Effect of Nitrogen Split Application Methods on Development of Vascular Bundle and Yield Components of Rice Cultivars
2000
Lee Dong-Jin National Institute of Agricultural Science and Technology, RDA, Suwon (Korea Republic) Chae Je-Cheon Dankook University, Cheonan (Korea Republic)
This experiment was conducted to evaluate the effect of split application of nitrogen(N) on development of vascular bundle(VB) and yield components of rice. Two cultivars were used in this study; IR58, an indica type and Shinunbongbyeo, a japonica type. The number and total cross sectional area of the VB in the peduncle and leaf blade were more and bigger in N split application than 100 percent basal fertilizer. Nitrogen split application at necknode differentiation stage increased the number and size of the VB. Nitrogen split application resulted in increased panicle number with application of N before transplanting and at tillering stage; increased spikelets number with N application at necknode differentiation stage; and increased spikelet fertility and 1000 grain weight with N application at necknode differentiation and heading stages.
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