摘要
氮同位素组成作为一个有效的示踪氮素循环的指标在生理学、生态学等领域的氮素研究中得到广泛应用。对比不同的研究我们发现,其样品的前处理方法不尽相同,可能会影响结果之间的有效对比。通过对比不同前处理方法对样品氮同位素组成和氮含量的影响,结果表明:样品用105℃杀青然后40℃烘干和直接用40℃烘干,氮同位素组成没有显著差异;氮含量的测定也表明,不同的处理方法没有对氮含量造成显著的差异。因此认为杀青或者不杀青不会对植物样品的氮同位素组成和氮含量测试造成显著的影响。
δ^15N can be used to trace the nitrogen cycle in ecosystems, and thus are potential tools to investigate the nitrogen cycles in context of plant physiology and ecology. Recent studies have shown that the variation of pretreatment method may affect sample δ^15N. In this study, we investigated the effects of different pretreatment method on sample δ^15N and nitrogen content. The results show that no difference was found for sample δ^15N and nitrogen content by pretreatment of high temperature desiccation under 105℃ and then drying under 40℃ or drying under 40℃ only. The results imply that no effect was found for sample pretreatment on sample δ^15N and nitrogen content.
出处
《水土保持研究》
CSCD
北大核心
2008年第6期250-251,共2页
Research of Soil and Water Conservation
基金
国家自然科学基金项目(40673012,40523002和40121303)
中国科学院方向性项目(KZCX3-SW-139)
黄土与第四纪地质国家重点实验室开放基金资助项目(SKLLQG0613)资助
关键词
氮同位素组成
氮含量
杀青
δ^15N nitrogen content, high temperature desiccation
