Objetivo Tropical, integrated, smallholder farming systems are often constrained by natural resources (land,water,climate,disease resistant crops and animals) and socio-economic conditions(little capital,less educated labour,high input cost and low produce prices). Ruminant productivity (meat, milk, wool, draught) is usually low.Production level depends on low quality roughages, increasingly on fibrous agro-industrial by-products,of which (rice) straws in Asia are abundantly available, and supplementary feeds are expensive (cocentrates, minerals or require space (legumes,tree fodders).(1) The nutritive value of rice straw differs significantly between cultivars, of which a few show a nutritive value sufficiently high to support maintenance requirements.This variation exceeds the increase in nutritive value brought about by costly,urea-ammonia treatment.The accuracy of prediction of this variation bY in-Sacco or in-vitro digestibility parameters showed to be quite lOW,and requires further lab work on factors effecting feed intake. (2)For moderate production levels,available protein and minerals are major constraints,and the efficiency of utilisation of the crop residues largely depends on availability,type,quality and cost of supplements and minerals. Growing or purchasing of supplements and mineral supply require further socio-economic studies of logistics and cost for different beneficiaries. (3)Within (rice) straw cultivars,irrespective of seasons and locations, a significant variation prevails.Additional information is needed on the extent to which this variation is related to the stage of senescene during harvest.(4)Within livestock species,a significant variation in feed intake capacity emerged.The heritability of this trait remains to be established. (5)A positive relationship was found between rice straw intake and the level of excess feed.Sheep showed preference to those parts of rice straw with the lesser nutritive value.The impact of this aspect requires further study in comparion with other straws,and in cattle considered to be less selective.(6)Further,attention will be paid to control of those parasites(worms, flukes,ticks,fleas)that cause considerable losses of production depending on the animal's age,grazing and environmental conditions.(7)The adoption of technologies and the formulation of future basic research priorities are evaluated in connection with economic outcome as constrained by farmer Ámbito científico natural sciencesbiological sciencesbiochemistrybiomoleculesproteinssocial scienceseconomics and businesseconomicsproduction economicsproductivityagricultural sciencesagriculture, forestry, and fisheriesagricultureindustrial cropsfodderagricultural sciencesanimal and dairy sciencedomestic animalsanimal husbandryagricultural sciencesagriculture, forestry, and fisheriesagriculturegrains and oilseedslegumes Programa(s) FP3-STD 3 - Specific research and technological development programme (EEC) in the field of the life sciences and technologies for developing countries, 1990-1994 Tema(s) Data not available Convocatoria de propuestas Data not available Régimen de financiación CSC - Cost-sharing contracts Coordinador Landbouwuniversiteit Wageningen Aportación de la UE Sin datos Dirección 40,Marijkeweg 6709 PG Wageningen Países Bajos Ver en el mapa Coste total Sin datos Participantes (6) Ordenar alfabéticamente Ordenar por aportación de la UE Ampliar todo Contraer todo Baif Development Research Foundation India Aportación de la UE Sin datos Dirección Senapati Bapat Marg 411016 Pune Ver en el mapa Coste total Sin datos Gadjah Mada University Indonesia Aportación de la UE Sin datos Dirección JL. Agro Karangmalang Bulaksumur 55281 Yogyakarta Ver en el mapa Coste total Sin datos ROWETT RESEARCH INSTITUTE Reino Unido Aportación de la UE Sin datos Dirección GREENBURN ROAD AB21 9SB ABERDEEN Ver en el mapa Enlaces Sitio web Opens in new window Coste total Sin datos University of Brawijaya Indonesia Aportación de la UE Sin datos Dirección 161,Jl. Mayjen Haryono 65145 Malang Ver en el mapa Coste total Sin datos University of Peradeniya Sri Lanka Aportación de la UE Sin datos Dirección Peradeniya Ver en el mapa Coste total Sin datos Veterinary Research Institute Sri Lanka Aportación de la UE Sin datos Dirección 15,Old Galaha Road Peradeniya Ver en el mapa Coste total Sin datos