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根际沉积及其在植物-土壤碳循环中的作用

王振宇1,2;吕金印1;李凤民1,2;徐炳成1,2   

  1. 1 西北农林科技大学中国科学院-水利部水土保持研究所黄土高原土壤侵蚀与旱地农业国家重点实验室, 杨凌 712100;2兰州大学生命科学学院干旱与草地生态教育部重点实验室, 兰州 730000
  • 收稿日期:2005-08-16 修回日期:2006-07-27 出版日期:2006-10-18 发布日期:2006-10-18

Rhizodeposition and its role in carbon cycling in plant-soil system

WANG Zhenyu1,2; LV Jinyin1; LI Fengmin1,2; XU Bingcheng1,2   

  1. 1State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil Erosion and Water Conservation of Chinese Academy of Sciences and Water Resources Ministry,Northwest Sci-Tech University of Agriculture and Forestry, Yangling 712100, China;2Key Laboratory of Arid Agroecology of Education Ministy, School of Life Science, Lanzhou University, Lanzhou 730000, China
  • Received:2005-08-16 Revised:2006-07-27 Online:2006-10-18 Published:2006-10-18

摘要: 植物根际沉积是一种重要的植物与土壤交换的界面过程,在土壤碳周转方面具有重要的作用;根际碳的沉积也是联系植物、土壤及微生物的桥梁.本文就近年来关于根际沉积中碳平衡、碳循环等相关研究,阐述了根际碳沉积的机制,探讨了相关试验中存在的问题,以及不同植物品种、种类和生育期根际沉积的差异和根际沉积物与土壤呼吸的关系,指出了根际沉积在植物土壤体系中碳循环的重要作用.在此基础上,提出了未来的研究领域及方向.

关键词: 林带, 疏透度, 数字化测度, 改进方法

Abstract: Rhizodeposition is an important interface process of the exchange between plant and soil, and plays an important role in soil carbon turnover. The rhizodeposition of carbon is also the bridge linking plant, soil, and microorganisms. This paper reviewed the researches on the rhizodeposition in carbon balance and carbon cycling, expounded the mechanisms of carbon rhizodeposition, and discussed the problems in related experiments, the differences of rhizodeposition with plant species, cultivars and growth stages, the relationships between rhizodeposition and soil respiration, and the significance of rhizodeposition in the carbon cycling in plant-soil system. Some related research tasks in the future were also proposed.

Key words: Shelterbelts/windbreaks, Shelterbelt porosity, Digitized measure, Improved method