Diets formulated for dairy cattle are designed to supply nutrients, but rations delivered to the animal may deviate from original formulations, resulting in implications for milk production, composition, and even pregnancy rate. The objective of this study was to evaluate retrospective feed mixing records collected from 8 commercial dairy farms over 52 wk. Farms ranged from 2,982 to 29,783 animals, producing 31.8 ± 5.93 (±SD) kg of milk with 4.14 ± 0.461% fat and 3.26 ± 0.218% protein. Data collected included daily TMR nutrient deviation, calculated as diet nutrient content minus the observed divided by the formulated diet concentrations of CP, fat, NDF, and starch. Data were analyzed with fixed effects of time (modeled as 28-d periods) and days of positive nutrient deviation in fat, CP, NDF, and starch with each nutrient alone and in combination with the other nutrients, random effects of herd, and repeated measure of time within herd. The nutrient deviation by farm averaged (±SD) 1.68 ± 2.655, 2.28 ± 4.473, 1.75 ± 2.621, and 1.47 ± 2.147% for CP, fat, NDF, and starch, respectively. Days of positive nutrient deviation per period averaged (±SD) 25.5 ± 3.47, 25.5 ± 3.72, 25.6 ± 3.49, and 25.9 ± 2.61, respectively. Dry matter intake (DMI; 17.2 ± 1.78 kg/d) decreased with increasing positive deviation days in starch (-0.0483 ± 0.01265) and increased with increasing positive deviation days in CP (0.0211 ± 0.00942). Milk yield (31.4 ± 2.50 kg/d) increased with positive deviation days in starch (0.0486 ± 0.02110) and decreased with increased positive deviation days in NDF (-0.0298 ± 0.02202). Finally, pregnancy rate (21.7 ± 4.34) increased with increasing positive deviation days in fat (0.385 ± 0.1635) and decreased with increasing positive deviation days in CP (-0.420 ± 0.1879). For these models, period significantly affected milk yield but was not observed to affect pregnancy rate and DMI. Results suggest farm and nutrient type were significant sources of variation, and overall, farms overfeed nutrients CP, fat, NDF, and starch 92% of the days of a 28-d period.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC11624398 | PMC |
| http://dx.doi.org/10.3168/jdsc.2024-0564 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Psychosocial moderators of the association between pain intensity and physical function in people with systemic sclerosis.
J Scleroderma Relat Disord
January 2025
Department of Physical Medicine and Rehabilitation, University of Michigan, Ann Arbor, MI, USA.
Background: Pain is a prevalent symptom of systemic sclerosis. While previous studies have demonstrated a correlation between higher pain intensity and lower physical function in individuals with systemic sclerosis, the potentially moderating effect of psychosocial factors on the association has yet to be explored.
Methods: This cross-sectional study used data from a fatigue self-management trial for adults with systemic sclerosis.
Currently in wheat breeding, genome wide association studies (GWAS) have successfully revealed the genetic basis of complex traits such as nitrogen use efficiency (NUE) and its biological processes. In the GWAS model, thresholding is common strategy to indicate deviation of expected range of -(s), and it can be used to find the distribution of true positive associations under or over of test statistics. Therefore, the threshold plays a critical role to identify reliable and significant associations in wide genome, while the proportion of false positive results is relatively low.
View Article and Find Full Text PDFPatients' views and experiences of the first community pharmacy-based medication therapy management clinic in the Middle East and North Africa (MENA): A qualitative study.
Can Pharm J (Ott)
January 2025
Saudi Innova Healthcare Company, Riyadh, Saudi Arabia.
Objective: This qualitative study aimed to describe patients' experiences of a community pharmacy (CP)-based medication therapy management program (MTM).
Methods: Qualitative, semistructured, face-to-face interviews were conducted with a purposive sample of patients with uncontrolled diabetes who received care at a CP-based MTM clinic. Interviews were conducted in the MTM clinic of Health Kingdom CP in Riyadh City, Kingdom of Saudi Arabia by a research pharmacist using an interview guide.
Restless legs syndrome without insomnia and antenatal depressive symptoms.
BMC Pregnancy Childbirth
January 2025
Department of Mental Health, Graduate School of Medicine, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8654, Japan.
Background: Restless legs syndrome (RLS) with insomnia is presumed to be associated with antenatal depression. RLS without insomnia, however, has not been investigated in association with antenatal depression. We aimed to examine whether RLS without insomnia during pregnancy is associated with antenatal depressive symptoms.
View Article and Find Full Text PDFThe regional ventilation distribution monitored by electrical impedance tomography during anesthesia induction with head-rotated mask ventilation.
Physiol Meas
January 2025
Department of Anesthesiology, Fudan University Shanghai Cancer Center, 270 Dong An Road, Xuhui, Shanghai, 200032, China, Shanghai, Shanghai, 200032, CHINA.
Abstract Objective: Abnormal regional lung ventilation can lead to undesirable outcomes during the induction of anesthesia. Head rotated ventilation has proven to change the airflow of upper airway tract and be effective in increasing the tidal volume. This study aimed to investigate the influence of head rotated mask ventilation on regional ventilation distribution during the induction phase of anesthesia.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!