Growth and Yield of Pot Seedling Rice as Affected by Different Transplanting Times in Double Cropping
2013
Kim, Y.D., RDA, Iksan, Republic of Korea | Kang, S.K., RDA, Iksan, Republic of Korea | Ku, B.I., RDA, Iksan, Republic of Korea | Choi, M.K., RDA, Iksan, Republic of Korea | Park, H.K., RDA, Iksan, Republic of Korea | Sang, W.K., RDA, Iksan, Republic of Korea | Lee, M.H., RDA, Iksan, Republic of Korea | Kim, B.K., RDA, Iksan, Republic of Korea
The healthy rice seedling (Oriza sativa L.) for optimal yield in rice-winter cereals double cropping system is required to enhance the agronomic and economic sustainability of crop production in the southern plain area of Korea. Performance of the pot seedling and conventional tray seedling(control) methods using Chinnongbyeo was compared at two transplanting times of June 10 and June 25 in 2011 following forage barley and wheat cultivation, respectively. Culm diameter, plant height, and productive tillering ratio were higher in pot seedling in both transplanting times than those of the conventional tray seedling. However, leaf area index(LAI), perfect grain ratio, and protein content in milled rice were different by transplanting time. Milled rice yields of pot seedling were 544 kg/10a in June 10 and 513 kg/10a in June 25, respectively, which were 4% higher than the tray seedling. In both transplanting time, panicle number and ripened grain ratio were correlated with milled rice yield in conventional tray seedling, and number of spikelet per panicle in pot seedling. Path coefficients showed higher direct effect of panicle number and 1000-grain weight on yield in tray seedling, and spikelet number per panicle and panicle number in pot seedling. Number of tillers of each order in tray seedling for both transplanting time were different with the order of primary tiller, main stem, and secondary tiller. Pot seedling had more primary tiller than main stem and secondary which were similar in both transplanting time.
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