Feeding value, digestibility and effect of combining hay cube in whole crop paddy rice silage and ammoniated whole crop paddy rice at the flowering stage

Taji, K.; Quinitio, L.F.

Journal of Japanese Society of Grassland Science 38(1): 16-25

1992


ISSN/ISBN: 0447-5933
Accession: 002382001

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Abstract
Whole crop paddy rice (PR) was harvested at the flowering stage (FS) and ensiled (FSS) and/or ammoniated (AFS) to compare their feeding value and their effect when combined with hay cube (HC) using sheep. The rations used in Experiment 1 were FSS alone, HC alone and their mixtures prepared at the time of feeding with FSS:HC ratios of approximate 70:30, 30:70 on DM basis. The rations used in Experiment 2 were AFS alone, HC alone and their mixtures prepared at the time of feeding with AFS: HC ratios of approximate 70:30, 30:70 on DM basis. Dry matter, OM, CP, CEL, LIG and mineral components i.e. Ca, Mg, P, K and Na contents increasd while NFE, CF, ash, ADF, HEMI, NDF, SiO-2 and ST contents decreased in FSS and AFS with increasing levels of HC. Nitrogen content in AFS was almost twice as high as that in FSS. Ensiled PR and ammoniated PR showed the same tendency in the nutrient contents when different levels of HC were mixed. Digestibilities of DM, CP and EE increased while OM, CF, ADF, CEL, HEMI, NDF and ST digestibilities decreased in FSS and AFS with increasing levels of HC. Digestibilities of AFS were always higher than those of FSS. Significantly higher (p lt 0.05) digestibilities of AFS were obtained in OM, HEMI and ST compared to those of FSS. In the digestible nutrients, DCP and TDN in AFS were significantly higher (p lt 0.05) than those in FSS. This indicates that treatment with ammonia was preferable since significantly higher DCP and TDN values can be obtained. In the digestible nutrients of FSS or AFS combined HC and HC rations, DCP was high in HC compared to FSS and AFS. TDN in FSS slightly increased while TDN in AFS slightly decreased with increasing levels of HC but TDN in FSS combined HC and TDN in AFS combined HC were not significantly different (p gt 0.05) with each other.