Photosynthetic induction responses of Pinus koraiensis seedlings grown in different light environments  

不同光照条件下红松幼苗光合作用诱导反应的研究(英文)

作　　者：周永斌[1] 殷有[1] 刘兴双[2] 王庆礼[3] 

机构地区：[1]沈阳农业大学,沈阳110161 [2]中国矿业大学,北京100083 [3]中国科学院沈阳应用生态研究所,沈阳110015

出　　处：《Journal of Forestry Research》2004年第3期246-248,共3页林业研究（英文版）

摘　　要：The time processes of photosynthetic induction responses to various irradiances in Korean pine (Pinus koraiensis) seedlings grown in open-light environments and in understory of forest were studied in an area near the Research Station of Changbai Mountain Forest Ecosystems, Jilin Province, China from July 15 to August 5, 1997. The results showed that at 200 靘olm-2s-1 photosynthetic photon flux density (PPFD) and 500 靘olm-2s-1 PPFD, the induction time for the photosynthetic rates of understory-grown seedlings to reach 50% and 90% steady-state net photosynthetic rates was longer than that of the open-grown seedlings. The induction responses of open-growth seedlings at 500 靘olm-2s-1 PPFD were slower than those at 200 靘olm-2s-1 PPFD, but it was the very reverse for understory-growth seedlings, which indicates that the photosynthetic induction times of Korean pine seedlings grown in the understory depended on the sunfleck intensity.无论光通量密度(PPFD)为200靘ol穖-2穝-1还是500靘ol穖-2穝-1,生长在林冠下的红松幼苗光合速率达稳定净光合速率的50%和90%的诱导时间均长于全光条件下生长苗木。全光下生长的红松幼苗在PPFD为500靘ol穖-2穝-1时的诱导反应较PPFD为200靘ol穖-2穝-1时缓慢,而林冠下生长苗木则恰好相反。表明林冠下生长红松幼苗的光合作用诱导期与光斑强度有关。图3参6。

关 键 词：Pinus koraiensis seedlings Photosynthetic induction responses Natural light 

分 类 号：S791.247[农业科学—林木遗传育种] S718.5[农业科学—林学]