松嫩草原碱化草甸朝鲜碱茅光合生理生态特性的研究  

Characteristic on physiological ecology of photosynthesis of Puccinellia chinampoensis in alkalized meadow in Songnen Plains of China

作　　者：郭晓云[1] 周婵[1] 杨允菲[1] 李建东[1] 包国章[1] 

机构地区：[1]东北师范大学草地研究所,植被生态科学教育部重点实验室,吉林长春130024

出　　处：《东北师大学报（自然科学版）》2005年第3期73-76,共4页Journal of Northeast Normal University(Natural Science Edition)

基　　金：国家自然科学基金资助项目(30270260;30470272)

摘　　要：在松嫩平原碱化草甸生长季中期,朝鲜碱茅不同龄级叶片净光合速率的日变化均为双峰曲线,第一个峰值出现在12:00左右,第二峰值出现在17:00左右;各龄级叶片中以4 a叶片的净光合速率最高,5 a叶片次之,3 a叶片最低.朝鲜碱茅为C3植物,光补偿点为56μmol/(m2.s),光饱和点为1 800μmol/(m2.s),光半饱和点为600μmol/(m2.s),光近饱和点为1 500μmol/(m2.s).The Puccinellia chinampoensis is a tolerant saline grass in alkalized meadow in Songnen Plains of China. In the middle of growing season, the curves of the diurnal changes of net photosynthesis rates showed two peaks. The first peak appeared at 12：00 and the second was found at 17：00. The net photosyn- thesis rates were the highest in the four age leaf, were lower in the five age and were the lowest in the three age. P. chinampoensis belonged to C3 grass. Its light compensation point was 56 μmol/（m^2·s）, the light saturation point was 1 800 μmol/（m^2·s）, the half light saturation point was 600 μmol/（m^2·s） and the near light saturation point was 1 500 μmol/（m^2·s）.

关 键 词：朝鲜碱茅 叶龄 光合作用 光补偿点 光饱和点 

分 类 号：Q945.79[生物学—植物学]