Forage shortage and low forage quality during the winter season are critical in Florida during some years. Pensacola bahiagrass (Paspalum notatum Flugge) produces massive stolon‐root systems with relatively high crude protein concentrations if adequate nutrients are supplied. Preliminary in vitro digestion studies with these stolons indicated high digestibility. An experiment was initiated to study the feed value of this material and to determine the feasibility of using it during critical winter periods. Stolon evaluation was made by chemical analyses and by feeding trials with sheep to determine voluntary intake and nutrient digestibilities. Chopped stolons were mixed with chopped bahiagrass hay to give variable hay:stolon ratios. Each ration was supplemented with 10% molasses and 10% soybean meal. Dry matter and crude protein contents for all rations were approximately 86 and 12.5%, respectively. No difference was found in intake of organic matter or digestible organic matter among treatments. Cellulose digestibility decreased as the proportion of stolons in the rations was increased, but crude protein digestibility increased. Animals on all treatments averaged gains in excess of 5 kg during the 21‐day period. The chopped stolons were not readily accepted by sheep, but the addition of molasses and soybean meal markedly improved palatability. Cattle withheld from feed for 2 days consumed the stolons satisfactorily.
Objetivo. Analizar la importancia de la reconversión de los sistemas convencionales a sistemas agroecológicos de producción porcícola a través de sistemas de alimentación no convencionales en el trópico. Materiales y métodos. Se revisaron 122 artículos y se seleccionaron 100, la base de la reseña se orientó a la utilización de alimentos alternativos, con el mayor peso de las citas, sin desestimar el resto de los temas. Resultados. Se dispone de tecnologías y resultados en productos y subproductos que se generan de la caña de azúcar, variedades de altos rendimientos de yuca y boniato, el cultivo de plantas arbóreas proteínicas con alto valor nutricional y el efecto de aditivos con significativos resultados, por mejorar la digestibilidad y la salud sin altos costos. Cerdos en pastoreo implica una contribución significativa en diferentes sistemas, sean de subsistencia o manejo intensivo. La integración de la producción porcina a la agricultura puede convertirse en una de las cadenas que mejor aprovechen la biomasa y energía fotoquímica en estos cultivos; otros factores, como la genética, las instalaciones y el reciclaje a partir del uso de la cama profunda y biodigestores son necesidad frente al cambio climático. El cerdo, además de ser un animal prolífico y adaptable a diferentes condiciones, puede alimentarse de forma no convencional y utilizarse como el principal suministro de proteína animal para consumo humano, sus excreciones pueden reciclarse a través de diferentes tecnologías y disminuir la carga contaminante. Conclusión. El cerdo en el trópico tiene gran importancia para los países en desarrollo por las condiciones sociales, económicas y tecnológicas que contribuyen a la economía circular y a la soberanía alimentaria.
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