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笔者根据2016年贺州市畜禽养殖统计数据和各类畜禽粪便日排泄系数,计算畜禽粪便量和耕地畜禽粪便负荷量。结果显示,贺州市畜禽粪便年产生量达461.09万t,耕地畜禽粪便年均负荷量为24.98 t/hm~2,其中,富川县,八步区,平桂区3个县(区)的畜禽粪便污染负荷量已高达50.89 t/hm~2、47.84 t/hm~2和33.41 t/hm~2,超出了耕地承载畜禽粪便适宜范围的上限,具有较高的潜在环境污染风险。笔者还分析了畜禽粪便污染环境的主要原因,并提出了防治对策。
According to the statistical data of livestock breeding in Hezhou City in 2016 and the daily excretion coefficient of livestock excrement, the author calculates the amount of livestock manure and the manure load of cultivated land. The results showed that the annual output of livestock and poultry in Hezhou was 4.61.09 million tons and the average annual load of livestock and poultry manure was 24.98 t / hm ~ 2. Among them, three counties (districts) in Fuchuan County, Ba Bu District and Pinggu District, Of the livestock manure pollution load has reached as high as 50.89 t / hm ~ 2,47.84 t / hm ~ 2 and 33.41 t / hm ~ 2, which is beyond the upper limit of suitable range of livestock manure excrement cultivated land, with a high potential risk of environmental pollution . The author also analyzed the main reason that livestock and poultry excrement pollute the environment and put forward the prevention and cure countermeasure.