欢迎访问林业科学,今天是

林业科学 ›› 2003, Vol. 39 ›› Issue (1): 44-49.doi: 10.11707/j.1001-7488.20030107

• 论文及研究报告 • 上一篇    下一篇

玉兰属5树种生理指标的对比研究

傅大立 李芳东 赵天榜 靳三恒 高俊红   

  1. 中国林业科学研究院经济林研究开发中心,郑州450003;河南农业大学,郑州450002;河南省南召县林业局,南召474650;郑州市二七区农业经济委员会,郑州450000
  • 收稿日期:2001-09-24 修回日期:1900-01-01 出版日期:2003-01-25 发布日期:2003-01-25

COMPARISON ON THE PHYSIOLOGICAL PARAMETERS OF FIVE YULANIA SPECIES

Fu Dali,Li Fangdong,Zhao Tianbang,Jin Sanheng,Gao Junhong   

  1. Non timber Forestry Research and Development Center of CAF Zhengzhou450003;Henan Agricultural University Zhengzhou450002;Nanzhan Forest Bureau,Henan Province Nanzhao474650;Zhengzhou Erqi Agricultural Economic Council Zhengzhou450000
  • Received:2001-09-24 Revised:1900-01-01 Online:2003-01-25 Published:2003-01-25

摘要:

对玉兰属(Yulania) 5树种,即望春玉兰[Y .biondii (Pamp .)D .L.Fu]、紫玉兰[Y.liliiflora (Desr.)D .L .Fu]、玉兰[Y.denudata (Desr.)D .L.Fu]、腋花玉兰[Y .axilliflora (T .B .Zhao et al.)D .L .Fu]和舞钢玉兰[Y .wugangensis (T .B .Zhaoetal.)D .L .Fu]的生理指标作了测定,结果表明,5树种光合曲线较为相似,其光补偿点约10.0 μmol·m-2s-1,饱和光合有效辐射约1 000 μmol·m-2s-1,光呼吸平均为2.1μmol·m-2s-1。5树种光合曲线的差异主要体现在最大光合速率Pmax这一指标上,分别为:望春玉兰8.2 μmol·m-2s-1、紫玉兰8.0 μmol·m-2s-1、玉兰14.4μmol·m-2s-1、腋花玉兰11μmol·m-2s-1、舞钢玉兰15.3μmol·m-2s-1。5树种的CO2 补偿点分别为:望春玉兰127μmol·mol-1、紫玉兰62μmol·mol-1、玉兰52μmol·mol-1、腋花玉兰106μmol·mol-1、舞钢玉兰51μmol·mol-1。叶片水分利用效率分别为:望春玉兰0.14%、紫玉兰0.29%、玉兰0.16%、腋花玉兰0.20%、舞钢玉兰0.24% [molCO2·(molH2O)-1]。望春玉兰是辛夷的主要原植物,其水分利用效率较小、CO2 补偿点高,因此,丰产栽培时,要保证水分供应和林内通风透光,以利叶片的光合作用,提高辛夷产量。

关键词: 玉兰属, 光合作用, 水分利用效率, 最大光合速率, CO2补偿点

Abstract:

The physiological parameters of five species, Yulania biondii (Pamp.) D. L. Fu, Y. liliiflora (Desr.) D. L. Fu,Y. denudata (Desr.) D. L. Fu, Y. axilliflora (T. B. Zhao et al.) D. L. Fu and Y. wugangensis (T. B. Zhao et al.) D. L. Fu were measured. Their light compensation point for photosynthesis was about 10.0 μmol·m-2s-1, the photosynthesis saturated PAR was about 1 000 μmol·m-2s-1, and the mean photo-respiration rate was 2.1 μmol·m-2s-1. The main photosynthetic difference among five species was the light saturated photosynthetic rate (pmax). The value of pmax of 5 species was 8.2 μmol·m-2s-1 for Y. biondii, 8.0 μmol·m-2s-1 for Y. liliiflora, 14.4 μmol·m-2s-1 for Y. denudata, 11 μmol·m-2s-1 for Y. axilliflora and 15.3 μmol·m-2s-1 for Y. wugangensis. The CO2 compensation point for leaf photosynthesis was 127 μmol·mol-1 for Y. biondii, 62 μmol·mol-1 for Y. liliiflora, 52 μmol·mol-1 for Y. denudata, 106 μmol·mol-1 for Y. axilliflora and 51 μmol·mol-1 for Y. wugangensis.WUE (water use efficiency) was also significantly different, and was 0.14% for Y. biondii, 0.29% for Y. liliiflora, 0.16% for Y. denudata, 0.20% for Y. axilliflora and 0.24% for Y. wugangensis. Y. biondii, the most important species for Xinyi medicine in China, its WUE was the lowest and its CO2 compensation point was the highest among all five species, therefore it was important to irrigate the plants in the water limited environment and to maintain a relatively sparse canopy in order to increase the bud yield of Xinyi.

Key words: Yulania, Photosynthesis, Water use efficiency, Maximum photosynthetic rate, CO2 compensation point