北京林业大学学报2018，Vol.40Issue(2)：76-81,6.DOI:10.13332/j.1000-1522.20170338
白刺幼苗生物量与氮含量在叶与全株间的尺度转换
Scaling from leaf to whole plant in biomass and nitrogen content of Nitraria tangutorum seedlings
摘要
Abstract
[Objective] The relationship between the evolved strategies of plant species and the material and energy cycles of ecosystems is linked by plant biomass and nutrient allocation, and the pattern of plant resources allocated to its different components is a fundamental aspect of its biological characteristics. In this paper, the scaling from components to whole plant in biomass and nitrogen content of Nitraria tangutorum seedlings was researched in the northeast of Ulan Buh Desert, Inner Mongolia of northern China. [ Method] Firstly, we measured the biomass of root, stem and leaf of Nitraria tangutorum, individually, and we converted them into a value of logarithm (base 10) to get the linear fitting equation of the stem biomass or root biomass taking leaf biomass as variable. Then we measured the nitrogen concentration of each component, also, we linearly fitted the nitrogen concentration of the leaf and the stem or root for further study. [Result] The results showed that the biomass of stem and root could be predicted accurately by giving the leaf biomass ( R2 of root-leaf and stem-leaf regression equations were 0. 9012 and 0. 9264, respectively). And the nitrogen concentration of root and stem also could be predicated well by giving the leaf nitrogen concentration too ( R2 of root-leaf and stem-leaf regression equations was 0. 8501 and 0. 8447, respectively). Then we obtained the prediction model of the whole plant biomass by adding the three parts of plant: Mp = ML + 100. 0209 M0. 8456L + 100. 4369 M0. 8678L , and we inferred the nitrogen content predicting model of whole plant by adding the three parts together similarly: Np = ML NL + 100. 0209 ML0. 8456 (0. 1094NL + 0. 0156 ) + 100. 4369 ML0. 8678 (0. 1088NL +0. 0148). And through the field data verifying, it was showed that the relationship between the biomass and nitrogen content of whole plant could be predicted by the biomass and nitrogen concentration of Nitraria tangutorum leaves: lgN′p = 1. 0752lgM′p - 1. 7684. [ Conclusion] It was showed that the biomass and nitrogen content of the whole plant of Nitraria tangutorum can be predicted by its components.关键词
异速生长/生态化学计量/生物量/氮含量/白刺Key words
allometry/ecological stoichiometry/biomass/nitrogen content/Nitraria tangutorum分类
农业科技引用本文复制引用
邢磊,薛海霞,李清河,高婷婷..白刺幼苗生物量与氮含量在叶与全株间的尺度转换[J].北京林业大学学报,2018,40(2):76-81,6.基金项目
国家自然科学基金项目(31470622). （31470622）
