Aim of study: To evaluate diets with different proportions of butterfly pea hay (BH) and cactus pear meal (CM) on the intake and digestibility of nutrients, productive performance, feeding behavior and physiological parameters of crossbred Boer kids. Area of study: Northwest of Brazil. Material and methods: 32 crossbred Boer intact male goats were distributed in a randomized block design, with four treatments with different proportions of BH and CM in the diets, partially replacing elephant grass on a total dry matter (DM) basis: 0% BH + 0 % CM as a control, 83% BH + 17% CM, 67% BH + 33% CM, and 50% BH + 50% CM. Each treatment group included eight animals. The experiment lasted 84 days preceded by 15 days of adaptation. Main results: Kids fed the control diet had the greatest intake of neutral detergent fiber, hemicellulose, water intake via food, time to feed and the lowest feed conversion (p<0.05) compared to BH+CM diets. Diet 83% BH+17% CM provided less digestibility of neutral detergent fiber, greater efficiency of DM intake and lower efficiency of DM and neutral detergent fiber rumination (p<0.05) compared to other diets. Diet 67% BH+33% CM resulted in greater digestibility of dry and organic matter, weight gains and longer (p<0.05) chewing time (seconds/cud) compared to other diets. Diet 50% BH+50% CM showed lower (p<0.05) intake of acid detergent fiber, time for rumination, efficiency of ingestion of neutral detergent fiber and rectal temperature, and longer (p<0.05) idle times compared to other diets. Research highlights: Partial substitution of elephant grass with 67% BH and 33% CM increased digestibility and weight gain of crossbred Boer kids, without changing nutrient and water intake in the finishing.
Devido ao aumento da ovinocultura nos últimos anos, práticas de manejo precisaram ser aprimoradas para suportar o maior número de animais por área, porém é preciso observar cada atividade produtiva individualmente. Assim, objetivou-se analisar a viabilidade econômica e os componentes que exercem maior influência sobre o custo da terminação de ovinos em pasto de capim-tifton 85. O estudo foi realizado em duas etapas. Na etapa 1, realizou-se experimento visando avaliar a produção do capim-tifton 85 irrigado com efluente de tanque de piscicultura e fertilizado com NPK nos níveis de zero, 33, 67, 100, e 150% do recomendado pelo manual de análise de solo de Pernambuco-PE. Na etapa 2, consistiu do estudo da viabilidade econômica da terminação de ovinos simulada para áreas de 10 ha com base nos resultados da produção alcançados na etapa 1. Realizaram-se cálculos de custo fixo, variável, operacional, total, margem bruta e líquida além da lucratividade e rentabilidade. Os maiores custos foram com a terra e à compra de borregos. A margem bruta foi positiva para todos os sistemas, já a margem líquida, a lucratividade e a rentabilidade, constatou-se que no sistema que não foi fertilizado apresentou valores negativos (R$ -70.832,56, -19,14% e -16,06%) inviabilizando a atividade. O sistema com maior fertilização do solo (150% do recomendado de NPK) foi o mais lucrativo e economicamente viável, pois apresentou valores positivos para os índices de lucratividade (17,39%) e rentabilidade (21,06%), superior aos demais, já o sistema que não utiliza fertilização é inviável, pois apresenta lucratividade e rentabilidade negativa. A B S T R A C T Due to increase in sheep production in recent years, handling practices needed to be improved to support the largest number of animals per area, However is necessary to observe each productive activity individually. So, this study aimed to analyze the economic viability and the components that have more influence on the cost of sheep termination in pasture of Tifton 85. The study was conducted in two stages. In stage 1, was held experiments to evaluate the production of irrigated Tifton 85 with fish pond effluent and fertilized with NPK in zero levels; 33, 67, 100 and 150% of the recommended by soil analysis manual of Pernambuco-PE. In stage 2, of the study of the economic viability of the ovine simulated termination for a 10 ha area based on the results of production achieved in stage 1. Was carried fixed cost calculations, variable, operational, total, gross margin and net, beyond of lucrativity and profitability. The higher costs were with the land and the purchase of lambs. The gross margin was positive for all systems, since the net margin, the lucrativity and profitability, it was found that the system was not fertilized with negative values (R $ -70,832.56, -19.14% and -16.06%) impeding the activity. The system with greater soil fertilization (NPK 150% recommended) was the most lucrative and economically viable, because presented positive values for the lucrativity indices (17.39%) and profitability (21.06%), superior to the others already the system does not use fertilization is unfeasible because it presents lucrativity and negative profitability. Keywords: Cynodon spp., fertilization, lucrativity, viability of the production.
This paper aims to assess the contribution of basal and aerial tillers to structural and productive characteristics of Tifton 85 bermudagrass, irrigated with fish tank wastewaters and fertilized with NPK. The experiment was conducted in the city of Petrolina-PE, Northeastern Brazil. The evaluated area had 960 m 2 subdivided into five treatments and ten replicates, in a completely randomized design. Treatments consisted of different fertilization rates of NPK (0, 33, 67, 100, and 150%) as recommended by the Handbook of Fertilization Recommendations for the State of Pernambuco, and based on a prior soil analysis. Irrigation water came from fishponds with Nile Tilapia fingerlings. The experiment was divided into four intervals of 27, 29, 18, and 21 days respective to the first, second, third, and fourth cuts. Both tiller types were analyzed for number of individuals, culm length and diameter, fully-and partially-expanded leaves, leaf length and width (fully or partially expanded), dry mass of leaves (fully and partially expanded and total), culm, dead tissue, and total tiller, and the ratio of leaf and culm. Both structural and productive characteristics showed a linear growth trend for both types, with emphasis on the basal tillers. Thus, a suitable supply of nutrients is crucial for grasses, mainly NPK, as these are macronutrients of vital importance in physiological processes. In addition to the nutrients supplied via fish farming wastewater, fertilization with 150% of the recommended amount of NPK promoted a greater structural development of the tillers, increasing their productivity levels. ResumoEste trabalho teve como objetivo avaliar a contribuição dos perfilhos basais e aéreos do capim-tifton 85, nas suas características estruturais e produtivas, quando irrigado com efluentes de tanque de piscicultura e recebendo adubação com NPK. O trabalho foi conduzido no município de Petrolina-PE, e a área útil utilizada foi de 960 m 2 dividida em cinco tratamentos e dez repetições, em delineamento experimental inteiramente casualizado. Os tratamentos foram compostos por diferentes níveis de adubação com NPK (0, 33, 67, 100 e 150%) conforme recomendado pelo manual de análise de solo do estado de Pernambuco-PE, sendo que antes das adubações foram realizadas as análises do solo. A água para irrigação foi oriunda de tanques de piscicultura povoados com alevinos de Tilápia do Nilo. O experimento foi dividido em quatro intervalos com 27, 29, 18 e 21 dias para o primeiro, segundo, terceiro e quarto corte, respectivamente. As variáveis analisadas foram: número de perfilhos basais e aéreos, comprimento e diâmetro do colmo, número de lâmina foliar expandida e em expansão, comprimento e largura de lâmina foliar expandida e em expansão das duas categorias de perfilhos, além da massa seca da lâmina foliar expandida, em expansão e total, do colmo, tecido morto e por unidade de perfilho, assim como a relação lâmina foliar/colmo dos dois tipos de perfilhos, basal e aéreo. Verificou-se crescimento linear das características e...
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