The accumulation of nitrate in Kikuyu grass (Pennisetum clandestinum Hochst)
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A review of kikuyu grass (Pennisetum clandestinum) poisoning in cattle.
K ikuyu grass ( Pennisetum clandestinum ) is a perennial pasture species with a spring to autumn growth habit. Although it is usually grazed without ill effect, spasmodic incidents of poisoning in cattle 1 and, to a much lesser extent, sheep 2 and goats, 3 have been encountered. The aetiology and pathogenesis of kikuyu poisoning remains poorly understood. Outbreaks are characteristically acute ...
متن کاملModelling the growth and utilisation of kikuyu grass (Pennisetum clandestinum) under grazing. 2. Model validation and analysis of management practices
This paper presents validation results and some management applications of a Tropical Pasture Simulator. The eects of dierent environmental conditions, N fertilisation regimes and grazing intensities are analysed, and physiological concepts are used to aid in the interpretation of the responses obtained. The model demonstrates the importance of ̄exible management guidelines depending on envir...
متن کاملModelling the growth and utilisation of kikuyu grass (Pennisetum clandestinum) under grazing. 1. Model de®nition and parameterisation
This paper describes a Tropical Pasture Simulator. This is a simple mechanistic model representing the growth of vegetative tropical pastures under rotational or continuous grazing with responses to N fertiliser, temperature and irradiance that can be used as a tool to study management options for the development of sustainable grazing systems. The model was derived as an adaptation of the `Hur...
متن کاملKikuyu (Pennisetum clandestinum) intake determined by alkanes administered in a xantham gum suspension
The alkane method of measuring herbage intake in ruminants was compared with actual intake determined by transponder-controlled feed gates (Calan gates). Kikuyu (Pennisetum clandestinum) intakes of yearling bulls (Holstein-Friesland and Hereford) were measured for a period of seven days. No significant effect of breed on intake was found. Herbage intake calculated from the alkane technique (mea...
متن کاملParasites in sheep grazing on Kikuyu (Pennisetum clandestinum) pastures in the winter rainfall region.
Regular worm counts were done post-mortem on sheep that had grazed on Kikuyu pastures at the Elsenburg Research Station near Stellenbosch, a winter rainfall region. Major species were Trichostrongylus colubriformis, Trichostrongylus axei, while Ostertagia circumcincta was usually present in large numbers. Minor species were Haemonchus contortus, Nematodirus spathiger, Dictyocaulus filaria, Oeso...
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ژورنال
عنوان ژورنال: South African Journal of Plant and Soil
سال: 1987
ISSN: 0257-1862,2167-034X
DOI: 10.1080/02571862.1987.10634946