Abstract:

Nitrogen (N) rhizodeposition is an important source of available nutrient for soil microorganisms, and also a crucial connection between plant, soil and microorganism. Recently, along with the in\|depth studies on crop above\|ground parts, increasing attention has been paid to crop below\|ground parts, and N rhizodeposition is becoming one of the most important research fields. This paper briefly presented the latest research progress on N rhizodeposition both at home and abroad, including quantity assessment, influence factors, research and calculate methods, etc. for reference of relative research. Additionally, the paper put forward suggestions as strengening in the future the studies on rhizosphere sediment nitrogen and composition under field in\|situ conditions, getting a better understanding of N rhizodeposition regulatory mechanism, and its synergy and mechanism with carbon rhizodeposition.

Key words: rhizodeposition, nitrogen, 15N, label

摘要：

根际沉积氮是土壤微生物重要的营养元素来源，也是联系作物、土壤和微生物的桥梁。近年来随着对作物地上部分研究的深入，对地下部的研究日益受到重视和关注, 作物根际沉积氮已成为一个重要的研究课题之一。简要介绍了国内外作物根际沉积氮的最新研究进展，包括数量评估、影响因素、研究和计算方法等，以供相关研究参考。并提出未来应加强大田原位情况下根际沉积氮量与组成的研究，明确其调控机制，以及与根际沉积碳之间的协同作用与机制。

关键词: 根际沉积；氮；15N；标记