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Browsing Research Articles (Animal and Wildlife Sciences) by Author "Van Wyngaard, Josef de Villiers"

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Effect of concentrate feeding level on methane emissions, production performance and rumen fermentation of Jersey cows grazing ryegrass pasture during spring

Van Wyngaard, Josef de Villiers; Meeske, R.; Erasmus, Lourens Jacobus (Elsevier, 2018-07)

Dietary supplementation has been well documented as an effective enteric methane (CH4) mitigation strategy. However, limited studies have demonstrated the effect of concentrate level on enteric CH4 emissions from grazing ...
Effect of concentrate level on enteric methane emissions, production performance and rumen fermentation of Jersey cows grazing kikuyu-dominant pasture during summer

Van Wyngaard, Josef de Villiers; Meeske, Robin; Erasmus, Lourens Jacobus (American Dairy Science Association, 2018-11)

The effect of concentrate feeding level on enteric methane (CH4) emissions from cows grazing medium quality summer pasture is yet to be investigated. Sixty multiparous Jersey cows (9 rumen-cannulated) were used in a ...
Effect of dietary nitrate on enteric methane emissions, production performance and rumen fermentation of dairy cows grazing kikuyu-dominant pasture during summer

Van Wyngaard, Josef de Villiers; Meeske, R.; Erasmus, Lourens Jacobus (Elsevier, 2018-10)

Dietary nitrate supplementation is an effective methane (CH4) mitigation strategy in total mixed ration based diets fed to ruminants. To date, limited information is available on the effect of dietary nitrate on CH4 ...
Effect of palm kernel expeller as supplementation on production performance of Jersey cows grazing kikuyu-ryegrass pasture

Van Wyngaard, Josef de Villiers; Meeske, R.; Erasmus, Lourens Jacobus (Elsevier, 2015-01)

The aim of the study was to determine the effect of different inclusion levels of palm kernel expeller (PKE) in dairy concentrates for grazing Jersey cows on lactation performance and rumen fermentation patterns. Forty-eight ...
Technical note: A simple back-mounted harness for grazing dairy cows to facilitate the sulfur hexafluoride tracer gas technique

Van Wyngaard, Josef de Villiers; Meeske, R.; Erasmus, Lourens Jacobus (American Dairy Science Association, 2018-03)

We describe here a cattle harness to attach a gas collection vessel to facilitate the sulfur hexafluoride (SF6) tracer gas technique. The harness consists of 2 major components: (1) a lightweight, robust body fabricated ...

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Browsing Research Articles (Animal and Wildlife Sciences) by Author "Van Wyngaard, Josef de Villiers"

Browsing Research Articles (Animal and Wildlife Sciences) by Author "Van Wyngaard, Josef de Villiers"

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