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Milheto-gr o (Pennisetum glaucum (L.) R.Br.) como substituto do milho em ra es para poedeiras comerciais
Café M.B.,Stringhini J.H.,Mogyca N.S.,Fran?a A.F.S.
Arquivo Brasileiro de Medicina Veterinária e Zootecnia , 1999,
Abstract: Avaliaram-se o desempenho produtivo e a qualidade dos ovos de poedeiras comerciais alimentadas com milheto como substituto do milho em ra es de postura. Duzentas poedeiras comerciais, da linhagem LSL Lohmann branca, com 30 semanas de idade, receberam ra es com níveis crescentes de substitui o da energia metabolizável fornecida pelo milho por milheto. As aves foram distribuídas em um delineamento inteiramente ao acaso com cinco tratamentos, cinco repeti es e 10 aves por repeti o. Foram avaliados a porcentagem de postura, o consumo de ra o, a convers o alimentar em termos de dúzias e de massa de ovos, o peso médio de ovos, a porcentagem de casca e de gema, e a porcentagem de clara. N o se observou diferen a estatística significativa em todas as características. O índice de colora o de gema, pelo leque colorimétrico Roche, apresentou pior colora o à medida que os níveis de milheto foram crescentes nas ra es. Os resultados indicam que o milheto n o afetou o desempenho produtivo das aves, devendo-se recomendar o seu uso com pigmentantes sintéticos ou naturais.
Milheto (Pennisetum glaucum (L.) R.Br.) como substituto do milho em ra es para codornas-japonesas em postura (Coturnix coturnix japonica)
Leandro N.S.M.,Stringhini J.H.,Café M.B.,Fran?a A.F.S.
Arquivo Brasileiro de Medicina Veterinária e Zootecnia , 1999,
Abstract: Avaliou-se o desempenho de codornas-japonesas em postura alimentadas com níveis crescentes de milheto-gr o na ra o. Duzentas codornas com 70 dias de idade, submetidas a um delineamento inteiramente ao acaso, com cinco tratamentos e quatro repeti es de 10 aves, receberam níveis de milheto de 0, 25, 50, 75 e 100% em substitui o ao milho em ra es na fase de postura. Foram medidos a produ o e o peso dos ovos, o consumo de ra o, a mortalidade, a colora o da gema pelo leque colorimétrico, e calculada a convers o alimentar em termos de massa e de dúzia de ovos. Os índices de produtividade das codornas n o foram afetados pelos diferentes níveis de substitui o estudados e o milheto-gr o se constituiu em uma fonte de substitui o do milho para codornas-japonesas, devendo-se, porém, incluir na ra o uma fonte de pigmenta o para a gema dos ovos.
Avalia o de clones de capim-elefante (Pennisetum purpureum Schum.) e de um híbrido com o milheto (Pennisetum glaucum (L.) R. Br.) submetidos a estresse hídrico. 2. Valor nutritivo
Barreto Glesser Porto,Lira Mário de Andrade,Santos Mércia Virgínia Ferreira dos,Dubeux Júnior José Carlos Batista
Revista Brasileira de Zootecnia , 2001,
Abstract: O objetivo deste trabalho foi avaliar o valor nutritivo de três cultivares de capim-elefante (Cameroon, Roxo de Botucatu e Mott) e de um híbrido de capim-elefante com o milheto (híbrido HV-241), cultivados sob diferentes condi es de umidade (com e sem estresse hídrico). Utilizou-se o delineamento em blocos ao acaso com parcelas subdivididas e três repeti es. Na parcela principal, estudou-se o efeito dos regimes de umidade e nas subparcelas, os diferentes clones. Foram avaliados os teores de matéria seca (% MS), proteína bruta (PB) e fibra em detergente neutro (FDN) e a digestibilidade in vitro da matéria seca (DIVMS). Os materiais submetidos a estresse hídrico apresentaram elevado grau de desseca o (mais de 58% de MS), sobretudo os cultivares de capim-elefante. As plantas submetidas a estresse hídrico apresentaram teores de PB (17,58%) significativamente superiores aos das irrigadas (14,45%), sendo que, entre os cultivares, apenas o Cameroon (14,68% PB) diferiu dos demais (16,46% PB). Quanto aos teores de FDN, n o se verificou diferen a entre os dois regimes de umidade, mas os cvs. Mott e Cameroon apresentaram teores superiores (61,79%) aos do cv. Roxo de Botucatu e do híbrido HV-241 (56,60%). N o foi verificada diferen a na DIVMS entre os regimes de umidade nem entre os diferentes clones, sendo o valor médio de 53,07%.
