| Effect of density on canopy structure and photosynthetic characteristics in soybean population |
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| DOI：10.7606/j.issn.1000-7601.2011.04.14 |
| Key Words: soybean canopy structure photosynthetic characteristics yield |
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| Abstract: |
| With Kennong 4 as the experimental material, we analyzed the effect of density on plant type characteristics, leaf area index, dry weight, radiation transmittance rate, intercepting radiation, photosynthetic rate, transpiration rate, stoma conductance, specific weight, and yield of soybean
in the field condition. The results indicated that there were different soybean canopy structures and photosynthetic characteristics. There was significant dif
ference between high density and low density. Plant height, average stem length and average petiole length increased with the increase of density, while node nu
mber, average stem diameter, average petiole diameter and average langle between stem and petiole decreased with the increase of density. Leaf area index, dry weight of different layers and total canopy intercepting radiation increased with the increase of density. Leaf area index concentrated in the upper and middle canopy and dry weight concentrated in the bottom and middle canopy. Photosynthetic rate, transpiration rate, stomatal conductance and specific weight decreased with the increase of density. The yield of 3.6×105-plants-per-hm2 (D3) reached the highest. |
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