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http://dx.doi.org/10.5333/KGFS.2022.42.4.243

Effects of Feeding the Whole Crop Rice Silage on the Milking Performance of Holstein and Profitability  

Ji Yung Kim (College of Animal Life Science, Kangwon National University)
Byung Ku Yoon (Kangwon Province Pyeongchang Agriculture Technology Center)
Byong Wan Kim (College of Animal Life Science, Kangwon National University)
Kyung Il Sung (College of Animal Life Science, Kangwon National University)
Publication Information
Journal of The Korean Society of Grassland and Forage Science / v.42, no.4, 2022 , pp. 243-248 More about this Journal
Abstract
This study was conducted to evaluate the effect of feeding the whole crop rice silage (WCRS) which partially replaces the imported grass hay crop on the milking performance of Holstein and profitability. Two experimental diets were used according to the traditional practice of dairy farms. The control diet (C) was composed of 13kg/day of mixed hay, 6.8kg/day concentrate, and orchardgrass/bermudagrass hay (1.8kg/day). The treatment diet (T) was composed of 9.6kg/day of mixed hay, 6.8kg/day of concentrate and 2.2kg/day of WCRS. The CP content of the WCRS (4.6%) was lower than orchardgrass (11.3%) and bermudagrass hay (8.4%) due to the harvest being 30days later than the optimum harvest date of rice. The lower intake was observed in T during the entire experiment period which seems to be related to the higher proportion of fiber in rice (p<0.05). No significant difference was found in milk production between C (26.9kg) and T (26.3kg) during the entire experiment period (p>0.05). Also, no difference in milk fat, milk protein, total solids, and milk composition was observed between the two diets. Higher income per head was resulted in T (21,141won) compared to C (21,915 won). These results indicate that the partial replacement of the grass hay by the WCRS can bring the profit to the dairy farm due to the no difference between the control diet and the treatment diet.
Keywords
Milking performance; Partially replace; Profitability; Whole crop rice silage;
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