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KMID : 0903519720150010041
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Journal of the Korean Society of Agricultural Chemistry and Biotechnology
1972 Volume.15 No. 1 p.41 ~ p.47
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Analysis of Productivity in Rice Plant
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Abstract
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Comparative study on dynamic change of canopy structure during ripening period were carried out by using newly bred high yield rice cultivar (IR 667-Suwon 213) and a commercial variety, Jinhung in relation to nitrogen nutrition. The results were as follows.
1. Canopy structure pattern (vertical distribution of dry matter density at heading) was vertical type for Jinhung and horizontal type for IR 667.
2. The vertical distribution pattern of leaf area density (or weight) in the canopy was central dominant type for IR 667 while apical dominant type for Jinhung.
3. Canopy conservation pattern and percent distribution pattern of leaf area density followed the vertical distribution pattern of leaf area density.
4. Canopy persistence was weaker in IR 667, thus they have smaller canopy conservation ratio indicating faster senescence.
5. Slow supply of nitrogen (sulfur coated urea) showed a trend to change the apical dominant pattern into the central dominant pattern by the conservation of central portion, and it-resulted in higher yield though nitrogen nutrition did little affect canopy pattern.
6. The central and apical dominant pattern appeared to be well matched to the upper leaf-dependent type and the lower leaf-dependent type of grain yield, respectively.
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