The seasonal growth and low forage quality of kikuyu restrict milk production. The aim of this study was to
determine the yield and nutritional value of irrigated kikuyu over-sown with perennial, Italian or Westerwolds
ryegrass grazed by dairy cows. The three pasture systems reached optimum growth during different months and
seasons. Lowest growth rates occurred during winter. Peak growth rates occurred during spring for the Italian
ryegrass–kikuyu, summer for the Westerwolds ryegrass–kikuyu, and late spring and early summer for perennial
ryegrass–kikuyu pasture. All three pasture systems had similar total annual dry matter yields (kilograms dry matter
[DM] per hectare) during year 1, but the perennial ryegrass–kikuyu pasture achieved a higher annual DM yield
during year 2. As kikuyu density increased in kikuyu–ryegrass pastures from winter to summer, the DM and neutral
detergent fibre content increased, whereas the metabolisable energy content decreased. All three treatments
were deficient in calcium during all seasons and in phosphorus during summer and autumn as a pasture for
high-producing dairy cows.
Grewar, John Duncan; Allen, J.G.; Guthrie, Alan John(South African Veterinary Association, 2009-12)
An outbreak of annual ryegrass toxicity occurred on a Thoroughbred stud in Ceres in the Western Cape Province of South Africa. This is the 1st report of annual ryegrass toxicity in horses in South Africa, although the ...
van Heerden, Ranier(University of Pretoria, 2018-04-19)
The performance of grazing dairy cows, when supplemented with high levels of a maize-based concentrate, could potentially be improved in terms of higher milk and milk protein production by improving the essential amino ...
Van der Colf, Janke(University of Pretoria, 2010-06-27)
Kikuyu (Pennisetum clandestinum) is highly productive during summer and autumn and capable of supporting high cattle stocking rates., The winter and spring production of kikuyu, however, is low, while forage quality, and ...