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Ruminant productivity in the tropical Africa has remained low despite decades of research on animal nutrition and introduction of new breeds of animals mainly because of low-quality feeds available, especially during the dry season that is inefficiently utilised. This results in prolonged time fo...


Korir, D.Goopy, John P.Gachuiri, C.Butterbach-Bahl, KlausEckard, R.Anderson, C.[Supplementation with Calliandra calothyrsus improves nitrogen retention in cattle fed low-protein diets]Supplementation with Calliandra calothyrsus improves nitrogen retention in cattle fed low-protein diets

Greenhouse gas (GHG) emission measurements from livestock excreta in Africa are limited. We measured CH4 and N2O emissions from excreta of six Boran (Bos indicus) and six Friesian (Bos taurus) steers near Nairobi, Kenya. The steers were fed one of three diets (T1 [chaffed wheat straw], T2 [T1 + C...


Pelster, David E.Gisore, B.Goopy, John P.Korir, D.Koske, J.K.Rufino, Mariana C.Butterbach-Bahl, Klaus[Methane and nitrous oxide emissions from cattle excreta on an East African grassland]Methane and nitrous oxide emissions from cattle excreta on an East African grassland
Gakige, Jesse K.Gachuri, C.Butterbach-Bahl, KlausGoopy, John P.[Sweet potato (Ipomoea batatas) vine silage: A cost-effective supplement for milk production in smallholder dairy-farming systems of East Africa?]Sweet potato (Ipomoea batatas) vine silage: A cost-effective supplement for milk production in smallholder dairy-farming systems of East Africa?

Onyango, Alice A.Goopy, John P.[Application of nutrient concentration of cattle faeces to develop algorithms estimating apparent in vivo digestibility and metabolisable energy of tropical ruminant forages]Application of nutrient concentration of cattle faeces to develop algorithms estimating apparent in vivo digestibility and metabolisable energy of tropical ruminant forages
Wassie, Shimels E.Ali, A.I.M.Korir, DanielButterbach-Bahl, KlausGoopy, John P.Merbold, LutzSchlecht, E.Dickhoefer, Uta[Effects of feed intake level on efficiency of microbial protein synthesis and nitrogen balance in Boran steers consuming tropical poor-quality forage]Effects of feed intake level on efficiency of microbial protein synthesis and nitrogen balance in Boran steers consuming tropical poor-quality forage
Onyango, A.A.Dickhoefer, UtaRufino, M.C.Butterbach-Bahl, KlausGoopy, John P.[Temporal and spatial variability in the nutritive value of pasture vegetation and supplement feedstuffs for domestic ruminants in western Kenya]Temporal and spatial variability in the nutritive value of pasture vegetation and supplement feedstuffs for domestic ruminants in western Kenya

Pelster, David E.Butterbach-Bahl, KlausRufino, Mariana C.Goopy, John P.Rosenstock, Todd S.[Improving estimates of GHG emission factors from livestock production systems on smallholder farms]Improving estimates of GHG emission factors from livestock production systems on smallholder farms

This study was designed to screen a large number of sheep to identify individuals with high and low methane (CH4) production, and to estimate repeatability and heritability of CH4 emissions in sheep, utilising portable accumulation chambers (PAC) designed for in-field use. Mature ewes (n = 710) s...


Goopy, John P.Robinson, D.L.Woodgate, R.T.Donaldson, A.J.Oddy, V.H.Vercoe, P.E.Hegarty, R.S.[Estimates of repeatability and heritability of methane production in sheep using portable accumulation chambers]Estimates of repeatability and heritability of methane production in sheep using portable accumulation chambers

Enteric methane emissions from livestock constitute a greater part of anthropogenic greenhouse gases (GHGs) in Africa, than in more industrialised economies, providing a strong incentive for the development of low methane phenotype ruminants. Although dietary and husbandry options already exist f...


Goopy, John P.[Creating a low enteric methane emission ruminant: What is the evidence of success to the present and prospects for developing economies?]Creating a low enteric methane emission ruminant: What is the evidence of success to the present and prospects for developing economies?

Sánchez, Pedro A.Korir, DanielAli, A.I.M.Goopy, John P.Merbold, LutzSchlecht, E.Dickhoefer, U.[Feed intake, apparent total tract digestibility, and nitrogen balance in Boran steers fed with three grasses grown alone or intercropped with Lablab purpureus]Feed intake, apparent total tract digestibility, and nitrogen balance in Boran steers fed with three grasses grown alone or intercropped with Lablab purpureus

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