Factors affecting<i>in sacco</i>dietary degradation by Ankole cattle grazing natural range pastures in Uganda

Okello, S.; Sabiiti, E.N.; Schwartz, H.J.

doi:10.2989/10220110509485875

Cited by 4 publications

(2 citation statements)

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“…The dominant woody vegetation species included Acacia sp., Rhus natalensis and Carissa edulis (personal observations). Dominant grass species are Themeda triandra, Cynodon dactylon, Panicum maximum, Brachiaria decumbens, Sporobolus pyramidalis, Laudetia kagerensis and Hyparrhenia filipendula (Okello, Sabiiti, and Schwartz 2005). The soils are mainly classified as Leptosols, Acric ferrasols, Lixic ferrasols, Gleyic arenosols, Gleysols and Histosols (FAO 1990).…”

Section: Study Area Descriptionmentioning

confidence: 99%

Proxy quantification and mapping of seasonal rangeland herbage using grass cover in the cattle corridor of Uganda

et al. 2013

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This study aimed at estimating herbage mass functional relationship with rainfall and selected soil morphological properties using Geographic Information Systems (GIS). Herbage mass as dry matter (DM) measurements from quadrat harvesting method and estimations based on grass cover were done. Herbage on 1 × 1 m quadrats was harvested and oven dried at 60 • C until constant weight. Grass cover data collection was based on spectral strata of vegetation cover types obtained from Landsat image. Rainfall data were collected from 14 rain gauge stations. Soil profiles were described and their drainage was determined. A multi-linear regression analysis was performed to determine the relationship among DM, grass cover, rainfall effectiveness and soil drainage. The relationships among the variables were integrated using ModelBuilder in ArcGIS 9.3 to come up with spatial and seasonal herbage distribution. Results showed a strong relationship among the above variables and DM (R 2 = 0.76; p < 0.001). Grass cover was found to be the important variable for herbage DM determination (R 2 = 0.73; p < 0.001). A correlation analysis of estimated and harvested DM resulted in a positive relationship (R 2 = 0.85). Estimated DM ranged between 895 and 1923 kg/ha with the highest DM during March-May and the lowest during September-November. This study demonstrated that grass is an important proxy measure of spatial and seasonal patterns of rangeland herbage mass. Therefore, rangeland herbage can in reality be monitored based on grass cover measurements to avoid or at least minimize the cost, destruction and information timeliness implications that are known to be associated with harvesting methods.

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Section: Study Area Descriptionmentioning

confidence: 99%

Proxy quantification and mapping of seasonal rangeland herbage using grass cover in the cattle corridor of Uganda

et al. 2013

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“…Carrying capacity of rangelands utilized in the Ankole grazing system in Uganda has been previously modeled [1], and has been found to be highly dependent on rainfall patterns, thus subject to strong seasonality. Pasture nutrient resources (sampled in approximately 2-mo intervals corresponding to wet/dry seasons)-measured as either average dry matter production [1] or crude protein content [2]-were also highly variable; cattle body condition and productivity decline with the dry season and recover during wet seasons. Although animals can respond to lower available forage in the dry season behaviorally through selective feeding and browsing, pasture nonetheless provides primary nutrition year-round.…”

Section: Introductionmentioning

confidence: 99%

Nutrient Composition of Pastures in Kayunga District, Uganda: A Preliminary Investigation with Implications for Seasonal Supplementation in Grazing Ruminants

Dierenfeld¹,

Lukuyu²,

Nyagaka³

2014

AJPS

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Proximate nutrient composition (crude protein, non-fiber carbohydrates, crude fiber, and ash), fiber fractions (neutral detergent fiber (NDF), acid detergent fiber (ADF), lignin), and both macro-(calcium (Ca), phosphorus (P), magnesium (Mg), potassium (K), sodium (Na), and sulfur (S)) and trace (copper (Cu), iron (Fe), manganese (Mn), molybdenum (Mo), and zinc (Zn)) mineral profiles were quantified in mixed pasture samples collected during the wet (n = 8) and dry (n = 15) seasons in north central Uganda. Metabolizable and Net Energy values for dairy production were estimated based on standard calculations, and samples were compared seasonally. Crude fat (p = 0.05) and lignin (p = 0.01) values were lower in the dry season compared with the wet season, linked with reduced plant growth. Crude protein (13.0% of dry matter (DM)), fiber fractions, and calculated energy content did not vary seasonally in this data set, and reflected chemical components of a grass-dominated system that appeared energetically limiting for production livestock. Mineral constituents varied more dramatically by season, with Ca, Mg, Cu, and Mn lower (all < 0.05) and K higher in the dry season. Sodium was deficient in these pastures, whereas Ca, P, Mg, S, Cu, and Zn concentrations may have been only marginally sufficient, particularly to meet needs for lactation, dependent on season. These limited data suggest that a high-energy mineral supplement may prove beneficial in meeting nutritional and production needs of multiple grazing ruminant species in this region, particularly during dry seasons. E. S. Dierenfeld et al. 986

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Behavioural response of pure Ankole and crossbred (Ankole×Holstein) cows to seasonal pasture variations in south-western Uganda

Idibu

Kabi

Mpairwe

2016

Applied Animal Behaviour Science

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Factors affectingin saccodietary degradation by Ankole cattle grazing natural range pastures in Uganda

Cited by 4 publications

References 0 publications

Proxy quantification and mapping of seasonal rangeland herbage using grass cover in the cattle corridor of Uganda

Proxy quantification and mapping of seasonal rangeland herbage using grass cover in the cattle corridor of Uganda

Nutrient Composition of Pastures in Kayunga District, Uganda: A Preliminary Investigation with Implications for Seasonal Supplementation in Grazing Ruminants

Behavioural response of pure Ankole and crossbred (Ankole×Holstein) cows to seasonal pasture variations in south-western Uganda

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