兴安落叶松光合特性的动态研究

DYNAMIC STUDY OF PHOTOSYNTHETIC CHARACTERISTICS OF LANIX GMELINI

利用LI-6400便携式光合测定系统对兴安落叶松(larix gm elinii)1年生枝上针叶的光合特性进行了研究。结果表明:(1)6月~9月份兴安落叶松针叶的净光合速率的日变化呈单峰曲线。8月2日的日均值最高,为1.23μmolCO2/m2.s,而6月13日的最低为0.20μmolCO2/m2.s。(2)6月~9月份兴安落叶松针叶的蒸腾速率的日变化趋势基本一致,且都呈单峰曲线型。6月~9月份的蒸腾速率的日均值呈上升趋势,9月1日的日均值最大,为1.59μmolH2O/m2.s,6月13日的最低为1.34μmolH2O/m2.s。这将为兴安落叶松光合研究提供一些基础数据。

The photosynthetic characteristics of needle leaf on annual branch of Larix gmelini was studied by LI-6400 photosynthetic system.The results indicate:(1) Diurnal variation of Pn on annual needle leaf of Dahurian larch present the trend of single-peak curve on June～September.The day average Pn was highest on 2th August while lowest on 13th June.(2) Diurnal variation of Tr on annual needle leaf of Dahurian larch also Present the trend of single-peak curve on June～September.The day average Tr present ascending...