10个品系杂交杨叶片能量转化值和固碳估算

Estimation of energy transformation value and CO_2 assimilation in 10 crossbreed poplars

本实验研究了我国重点杨树培育区10个不同品系生长季内光能转化与固碳量.10个品系杂交杨叶片全日照条件下,单个叶片在全日照条件下在生长季转换光合有效辐射的比例为16.3%～24.9%,用于碳固定的比例为9.77%～14.9%.叶片中产生的总电子流大的,用于碳固定电子流也大;叶片中电子流随月份的推移不断降低.单个叶片在全光照下的光合有效辐射的转化不能代表整株树木对光合有效辐射的转化.整株杂交杨的固碳和能量转化的估算需不同时段太阳天顶角下有效辐射强度和受光叶面积总和等相关测量数据的进一步分析.

The research was provided a scientific basis for China carbon abatement and carbon trading. The results showed that the light energy transformation and the largest carbon fixation in July are larger than in other month during growing season, in which used the ratio of 9.77%-14.9% to carbon fixation. The more the electron flow the leaf produced, the more the apparent quantum yield of carbon fixation used. The electron flow produced of leaves continuously decreased over the month. The solar energy transformation of a single leaf in full light of can not represent that of the whole plant tree on the same condition. The energy transformation estimates and carbon fixed assimilation of the overall of poplar required the further analysis of relevant measurement data.