Comparison of chemical composition and nutritive value of italian ryegrass (Lolium multiflorum Lam.) among different varieties
1997
Enishi, O. (Hokuriku National Agricultural Experiment Station, Joetsu, Niigata (Japan)) | Shijimaya, K. | Tase, K. | Fujii, H. | Egara, K.
The chemical composition and in vitro dry matter digestibility (IVDMD) of nine Italian ryegrass (Lolium multiflorum Lam.) varieties were investigated at first cutting, second cutting and third cutting. And the nutritive values of six varieties were evaluated at first cutting in this study. The organic matter content was high and crude protein and either extract content were low mostly in the order of first cutting, second cutting and third cutting. On the contrary, IVDMD of second and third cuttings were lower than those of first cutting general. Dry matter digestibility, energy digestibility, total digestible nutrient, digestible energy and metabolizable energy of Uzukiaoba were higher than those of other varieties. Nutrient yields of Miyukiaoba and Nagahahikari were higher than those of other varieties. Nitrogen intake and nitrogen excretion in urine of Uzukiaoba, Waseaboba and Tachiwase were higher than those other varieties, and there were no apparent differences in nitrogen excretion in feces. There were no apparent differences in energy intake, energy excretion in urine, in methane and heat production. Energy excretion in feces of Uzukiaoba was lower than that of other varieties. From the above, it should be emphasized that nutritive value have to be taken into account when we select to use Italian ryegrass in company with dry matter yield,operation aptitude and cropping system
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