Title: Evaluation of daily gross canopy photosynthesis in a cotton field with a two-leaf-multilayer model.
Abstract:Experimental studies for photosynthesis were conducted at Yucheng Comprehensive Experimental Station of the Chinese Academy of Sciences from July to August in 2007.In the frame of a two-leaf-multilaye...Experimental studies for photosynthesis were conducted at Yucheng Comprehensive Experimental Station of the Chinese Academy of Sciences from July to August in 2007.In the frame of a two-leaf-multilayer model,daily variation of leaf level net photosynthesis rate in a cotton field was studied by using a LI-6400R portable photosynthesis system during this period.A foliage clumping index(Ω) was used to calculate the sunlit and shaded leaf area index(LAI) after stratification,and the contributions of their photosynthesis to total dry matter formation were calculated separately.Based on these observations,daily gross photosynthesis from leaf to canopy can be estimated.In this experiment,the clumping index was confirmed to be about 0.68,the mean daily gross photosynthesis on August 23(from 09:00 to 18:00 BST) was 20.3 μmol·m-2·s-1;the sunlit leaf’s photosynthesis was about 72% of the total and that of the shaded leaf was about 28%.The photosynthesis in the top layer was about 75% of the total,indicating that the canopy photosynthesis depends mostly on leaves of the top layer.Read More
Publication Year: 2010
Publication Date: 2010-01-01
Language: en
Type: article
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Cited By Count: 1
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