Browsing by Author "Ferreira, Gonzalo"
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- Clearance of Biodegradable Polymer and Polyethylene Films from the Rumens of Holstein Bull CalvesGalyon, Hailey; Vibostok, Samuel; Duncan, Jane; Ferreira, Gonzalo; Whittington, Abby; Havens, Kirk; McDevitt, Jason; Cockrum, Rebecca R. (MDPI, 2023-03-03)Due to the occurrence of plastic impaction in ruminants and its deleterious effects on health and production, it is necessary to determine the suitability of biodegradable polymers to replace polyethylene-based agricultural plastics, such as hay netting. The objectives of this study were to evaluate the clearance of a polyhydroxyalkanoate (PHA) and poly(butylene succinate-co-adipate) (PBSA) melt-blend polymer from the rumen when fed to cattle and subsequent animal health. Twelve Holstein bull calves were dosed with an encapsulated 13.6 g of PBSA:PHA (Blend), 13.6 g of low-density polyethylene (LDPE), or four empty gelatin capsules (Control) for 30 d. The feed intake, body weight, and body temperature were evaluated, and hemograms were run on d 0 and d 30. On d 31, calves were euthanized to evaluate gross rumen measurements and pathology, papillae length, and polymer residues in rumen contents. No calves presented any signs related to plastic impaction. The feed intake; body weight; rectal temperature; hematological parameters; gross rumen measurements and pathology; and rumen pH and temperature were not affected by treatments. Calves dosed with LDPE had 27 g of undegraded polymer retained in the rumen while Blend calves had only 2 g of fragmented polymers that were 10% of their original size. Agricultural plastics developed from PBSA:PHA may be a suitable alternative to LDPE-based products in the case of animal ingestion and may reduce the incidence of plastic impaction.
- Comparative Nutritional Quality of Winter Crops for SilageFerreira, Gonzalo; Brown, A. N.; Thomason, Wade E.; Teutsch, Christopher D. (Virginia Cooperative Extension, 2017-02-23)Discusses how cropping grasses and legumes planted as winter crops affects crop yield and nutrients for forage and also later affects crop yield and nutrients for corn and sorghum silage crops.
- Dairy Pipeline November/December 2019Ferreira, Gonzalo; White, Alexander B. (Virginia Cooperative Extension, 2019)Information about alfalfa for feed and business practices.
- Dairy Pipeline, April 2020Ferreira, Gonzalo; Martel, Cynthia (Virginia Cooperative Extension, 2020)Discussion of decreasing revenues and monitoring herd size, and a discussion of how to make your grass thrive after last year's hot dry summer.
- Dairy Pipeline, July/August 2019Siegle, Laura; Ferreira, Gonzalo (Virginia Cooperative Extension, 2019-07-08)The first article in this issue discusses work safety on the farm, while the second article discusses supplementation of live yeasts for dairy cattle.
- Dairy Pipeline, July/August 2020Ferreira, Gonzalo; Daniels, Kristy M.; Seekford, Zack (Virginia Cooperative Exension, 2020-06-19)multiple KPIs exist for evaluating the management of the dairy farm, and managers should not get overwhelmed monitoring these. However, as a coin has two sides, most common KPIs have a counterbalancing KPI. Once in a while, evaluate both KPIs for a more holistic and realistic analysis of your farm management.
- Dairy Pipeline, June 2018White, Alexander B.; Ferreira, Gonzalo (Virginia Cooperative Extension, 2018-05-30)This issue has two articles. The first one focuses on financial planning, while the second one discusses the Margin Protection Program for dairy farms.
- Dairy Pipeline, June 2019Ferreira, Gonzalo; Spurlin, Kevin (Virginia Cooperative Extension, 2019-06-03)This issue has two articles. The first discusses compost materials (wood shavings, sawdust, etc.) used as bedding for dairy cattle, and mentions advantages and disadvantages. The second focuses on checking cornfields in spring for pests, weeds, and planting success.
- Dairy Pipeline, March 2017Petersson-Wolfe, Christina S.; Ferreira, Gonzalo; Martel, Cynthia (Virginia Cooperative Extension, 2017-02-28)This issue has two articles. The first article discusses monitoring the status of farm debt, while the second one provides information about potential pathogens in cattle manure.
- Dairy Pipeline, March 2018Siegle, Laura; Ferreira, Gonzalo (Virginia Cooperative Extension, 2018-03-01)This issue has two articles; the first focuses on smart phone applications for use on the dairy farm, while the second discusses hulless barley in food rations for lactating dairy cows.
- Dairy Pipeline, March 2019Daubert, Jeremy; Ferreira, Gonzalo (Virginia Cooperative Extension, 2019-02-27)This issue has two articles. The first one focuses on the importance of communication to future success of farms. The second one discusses farm safety issues.
- Dairy Pipeline, October 2017Ferreira, Gonzalo; Overbay, Andy (Virginia Cooperative Extension, 2017-10-04)This issue has two articles, the first examines family farms, inheritance, and the transition of ownership from one generation to the next. The second article examines feed costs of corn silage.
- Dairy Pipeline. April 2016Martel, Cynthia; Ferreira, Gonzalo; James, Robert E. (Virginia Cooperative Extension, 2016-03-31)This issue contains two articles. The first article focuses on problems with mud and the health effects of muddy fields and lots on dairy cattle. The second article discusses the density of corn planting for silage production in terms of dry matter yield, and nutrition.
- Dairy Pipeline. January/February 2016James, Robert E.; Gleason, Claire B.; Ferreira, Gonzalo; Spurlin, Kevin (Virginia Cooperative Extension, 2016-01-07)Articles in this issue provide details on feeding regimens for cattle, and on the quality of fats in milk.
- Dairy Pipeline. June 2016James, Robert E.; Ferreira, Gonzalo (Virginia Cooperative Extension, 2016-05-31)Discusses baled silage, or baleage, and compares these feeds to hays in terms of quality, drying, fermentation, and nutritional value.
- Dairy Pipeline. June 2017Enger, Kellie; Ferreira, Gonzalo; Petersson-Wolfe, Christina S.; Teets, Christy L. (Virginia Cooperative Extension, 2017-06-22)This issue includes an article about the use of antibiotics in the dairy industry, and an article about preventing silage-related injuries and fatalities.
- Dairy Pipeline. March 2014Ferreira, Gonzalo; Daubert, Jeremy (Virginia Cooperative Extension, 2014-02-27)Discusses silage shrinkage and provides an overview of the 2014 farm bill.
- Dairy Pipeline. March 2015James, Robert E.; Dietrich, Alyssa; Ferreira, Gonzalo (Virginia Cooperative Extension, 2015-03-02)This issue of Dairy Pipeline includes articles on protecting your calves' health with biosecurity protocols, should winter crops be considered cover crops in dairy farming systems, and a list of upcoming activities.
- Dairy Pipeline. October 2013Ferreira, Gonzalo; Winston, David R. (Virginia Cooperative Extension, 2013-09-25)Discusses when to breed cows after calving and making dairy information systems work.
- Dairy Pipeline. October 2014James, Robert E.; Ferreira, Gonzalo; Spurlin, Kevin (Virginia Cooperative Extension, 2014-09-30)This issue deals with the importance of crop rotation and strategies for extra dairy profits.
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