菜地土壤氮素迁移转化研究进展

发布时间：2018-05-26 01:52

本文选题：菜地 + 土壤　；参考：《中国瓜菜》2017年08期

【摘要】：农业面源污染已成为我国环境污染的重要组成部分,对我国农业生产和生态环境安全带来了较大风险。农田氮素随地表径流流失和地下淋溶是引起日益突出的农业面源污染的主要因素之一。氮素养分是影响蔬菜产量的重要因子,为追求经济效益,菜地氮肥投入量大,过量施肥造成的氮素污染问题日趋严重。笔者综述了菜地氮素迁移转化研究现状,探讨了菜地施肥、地表径流、地下淋溶、氨挥发等菜地土壤氮素迁移和转化途径,分析了土壤中氮素矿化、硝化和反硝化过程,并对今后研究方向进行了展望。
[Abstract]:Agricultural non-point source pollution has become an important part of environmental pollution in China, which brings great risks to agricultural production and ecological environment security. Farmland nitrogen loss with surface runoff and underground leaching is one of the main factors causing agricultural non-point source pollution. Nitrogen nutrient is an important factor affecting vegetable yield. In order to pursue economic benefit, nitrogen fertilizer input is large in vegetable field, and the problem of nitrogen pollution caused by excessive fertilization is becoming more and more serious. In this paper, the present situation of nitrogen transfer and transformation in vegetable fields was reviewed. The approaches of nitrogen transfer and transformation, such as fertilizer application, surface runoff, underground leaching and ammonia volatilization, were discussed, and the processes of nitrogen mineralization, nitrification and denitrification in the soil were analyzed. The future research direction is prospected.
【作者单位】：中国热带农业科学院环境与植物保护研究所;农业部儋州农业环境科学观测实验站;
【基金】：海南省自然科学基金(20164170) 中国热带农业科学院院本级基本科研业务费专项资金(1630042016004) 中央级公益性科研院所基本科研业务费专项(2016hzs1J006)
【分类号】：S158;S63

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