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Citation:

The Influence of Environment Factors on Photosynthetic and Transpiration Rate of Amorpha fruticosa in Maowusu Sandland

  • Received Date: 2005-04-07
  • The Li-6400 portable photosynthesis system was used for the dynamic research of photosynthesis and transpiration of Amorpha fruticosa in Maowusu sandland,and the environmental factors were recorded at the same time.This paper analyzed the diurnal change of photosynthesis and transpiration of Amorpha fruticosa and the effect of environmental factors.The results indicated that the photosynthetic rate displayed two-peak pattern in June and July and the peaks were at 8:00 and 18:00,and it displayed one-peak pattern in August and September and the peak was at 12:00.The transpiration rate displayed two-peak pattern in June and July and the peaks were at 10:00 and 18:00 in June and at 10:00 and 16:00 in July,and it displayed one-peak pattern in August and September and the peak was at 12:00.The highest photosynthetic and transpiration rates were in August and they are 15.48 μmol·m -2·s –1and 5.87 mmol·m-2·s–1.Under the favorable conditions of soil moisture and light,the photosynthetic and transpiration rates were affected by air humidity obviously.In different months,the water use efficiency of Amorpha fruticosa was fluctuated,and this indicated that photosynthesis and transpiration were affected by environmental factors.
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The Influence of Environment Factors on Photosynthetic and Transpiration Rate of Amorpha fruticosa in Maowusu Sandland

  • 1. Beijing Forestry University, Beijing100083, China
  • 2.  Research Institute of Forestry, CAF
  • 3.  Key Laboratory of Tree Breeding and Cultivation, State Forestry Administration, Beijing 100091, China
  • 4. Forest Bureau of Lvliang, Lvliang 033400, Shanxi, China

Abstract: The Li-6400 portable photosynthesis system was used for the dynamic research of photosynthesis and transpiration of Amorpha fruticosa in Maowusu sandland,and the environmental factors were recorded at the same time.This paper analyzed the diurnal change of photosynthesis and transpiration of Amorpha fruticosa and the effect of environmental factors.The results indicated that the photosynthetic rate displayed two-peak pattern in June and July and the peaks were at 8:00 and 18:00,and it displayed one-peak pattern in August and September and the peak was at 12:00.The transpiration rate displayed two-peak pattern in June and July and the peaks were at 10:00 and 18:00 in June and at 10:00 and 16:00 in July,and it displayed one-peak pattern in August and September and the peak was at 12:00.The highest photosynthetic and transpiration rates were in August and they are 15.48 μmol·m -2·s –1and 5.87 mmol·m-2·s–1.Under the favorable conditions of soil moisture and light,the photosynthetic and transpiration rates were affected by air humidity obviously.In different months,the water use efficiency of Amorpha fruticosa was fluctuated,and this indicated that photosynthesis and transpiration were affected by environmental factors.

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