Effect of the treatment of split on the nutritive value of rice (Oryza sativa L.) straw
1997
Enishi, O. (Hokuriku National Agricultural Experiment Station, Joetsu, Niigata (Japan)) | Shijimaya, K.
Nutritive value,energy balance and rumen fluid characteristics in goats offered chopped (CR) or splited (SR) rice straw rations were measured. Both rice straw rations were added soybean meal in order to adjust to 12% of crude protein (CP) content. The CP and either extract content of rice straw tended to be decreased by the treatment of split, but there were no apparent differences in other constituents between the chopped and splited rice straws. The digestibilities of organic cell wall and acid detergent fiber of SR ration tended to be higher than those of the CR ration, while the content of digestible crude protein of SR ration was significantly lower than CR ration. The gross energy intake, digestible energy intake, metabolizable energy intake and methane excretion in SR ration were significantly higher than in CR ration. There were no significant differences is heat production, energy retention and other energy measurements between CR and SR rations. In the rumen fluid characteristics, the ruminal pH value was lower and ammonia nitrogen and volatile fatty acid were higher at 4 hours after feeding than before feeding but significant differences between CR and SR ration were not observed. It appeared that the treatment of split had an effect on feeding value of rice straw by increasing the energy intake more than by increasing the nutritive value
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