Zobrazeno 1 - 10
of 100
pro vyhledávání: '"G.I. Zanton"'
Publikováno v:
Journal of Dairy Science, Vol 107, Iss 9, Pp 6742-6757 (2024)
ABSTRACT: Urine output and urinary urea-N excretion (UUNe) excretion are critical measures to accurately evaluate N metabolism in lactating dairy cows and environmental concerns related to manure N. The objectives of this study were: (1) to compare e
Externí odkaz:
https://doaj.org/article/eb9f5f627af3491280165f4bfd89d0ab
Autor:
G.I. Zanton, M.Z. Toledo
Publikováno v:
JDS Communications, Vol 5, Iss 4, Pp 293-298 (2024)
Balancing dairy cow diets for AA is an effective strategy to reduce dietary CP concentration, maintain levels of productivity, and increase nitrogen use efficiency. Most studies evaluating supplemental rumen-protected Met (sRPMet) focus on cows in es
Externí odkaz:
https://doaj.org/article/1d21a075d5bc4d21a2385fff3aa95e23
Publikováno v:
Journal of Dairy Science, Vol 106, Iss 12, Pp 8774-8786 (2023)
ABSTRACT: Limited research has examined the interaction between dietary crude protein (CP) level and CP feeding pattern. We tested CP level (low protein [LP], 13.8%; high protein [HP], 15.5% CP, dry matter [DM] basis) and CP feeding pattern (OF = osc
Externí odkaz:
https://doaj.org/article/0fc5f28f55fd4b0392c4dda409d8f1cb
Publikováno v:
Journal of Dairy Science, Vol 105, Iss 12, Pp 9581-9596 (2022)
ABSTRACT: Dairy cow responses to dietary crude protein (CP) may depend on stage of lactation. The primary objective of this study was to evaluate the effects of 4 concentrations of dietary CP on dry matter intake (DMI), production performance, net en
Externí odkaz:
https://doaj.org/article/359257c327aa45de97ebe2873454288b
Publikováno v:
Journal of Dairy Science, Vol 105, Iss 9, Pp 7446-7461 (2022)
ABSTRACT: Biohydrogenation-induced milk fat depression (MFD) is a reduction in milk fat synthesis caused by bioactive fatty acids (FA) produced during altered ruminal microbial metabolism of unsaturated FA. The methionine analog 2-hydroxy-4-(methylth
Externí odkaz:
https://doaj.org/article/181d65f048b748d58e76cd61780cde94
Publikováno v:
Journal of Dairy Science, Vol 105, Iss 6, Pp 5044-5061 (2022)
ABSTRACT: Our aim was to explore whether changes in plasma essential AA (EAA) concentration ([EAA]p) or profile (defined here as the molar proportion of individual [EAA]p relative to the total [EAA]p) may serve as an indicator of the EAA status of a
Externí odkaz:
https://doaj.org/article/89f0829f3a084f88b2b1392d58350c90
Autor:
M.B. Hall, G.I. Zanton
Publikováno v:
Journal of Dairy Science, Vol 105, Iss 5, Pp 3939-3953 (2022)
ABSTRACT: Little data is presently available on our ability to predict the combined effect of modifying diets with feeds rich in sugars or starch (ST) and rumen-degradable protein (RDP) on the performance of high-producing dairy cows. The objective o
Externí odkaz:
https://doaj.org/article/429d2ef733054c42b5ea6af9e8750862
Autor:
G.I. Zanton, M.B. Hall
Publikováno v:
Journal of Dairy Science, Vol 105, Iss 5, Pp 3954-3968 (2022)
ABSTRACT: Our objective was to evaluate cow N metabolism and ruminal measures with diets containing 3 different levels of molasses or finely ground dry corn grain with 2 levels of ruminally degradable protein (RDP). Twelve lactating, ruminally cannul
Externí odkaz:
https://doaj.org/article/852f81f482b94627b30ea046eced36ba
Publikováno v:
Animal, Vol 7, Iss 2, Pp 272-278 (2013)
The objective of this study was to determine the effects of varying forage particle length on chewing activity, sorting behavior, rumen pH and rumen fill in late lactation and dry dairy cattle, fed rations with similar physically effective NDF but di
Externí odkaz:
https://doaj.org/article/58da27b22fca4beca2f965631379e5ff
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