Planting Date and Hybrid Influence on Silage Corn Yield and Quality at Paddy Field in Middle Region
2010
Ju, J.I., Chungnam Provincial ARES, Yesan, Republic of Korea | Seung, Y.G., Chungnam Provincial ARES, Yesan, Republic of Korea | Kim, C.G., National Institute of Crop Science, RDA, Suwon, Republic of Korea | Lee, H.B., Chungnam National University, Daejeon, Republic of Korea
Few management studies have been conducted on late planting date for corn silage in paddy field as a barley-corn forage cropping system. Experiments were conducted during 2007 and 2008 at the Chungnam Agricultural Research and Extension Services. The objectives of this study were to determine relationships between planting date and corn forage yield and to determine the best hybrid at the delayed planting after whole crop barley's harvest. The treatments consisted of 2 planting dates and 7 hybrids. Delayed planting considerately reduced stem diameter, individual ear size and weight. The ratio of dried leaf and culm in aerial plants was increased and that of ear was decreased. The coefficient of variation in fresh, dry matter (DM) and total digestible nutrients (TDN) yield was higher at delayed planting date on cropping system with whole crop barley than that of planting at optimum season. So, fresh weight was reduced by 91.8%, dry matter by 72.6%, grain yield by 51.0% and TDN yield by 68.1%. The appropriate hybrid for delayed planting after whole crop barley harvest in middle region was 'Gangdaok' as lower in the reduction of ear size and weight compared to that of planting at optimum season. Reduction in grain yield caused to decrease the DM and TDN yields. Therefore, to gain stable dry matter in silage corn by delayed planting date on cropping system with whole crop barley was necessary to select corn hybrid on the minimum reduction in ear size and weight.
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