| 杨旭,黄艳艳,刘海林,茶正早,罗微,林清火.海南省畜禽养殖环境承载力及有机肥替代化肥潜力分析[J].农业环境科学学报,2019,38(11):2609-2618. |
| 海南省畜禽养殖环境承载力及有机肥替代化肥潜力分析 |
| Potential for the environmental carrying capacity of livestock and poultry breeding to substitute organic fertilizers in Hainan Province, China |
| 投稿时间：2019-06-13 |
| DOI：10.11654/jaes.2019-0669 |
| 中文关键词: 畜禽粪便 养分 农用地 承载力 替代化肥潜力 |
| 英文关键词: livestock manure nutrients agricultural land carrying capacity alternative fertilizer potential |
| 基金项目:海南省重大科技计划项目（ZDKJ2017002）；海南省农业环境污染治理项目（NWZL2017001）；中国热带农业科学院基本科研业务费专项资金（1630022018012，1630022017007） |
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| 中文摘要: |
| 为评价海南省各地区农用地环境污染风险程度，分析海南省有机养分替代化肥潜力，基于海南省2017年养殖数据，采用排泄系数法和农作物籽粒比，计算海南省畜禽粪尿和秸秆中氮磷钾养分总量；分析海南省各市县畜禽养殖承载力和环境污染风险系数，计算不同还田比例有机养分替代化肥潜力。结果表明：海南省2017年畜禽粪尿总量为1 110.9万t。畜禽粪便全部还田时，海南省养殖承载力为6 751.5万头猪当量。定安县和海口市农用地污染风险较大，分别为0.98和0.81；海南省秸秆和畜禽粪便氮磷钾养分总量为14.5万t，当还田比例分别为1/3、2/3和100%，有机肥替代潜力分别为4.2%、7.1%和14.1%。研究表明，海南省大部分地区暂无污染风险，且具有较大养殖空间和替代化肥潜力。 |
| 英文摘要: |
| The objectives of the study are to evaluate the risks of fertilizers on agricultural lands, the potential of the environmental carrying capacity of livestock and poultry breeding, and the possible replacements for fertilizers in Hainan Province. Based on the 2017 breeding data measured in Hainan, the excretion coefficient method and crop grain ratio were used to calculate the total amounts of nitrogen, phosphorus, and potassium in livestock manure and straw. We analyzed the environmental carrying capacity, environmental pollution of livestock and poultry, and potential for organic fertilizers to replace chemical fertilizers with different returning proportions in Hainan. Results showed that in 2017 the total amount of livestock and poultry excrement in Hainan was 11.109 million tons. When the livestock manure was returned to agricultural fields, the aquaculture carrying capacity in the province was the equivalent of 675.15 million pigs. The pollution risks of the agricultural lands in Ding'an County and Haikou were relatively high at 0.98 and 0.81, respectively. The total nutrient content (nitrogen, phosphorus, and potassium) in the straw and livestock manure in Hainan was 145 000 tons. When the proportions of nutrients returning to fields were1/3,2/3,and 100%, respectively, the replacement potentials of the organic fertilizers were 4.2%, 7.1%, and 14.1%. The results have shown that currently there are no environmental pollution risks from livestock and poultry breeding in most areas in Hainan. In addition, there is a large breeding space and the potential for fertilizer replacement. |
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