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Ruminant Nutrition and Forage Utilization
Asian-Australasian Journal of Animal Sciences 1993;6(1): 37-40.
https://doi.org/10.5713/ajas.1993.37    Published online March 1, 1993.
Improvement in the nutritive value of rice straw by treatment with urine of goats
S. Hasan, M. Shimojo, I. Goto
This study was conducted to measure the improvement in nutritive value of rice straw by treatment with urine of goat under different temperatures. Straw samples were japonica I (comprising 15 varieties with culms longer than 123 em and mean silica content of 13.0%), japonica II (comprising 20 varieties with culms less than 87 cm and mean silica content of 13.7%), indica I (Java 14 variety with a high content of silica of 13.9%) and indica II (comprising IR-8 and IR-20 varieties with a low content of silica of 11.0%). Urine was collected from four Japanese Saanen goats fed alfalfa hay. The different straws were sprayed with urine at the rate of 1 ml/g straw DM, put in double layer plastic bags, sealing and stored for 4 weeks at either 20째C (GU-20) or 40째C (GU-40). The in vitro dry matter digestibility (IVDMD) and organic matter digestibility (IVOMD) of the straws were improved by the GU-40 treatment (13.5% and 13.2%, but the GU-20 treatment had little effect of digestibility (1.5% and -0.2%) except with the low silica indica II varieties. The GU-40 treatment tended to decrease NDF and hemicellulose content of straws. Crude protein content of the straws was improved by both the GU-20 and GU-40 treatments. It was concluded that treatment of rice straw with goat urine at 40째C for 4 weeks improved the crude protein content and digestibility in vitro, the greatest improvement occurring with straws of lowest digestibility in the untreated state.
Keywords: Crude Protein; Digestibility; Goat; Rice Straw; Silica; Urine Treatment

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