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http://dx.doi.org/10.5333/KGFS.2002.22.3.213

Studies on the Growth Characteristics, Forage Yields and Nutritive Values of Heading and Headless Types of Sorghum X Sudangrass Hybrids  

임영철 (축산기술연구소)
성병렬 (축산기술연구소)
최기준 (축산기술연구소)
임용우 (축산기술연구소)
김기용 (축산기술연구소)
임근발 (축산기술연구소)
박근제 (축산기술연구소)
Publication Information
Journal of The Korean Society of Grassland and Forage Science / v.22, no.3, 2002 , pp. 213-220 More about this Journal
Abstract
The growth characteristics, forage yields and nutritive values of heading and headless types of sorghum $\times$ sudangrass(Sorghum bicolar L.) hybrids were examined to evaluate the adaptability of new cultivars at Suwon and Chunahn for two years from 2000 to 2001 in a randomized complete block design with three replications. Eleven cultivars of heading type and 4 cultivars of headless type were used in this study. The dry matter(DM) yield of AG 2501 was highest in the heading type cultivars, and PAC F8350 in the headless type cultivars, respectively. The DM yields of heading types were slightly higher than those of headless types but there were not significantly different. Early growth and regrowth characteristics of heading type was highest in AG 2501 and GW 9110G, respectively. GW 9110G and DMD were early heading types, and AG 2501 and GW 9161F were middle heading types. AG 2501 was longest and GW 9161F was shortest in plant height. Cultivars with long leaf length were appeared to be larger fur leaf width and stem diameter. Brix content was highest in DMD as 9.7%, and disease and insect resistances were not significantly different among the heading types. Early growth of headless type cultivar, PAC F8350 was slightly lower than that of Jumbo but stronger in regrowth, wider in leaf width and stem diameter, and stronger in lodging. Comparisons of growth characters between heading and headless types of cultivars were not easy in general but between them, brix contents of heading types ranging from 6.7 to 7.9% were greatly higher than those of headless types ranging from 3.6 to 3.9%. Nutritive values such as crude protein, ADF, NDF and digestibility of headless type cultivars were higher than those of heading types. In conclusion, of heading type cultivars, GW 9110G, AG 2501, DMD and GW 9161F, and of headless type cultivars, Jumbo and PAC F8350 were recommended as high yielding cultivars with good adaptability in domestic environment.
Keywords
Sorghum $\times$ Sudangrass Hybrid; Cultivar; Dry matter yield; Growth characters; Nutritive value;
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