The silent cattle breeders in central Nicaragua

Peer Revie

Sustainable milk and beef production in Nicaragua: actions and opportunities for an inclusive value chain

In Nicaragua the cattle sector accounts for 36% of agricultural exports and presents an important opportunity for smallholder farmer livelihoods. Current extensive dual-purpose (milk and beef) cattle production leads to soil degradation, deforestation, high levels of greenhouse gas (GHG) emissions per unit of product, and a shift of the agricultural frontier towards the vulnerable Caribbean region. The CGIAR Research Program on Livestock and Fish is implementing activities to make the dual-purpose cattle value chain more efficient, competitive and inclusive, with a specific focus on gender equality. Feed and forages work has improved the productivity of forage-based livestock production (up to 100% in terms of kg milk/ha), increased carbon accumulation and at the same time reduced its ecological footprint (by over 50% in terms of GHG emissions per unit of product) as part of LivestockPlus. This concept addresses sustainable intensification in three ways: socioeconomic – market opportunities and policy application; ecological – improved farm and natural resource management practices; and genetic – improved forage cultivars. Work on genetic improvement of cattle has included establishing an information, input, and service data platform linked to breed improvement in a wider farm-household context. It involves continuous monitoring and assessment of the performance of the predominant breed-types reared by 155 farmers in central Nicaragua as an initial step towards informing development of breeding strategies for dual purpose cattle in mixed farming systems. In collaboration with a farmers cooperative, capacity development in Farmer Field Schools and on-farm research involving 1000 farmers has resulted in increased productivity (milk by 40%, liveweight by 70%), income (by 20%) and natural resource integrity (establishment of 4,000 ha of silvopastoral systems). Strategic alliances have been developed between value chain actors (farmers' organisations, NGOs, research, private sector with a focus on value addition to livestock products while increasing gender equity. In general, however, adoption of improved technologies and practices is still low. There is therefore a strong need for an increased policy incidence on sustainable livestock development and incentive mechanisms for farmers and other value chain actors, including certification of sustainable livestock products

Effects of maturity and drying method on the nutritive value of tropical grasses in Nicaragua

Tropical grasses are key components for both grazing and conserved forages in sustainable livestock systems (beef and dairy) in Central America. The objective of the study was to evaluate grasses used in Nicaragua and their nutritive value contribution as preserved forage during the dry season under different drying methods. Five tropical bunch grass species were sampled across different farms in Nicaragua in 2014 and 2015 using three replications (Andropogon gayanus, Hyparrhenia rufa, Urochloa brizantha, Megathyrsus maximus, and Cenchrus purpureus). Forage samples were collected at 2, 4, 6, and 8-wk maturity as well as season long samples. Samples drying methods included sun- and oven-dried. Sun-dried samples were air dried outdoors for five days while oven-dried used forced air at 55 oC. Samples were processed to pass a 1-mm screen and analyzed for nutritive value using wet chemistry protocols for crude protein (CP), acid detergent fiber (ADF), neutral detergent fiber (NDF) and in vitro total digestibility (IVTD). Drying methods did not influence CP, ADF, NDF and IVTD concentrations. There were significant differences among grass species in CP levels (P=0.0003), ADF (P=0.0009), and IVTD (P=0.0083). U. brizantha had the greatest CP concentration (79 g/kg) while C. purpureus had the lowest CP (44 g/kg). U. brizantha had the lowest ADF (340 g/kg) concentration relative to the rest of the species. A. gayanus, H. rufa, and Megathyrsus maximus had similar NDF concentrations. In vitro total digestibility ranged from 680 to 750 g/kg with M. maximus having the lowest digestibility. Significant differences in nutritive value were observed among maturity stages for CP (P<0.0001), ADF (P = 0.0022), NDF (P = 0.0006), and IVTD (P=0.0241). Forage species decline markedly with maturity, but U. brizantha maintained greater CP and IVTD concentrations compared other species, indicating that could be a more preferred species for off-season feeding