Comparison of nutritive value of rice (Oryza sativa L.) straw among different varieties and strains
1995
Enishi, O. (Hokuriku National Agricultural Experiment Station, Joetsu, Niigata (Japan)) | Shijimaya, K. | Ohta, H.
Rice (Oryza sativa L.) straws of four varieties and strains (Akichikara, Koshihikari, Hokuriku 147 and Hokuriku 148) were compared on nutritive value. In order to investigate the digestibility and energy balance of rice straw, four Japanese native goats were fed rice straw at maintenance TDN level by using a Latin square design. Rice straws were adjusted with soybean meal so that crude protein content was 12%. Culm length (cm) and straw yield (DM kg/a) in Koshihikari were higher than those in other varieties. There was no apparent difference among the varieties and strains in chemical composition. However, acid detergent lignin content tended to be lower in Hokuriku 147. Digestibility of dry matter, organic matter, ether extract, organic cell wall, acid detergent fiber, cellulose and energy of Hokuriku 147 were higher than the other varieties. Total digestible nutrient, digestible energy and metabolic energy in Hokuriku 147 were higher than those in Akichikara and Koshihikari. Energy excretion in feces and urine was lower in Hokuriku 147 than those in Akichikara and Koshihikari. It is suggested that differences in nutritive value of rice straw are mainly dependent on digestibility of fiber ingredient and energy excretion in feces and urine
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