Search

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 m2 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.

Devido ao aumento da ovinocultura nos ultimos anos, praticas de manejo precisaram ser aprimoradas para suportar o maior numero de animais por area, porem e preciso observar cada atividade produtiva individualmente. Assim, objetivou-se analisar a viabilidade economica e os componentes que exercem maior influencia sobre o custo da terminacao de ovinos em pasto de capim-tifton 85. O estudo foi realizado em duas etapas. Na etapa 1, realizou-se experimento visando avaliar a producao do capim-tifton 85 irrigado com efluente de tanque de piscicultura e fertilizado com NPK nos niveis de zero, 33, 67, 100, e 150% do recomendado pelo manual de analise de solo de Pernambuco-PE. Na etapa 2, consistiu do estudo da viabilidade economica da terminacao de ovinos simulada para areas de 10 ha com base nos resultados da producao alcancados na etapa 1. Realizaram-se calculos de custo fixo, variavel, operacional, total, margem bruta e liquida alem da lucratividade e rentabilidade. Os maiores custos foram com a terra e a compra de borregos. A margem bruta foi positiva para todos os sistemas, ja a margem liquida, a lucratividade e a rentabilidade, constatou-se que no sistema que nao foi fertilizado apresentou valores negativos (R$ -70.832,56, -19,14% e -16,06%) inviabilizando a atividade. O sistema com maior fertilizacao do solo (150% do recomendado de NPK) foi o mais lucrativo e economicamente viavel, pois apresentou valores positivos para os indices de lucratividade (17,39%) e rentabilidade (21,06%), superior aos demais, ja o sistema que nao utiliza fertilizacao e inviavel, pois apresenta lucratividade e rentabilidade negativa. Normal 0 false false false PT-BR X-NONE X-NONE /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Tabela normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin:0in; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:"Calibri",sans-serif; mso-ansi-language:PT-BR; mso-fareast-language:PT-BR;} 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.