Studies on Photosynthetic Character istics of Juglans hopeiensis Hu in the Field

ACTA HORTICULTURAE SINICA ›› 2005, Vol. 32 ›› Issue (3): 392-396.

• 研究论文 • Previous Articles Next Articles

Studies on Photosynthetic Character istics of Juglans hopeiensis Hu in the Field

Wang Hongxia^1;Zhang Zhihua¹;Wang Wenjiang¹;Gao Yi¹;Sun Hongchuan²

¹Mountainous Areas Research Institute, Hebei Agricultural University, Baoding 071001, China; ² Foresty Bureau of Dingzhou,Dingzhou 073000, China

Received:2004-08-20 Revised:2005-01-31 Online:2005-06-25 Published:2005-06-25

Abstract

Abstract: Photosynthetic characteristics of Juglans hopeiensis Hu ‘Yihe 1’were studied by an open gas analysis system of model CI-301PS in the orchard. The results indicated that the light compensation and light saturation points of Juglans hopeiensis Hu were 50 μmol·m^{- 2} ·s^{- 1} and 1643 μmol·m^{- 2} ·s^{- 1} , respectively. The optimum temperature of Pn was 29 ℃. The curve of diurnal variation of Pn in Juglans hopeiensis Hu showed two peaks with a minimum at noon. Two peaks appeared in the curve of seasonal variation of Pn of Juglans hopeiensis Hu, the first peak occurring in May, and the second peak occurring in August. The diurnal change of Pn in Juglans hopeiensis Hu was influenced by stomatal conductance, PAR (photosynthetic available radiation) , leaf temperature, intercellular CO₂ concentration and transpiration rate. The Pn of Juglans hopeiensis Hu were lower than that of English-walnut, and approached that of Manchurian walnut.

Key words: Walnut, Juglans hopeiensis Hu, Photosynthetic characteristics

CLC Number:

中图分类号: S 663

Wang Hongxia;Zhang Zhihua;Wang Wenjiang;Gao Yi;Sun Hongchuan. Studies on Photosynthetic Character istics of Juglans hopeiensis Hu in the Field[J]. ACTA HORTICULTURAE SINICA, 2005, 32(3): 392-396.

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Studies on Photosynthetic Character istics of Juglans hopeiensis Hu in the Field

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