...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Nutrient Cycling in Agroecosystems >Town-based spatial heterogeneity of nutrient balance and potential pollution risk of land application of animal manure and fertilizer in Shanghai, China.
【24h】

Town-based spatial heterogeneity of nutrient balance and potential pollution risk of land application of animal manure and fertilizer in Shanghai, China.

机译：中国上海市城镇养分平衡的空间异质性及动植物肥料施用的潜在污染风险

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Land application of animal manure has been proven to be an efficient and convenient approach for animal manure treatment and resource recycling that has been encouraged in Shanghai suburbs in recent years. Based on livestock and poultry inventories, the available cropland base, and the application amounts of chemical fertilizer in each town of Shanghai, the nutrient supplies from animal manure, nutrient demands of croplands, and the nutrient inputs from chemical fertilizer were calculated. The nutrient balance and potential pollution risk of land application of animal manure and chemical fertilizer were evaluated by a calculated nutrient balance index (NBI) and nutrient pollution index (NPI). The results show that the annual total nitrogen (TN) demand of croplands was about 46,833 tons while the annual total phosphorus (TP) demand was around 11,373 tons. The annual TN supply from animal manure was 23,341 tons while the annual TP supply was 9,581 tons. The annual TN input from chemical fertilizer was 112,550 tons while the TP input was 14,782 tons. For land application of animal manure, more than 10% of all the towns had a NBI1 for TP. For land application of chemical fertilizer, more than 80% of all the towns had a NBI1 for TP. For the pollution risk of land application of animal manure and chemical fertilizer, there were more than 90% of all the towns with NPI1 for TP. For the entire city, the local croplands could agronomically use all the animal manure if it were properly distributed and applied reducing the need for large quantities of chemical fertilizer application.
机译：事实证明，土地施用动物粪便是一种有效，便捷的动物粪便处理和资源回收利用方法，近年来在上海郊区受到鼓励。根据上海各镇的畜禽存量，可利用的农田基础和化肥的施用量，计算出动物粪便的养分供给，农田的养分需求以及化肥的养分投入。通过计算出的养分平衡指数（ NBI ）和养分污染指数（ NPI ）评估了动物粪肥和化肥在土地上的养分平衡和潜在的污染风险。结果表明，农田的年度总氮（TN）需求约为46833吨，而年度总磷（TP）需求约为11373吨。每年来自动物粪便的总氮供应为23,341吨，而每年总磷供应为9,581吨。化肥的年总氮输入量为112,550吨，总氮的总输入量为14,782吨。对于动物粪便的土地施用，所有城镇中有超过10％的TN有 NBI i 1表示TP。对于整个城市，如果合理分配和应用本地农田，则可以在农业上使用所有动物肥料，从而减少了对大量化学肥料的需求。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号