接近农户散养比例。廊坊和石家庄的规模养殖产生的粪尿比例在河北省位于前列,分别为72%和59%;河北省畜禽养殖对于农田的污染风险主要以规模养殖为主,规模养殖下农田负荷量为114.1t·hm^-2,该模式下单位面积农田氮负荷量为0.56t·hm^-2,磷为0.17t·hm^-2,高于全国平均水平。

The Assessment and Comparison on Animal Manure Pollution Risk of Different Breeding Patterns in Hebei

Based on statistical and inquisitional data,the quantity of animal manure production and its load to cropland in Hebei Province were analyzed in this paper. The resuhs were difference which depended on their feeding operations, both of intensive and household feeding style system were chosen in this case study. It is showed that the ratio of intensive system to total animal manure production accounted by 49.6% in Hebei in 2004 and it almost equaled to the ratio of household animal feeding operation. In all cities of Heibei Province, Langfang and Shijiazhuang were the top two on the ratio of intensive system to total manure production, respectively, arrived at 72% and 59%. In this paper, it also indicated intensive system became the all-important resource for land pollution risk and animal manure production load to cropland. The province-wide mean level of animal manure production load to cropland was 114.1 tons per hectare. Moreover. the manure nitrogen load to cropland was 0.56 ton per hectare, and manure phosphorus load was 0.17 ton per hectare.