The Photosynthetic Characteristics of Glehnia littoralis in the Northwest of Hebei

doi:10.7668/hbnxb.2011.02.045

Abstract

Abstract: A field experiment was conducted in Alpine area of North China to study the photosynthetic characteristics with Glehnia littoralis,and ECA-PB0402 photosynthesis closed system and pocket PEA were used in the study. The results showed that：Glehnia littoralis Pn showed a two peaks curve.when the soil with adequate moisture and fertilizer on summer sunny days,peak in 10：00 and 16：00.The net photosynthesis rate appear in 10：00,the light saturatio point was 2 070.0 p,moL/(m2·s),The light compensation point was 181.2 ILLmol/(m2·s),AQY decreases Was 0.078 1,the maximum PSII photochemical efficiency(Fv/Fm)of Glehnia littoralis leaf was declined to about 0.51 at 1400 in sunny days.declined about 39%compared to the maximum value.The conclusion is that under tlIe natural sunny conditions Glehnia littoralis showed a photosynthesis rest in midday and occurred some photoinhibition at noon, it is a typical positive plant,adaptability of sunlight,Better light conditions of the land should be selected,to increase the production of Glehnia littoralis.

Key words: Alpine area of North China, Glehnia littoralis, Photosynthetic rate Photosynthetically active radiation, Chlorophyll fluorescence parameter

CLC Number:

S67.01

ZHANG Jing, TANG Ji-jun, WANG Yan, LIU Yu-hua, LI Xu-guang. The Photosynthetic Characteristics of Glehnia littoralis in the Northwest of Hebei[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2011, 26(2): 218-222. doi: 10.7668/hbnxb.2011.02.045.

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