Application of development model for analysis of growth and development of rice [Oryza sativa] transplanted in different plant numbers per hill
1994
Yamamoto, Y. (Toyama-ken. Agricultural Research Center (Japan)) | Kawaguchi, S. | Takahashi, W.
To clarify the characteristics of rice growth, number of leaves, number of tillers and stem weight, the developmental stage estimation method (DVI method) using air temperature was applied to rice growth planted under different number of seedlings per hill conditions for the rice variety Koshihikari. The curve line models were well suited for comparison of the DVI values and the number of leaves in the different seedling groups. The number of leaves was higher at hills with a few seedlings than that of hills with many seedlings. In the main stem flag leaf number, there was a 1.5 leaf difference between 1-saddling hills and 8-seedling hills. The three-dimensional cure line models were well suited for comparison of the DVI values and the number of tillers per hill for each seedling groups. The number of tillers was higher in the hills with many seedlings than the hills with few seedling at every developmental stage. Both the estimated emergence stage of the last tiller and the maximum tiller number stage appeared faster in the hills with many seedlings than in the hills with a few seedlings
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