不同水肥条件下农业非点源田间产污强度

为揭示灌水量和施肥量对田间产污强度的影响程度，基于已有的农业非点源污染田间产污模型和该项研究监测试验资料，计算分析了不同灌水量、施肥量和施肥方案下水稻田的田间产污强度。结果表明，灌水量与田间产污强度呈指数增长关系，施肥量与田间产污强度呈正相关；其次，即使在施肥量相同的情况下，不同的施肥方案田间产污强度也有较大差别。综合对比其他相关研究成果以及中国现阶段农田灌溉、施肥现状，讨论分析了田间水肥过程对农业非点源污染的影响。最终研究提出，田间水肥过程对农业非点源污染产出具有较大影响，应将开展节水灌溉与科学施肥、合理调整田间水肥过程等作为当前减轻和缓解农业非点源污染的一项重要措施。

Agricultural non-point source pollution load intensity of the paddy field in different water and fertilization conditions

In order to reveal the influence of water and fertilization on load intensity of agricultural non-point source pollution in field, based on the estimation model of agricultural non-point source pollution in the field and experimental data, the load intensity of agricultural non-point source pollution in different water and fertilization in paddy field was calculated. The results showed that there was a positive exponential correlation between the irrigation amount and load intensity, and there was a positive correlation between the fertilization and load intensity. Secondly, the load intensity had obvious difference in different fertilization modes even with same fertilization level. Compared with other related research results and the present irrigation and fertilization condition in China, the agricultural non-point source pollution effects of the different irrigation and fertilization process in field were discussed. It was concluded that the irrigation and fertilization process in field had obvious influence on agricultural non-point source pollution, so taking the control measures to reduce the pollution was important, such as saving irrigation, scientific fertilization and reasonable adjust process of irrigation and fertilization in field etc.