Publication Date
1985
Location
Kyoto Japan
Description
Sorghum-sudangrass hybrid (Sorghum bicolor L. Moench) is one of the most important annual grasses utilized for supplemental summer forage. For better forage production, this experiment was carried out to investigate the effects of the different nitrogen (N) rate, cutting height, cutting stage on the dead stubble, carbohydrate reserves (CHO-R) in stubble, and regrowth of forage sorghum-sudangrass hybrid. The cultivar used in the present study was Pioneer 988. The experiment was arranged as a split plot design and undertaken over a period of 5 months from May to September, 1981 and 1982 in Suweon, Korea. The dead stubble after cutting was found to be great with high rate of N fertilizer, low cutting height and early cutting stage. It was also learned that the rainfall during forage harvest period made the dead stubble increased. Generally a higher content of CHO-R in stubble after harvest was observed in the high stubble height and the low N level. Also early cutting at the first harvest rapidly decreased CHO-R in the stubble. The critical soluble carbohydrate content causing the death of stubble was supposed to be 3 to 4%. The regrowth after harvest was considerably influenced by climatic conditions. In conclusion, this study suggests, that more yield of forage sorghum-sudangrass hybrid (Pioneer 988) could be obtained from the 5cm cutting height on sunny days with high temperature, the 15cm stubble on rainy days or low temperature, the early heading stage for the first cutting, the 3 harvest times/yr. in Korea, and the 150 to 200 kg N/ha.
Citation
Seo, S and Kim, D A., "Effect of Nitrogen and Cutting Management on the Dead Stubble, Carbohydrate Reserves in Stubble, and Regrowth of Forage Sorghum-Sudangrass Hybrid" (1985). IGC Proceedings (1985-2023). 4.
(URL: https://uknowledge.uky.edu/igc/1985/ses14/4)
Included in
Agricultural Science Commons, Agronomy and Crop Sciences Commons, Plant Biology Commons, Plant Pathology Commons, Soil Science Commons, Weed Science Commons
Effect of Nitrogen and Cutting Management on the Dead Stubble, Carbohydrate Reserves in Stubble, and Regrowth of Forage Sorghum-Sudangrass Hybrid
Kyoto Japan
Sorghum-sudangrass hybrid (Sorghum bicolor L. Moench) is one of the most important annual grasses utilized for supplemental summer forage. For better forage production, this experiment was carried out to investigate the effects of the different nitrogen (N) rate, cutting height, cutting stage on the dead stubble, carbohydrate reserves (CHO-R) in stubble, and regrowth of forage sorghum-sudangrass hybrid. The cultivar used in the present study was Pioneer 988. The experiment was arranged as a split plot design and undertaken over a period of 5 months from May to September, 1981 and 1982 in Suweon, Korea. The dead stubble after cutting was found to be great with high rate of N fertilizer, low cutting height and early cutting stage. It was also learned that the rainfall during forage harvest period made the dead stubble increased. Generally a higher content of CHO-R in stubble after harvest was observed in the high stubble height and the low N level. Also early cutting at the first harvest rapidly decreased CHO-R in the stubble. The critical soluble carbohydrate content causing the death of stubble was supposed to be 3 to 4%. The regrowth after harvest was considerably influenced by climatic conditions. In conclusion, this study suggests, that more yield of forage sorghum-sudangrass hybrid (Pioneer 988) could be obtained from the 5cm cutting height on sunny days with high temperature, the 15cm stubble on rainy days or low temperature, the early heading stage for the first cutting, the 3 harvest times/yr. in Korea, and the 150 to 200 kg N/ha.
