Effects of Harvest Stages and Ensiling Method on Nutritive Values and Quality of Sorghum × Sorghum Hybrid Silage
2011
Choi, K.C., National Institute of Animal Science, RDA, Cheonan, Republic of Korea | Song, C.E., Chonnam National University, Gwangju, Republic of Korea
This study was carried out to investigate the effect of harvest stage of Sorghum × Sorghum Hybrid (SSH) and manufacture methods of SSH silage on nutritive values and quality of SSH silage manufactured with SSH grown in paddy land of Department of Animal Resources Development, National Institute of Animal Science, RDA. SSH "SS405" was harvested at two different growth stages (heading and ripen stage) and ensiled at each harvest stages. The content of crude protein in both square baled SSH silage (SBSS) and bag silage (BS) increased with delayed harvest maturity, but the contents of ADF (acid detergent fiber), NDF (neutral detergent fiber) decreased. The contents of ADF and NDF was not influenced by the inoculation of lactic bacteria. The contents of TDN (total digestible nutrient) in both stage and in vitro dry matter digestibility (IVDMD) in heading stage was not influenced by the harvest stage of SSH. The pH in all SSH silage ranged from 3.8 to 4.4 at two different harvest stages, and pH in heading stage was higher than that of ripen stage (P less than 0.05). The content of lactic acid of all SSH silage increased with delayed harvest maturity (P less than 0.05), but the content of acetic acid decreased (P less than 0.05). The contents of lactic acid and acetic acid in ripen stage were not influenced by manufacture method of silage. The content of lactic acid in both SBSS was higher than that of both BS and RBSS in heading and ripen stage (P less than 0.05), but the content of acetic acid decreased (P less than 0.05). The contents of lactic acid and acetic acid in BS were similar as compared to that of RBSS. Therefore, we suggest that the quality of SSH silage in both heading and ripen stage can be improved by manufacture methods of SBSS and BS.
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