摘要
同位素稀释分析是研究氮素在土壤植物体系中转化和迁移特征的有效方法。本文对国内外近十年利用同位素稀释技术研究土壤微生物和植物对不同形态的氮素的利用与竞争进行了总结,强调了土壤在植物和微生物养分利用中的双重作用。利用同位素稀释分析还可以研究所施氮肥的转化、迁移、和流失,推断土壤-植物系统N肥平衡状况,对提高肥料利用率,科学施肥,减少氮素污染有着科学的指导作用。
Isotope dilution analysis is a valid approach for studying nitrogen transformation characteristics m son -plant systems. The review was concerned about the utilization of different forms of nitrogen by plants and soil microorganisms and the competition between them. Soil functions as both sink and an effective nitrogen capacitor to plants and soil microorganisms and the time pattern of nitrogen utilization were stressed. Also,^15N isotope technique has been applied to trace the fate of nitrogen fertilizer in order to manipulate the utilization by plant and the retention in soil.
出处
《土壤通报》
CAS
CSCD
北大核心
2006年第3期576-581,共6页
Chinese Journal of Soil Science
基金
国家自然科学基金面上项目(40501068)
中国科学院知识创新工程重要方向项目(KZCX3-SW-433)资助
关键词
同位素
氮
土壤
植物
微生物
Isotope
Nitrogen
Soil
Plant
Microorganism
