新奇
发表于 2025-3-25 03:25:05
Raymond B. Seymour,Charles E. Carraher Jr.ny difference between breed types (Tedeschi .., 2002). A recent focus on genetic selection for increased feed efficiency has led to greater efforts to quantify individual feed intakes on farms and research institutes. This study has combined several of those data sets, including . and . cattle, in h
迎合
发表于 2025-3-25 08:13:31
https://doi.org/10.1007/978-981-13-0511-5uctive performances. In such conditions, individuals’ robustness could be estimated by indicators of animal adaptive abilities which account for energy variations across the productive cycle. In mature suckler cows, the net energy requirements for production are low (30%) compared to those for maint
Nonflammable
发表于 2025-3-25 12:29:11
https://doi.org/10.1057/9781403981813. Yaks are known to be well adapted to cope with low oxygen partial pressure, low temperatures and the harsh mountain environment (Wiener .., 2003), and the resulting energy deficiency. Less information is available on the adaptive capabilities of yak crossbreds. Crossbreeding is a strategy to obtai
Asseverate
发表于 2025-3-25 19:21:39
https://doi.org/10.1057/978-1-137-57761-0; NRC, .). Nevertheless, energy and protein requirements of livestock in warm area could differ from those of temperate area. The objective of this study was to estimate energy and protein requirements of ruminants in tropical and warm area using a meta-analysis.
谄媚于人
发表于 2025-3-25 21:28:22
Climate Wrongs and Human Rights ingested in products. Current feeding systems for goats still comprise information extrapolated from sheep and/or cattle. However, the data obtained with these species should not be used for goats, because of differences between these species, such as dietary habits, physical activity, milk and car
牵索
发表于 2025-3-26 02:28:22
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flex336
发表于 2025-3-26 05:12:55
https://doi.org/10.1007/4-431-28916-X milk production. Additionally, it is also critical to improve the efficiency of energy utilization for milk production to reduce both cow’s metabolic load and feed costs. We have begun work to estimate the impact of roughage to concentrate ratio in the diet on energy metabolism of the lactating cow
bacteria
发表于 2025-3-26 10:06:56
https://doi.org/10.1057/9780230373044ain (ADG) decreased when starch from corn was replaced with sources of digestible fiber; i.e. soybean hulls, wheat middlings, or distiller‘s dried grains with soluble (Hill .., 2008; Suarez-Mena .., 2012). Additionally, limited recent research has not demonstrated consistent ADG responses to manipul
全等
发表于 2025-3-26 13:39:54
H. Oleak,K.-H. Schmidt,H.-J. Tredern pH and increase outflow of ruminal starch for more efficient digestion in the small intestine (Abramson ., 2005). Yahaghi . (2012) reported that partially substituting barley by sorghum significantly increased growth rate of lambs because of increased outflow of starch to the intestine and higher
DECRY
发表于 2025-3-26 20:20:16
https://doi.org/10.1007/978-3-642-85297-8nal protozoa play a major role in ruminal protein degradation to ammonia and are involved in fibre digestion. Their role in, and response to, concentrate-based diets is well known. However, the effects of extensive grass-based diets on the composition of the protozoa population in the rumen are poor