摘要
对环境同位素示踪法的相关农业应用研究的基本原理、一般模式和常用公式进行了概述。其内容包括:13C自然丰度变异δ13C对植物光合作用途径鉴别,植物水分利用效率测定,土壤有机质周转研究和能量饲料利用率评估;δD在植物不同水源的利用率测定中的应用;δ15N在作物固氮量的测定和自然界氮循环研究中的应用。
The fundamentals, general models and mathematical formula of environmental isotopes trace ^(13)C, ~2H and ^(15)N in the agricultural sciences are reviewed. Carbon isotope discrimination is used to indicate photosynthetic pathways in plants, assess water using efficiency of plants, investigate turnover of soil organic matter and evaluate the assimilation of different feeds. Hydrogen isotope discrimination is used to trace water resources for plants and nitrogen isotope discrimination is used to determine nitrogen fixation and study N cycling.
出处
《同位素》
CAS
2004年第3期169-173,共5页
Journal of Isotopes
关键词
环境同位素
示踪
农业应用
environmental isotope
trace
agricultural application