Seletividade do atrazine à cultura do milheto (Pennisetum glaucum)
Dan, H.A.;Barroso, A.L.L.;Procópio, S.O.;Dan, L.G.M.;Finotti, T.R.;Assis, R.L.;
Planta Daninha , 2010, DOI: 10.1590/S0100-83582010000500019
Abstract: pearl millet is an important species cultivated in succession in the brazilian savannah. although the herbicide atrazine presents a potential use in this culture, little has been done to determine the susceptibility of this species according to its stage of development at the time of application. this study aimed to evaluate the selectivity of atrazine to millet (pennisetum glaucum), determining the maximum dosage of implementation and the culture stages with lower sensitivity. two experiments were conducted under greenhouse conditions, by first establishing the selectivity of the herbicide to cultivars adr-300, adr-500 and adr-7010. subsequently, cultivar adr-500 was evaluated in terms of dose response of atrazine during the phenological stage of development. the experiment was arranged in a completely randomized design in a factorial scheme 5 x 3, with four replications, corresponding to five atrazine doses (0; 0.5; 1.5; 2.5 and 4.0 kg a.i. ha-1) applied at three millet growth stages (two, four and eight expanded leaves). adr-500 cultivar showed the highest susceptibility among the cultivars evaluated. applications made at the early stages of millet growth promoted the highest levels of phytotoxicity symptoms, reducing the number of shoots and dry biomass accumulation of the aerial part. these results were intensified by increasing the atrazine dose. with respect to ear mass, doses less than 1.5 kg ha-1 did not significantly affect this variable, regardless of the stage of application. it was concluded that atrazine doses below 1.5 kg ha-1 can be safely applied on growing millet, when the plants present four or more leaves at the time of application.
Milheto-gr?o (Pennisetum glaucum (L.) R.Br.) como substituto do milho em ra??es para poedeiras comerciais
Café, M.B.;Stringhini, J.H.;Mogyca, N.S.;Fran?a, A.F.S.;Rocha, F.R.T.;
Arquivo Brasileiro de Medicina Veterinária e Zootecnia , 1999, DOI: 10.1590/S0102-09351999000200009
Abstract: the production performance and egg quality of laying hens receiving increasing levels of pearl millet grain in rations were studied. two hundred 30-week-old lsl lohmann white hens, allotted in a completely randomized design with five treatments, five replicates with 10 hens, were fed with 0, 25, 50, 75 and 100% of pearl millet grain in rations as corn substitute. the performance was evaluated by egg production, feed intake, feed conversion in terms of dozen eggs and egg mass, and egg quality measured as egg weight, shell, albumen and yolk porcentages. no differences among treatments were observed for all characteristics, but the yolk color index measured by the roche fan indicated decreasing in yolk colour as the level of pearl millet increased. pearl millet did not affect the production performance, and a synthetic or natural pigment should be included in rations.
Valor nutritivo del pasto maralfalfa (Pennisetum purpureum x Pennisetum glaucum) en condiciones de defoliación Nutritive value of maralfalfa grass (Pennisetum purpureum x Pennisetum glaucum) under defoliation conditions
T Clavero,R Razz
Revista de la Facultad de Agronomía , 2009,
Abstract: El pasto maralfalfa (Pennisetum purpureum x Pennisutum glaucum) es un pasto tropical de alta calidad el cual tiene potencial forrajero para rumiantes, sin embargo quedan interrogantes relacionadas a la respuesta en calidad de acuerdo a las prácticas de defoliación. Un estudio fue realizado en el noroeste de Venezuela dirigido a evaluar el efecto de los intervalos de defoliación sobre la calidad del pasto maralfalfa. El estudio incluyó tres frecuencias de defoliación (3, 6 y 9 semanas). Se utilizó un dise o de bloques al azar con tres repeticiones. Las mediciones incluyeron nitrógeno total (NT), nitrógeno soluble como porcentaje del nitrógeno total (NS/NT), digestibilidad in vitro de la materia seca (IVDMD), contenido de pared celular (CPC), lignina (L) y carbohidratos no estructurales (CNE). Los datos fueron sometidos a un análisis de varianza, utilizando el procedimiento GLM del paquete estadístico SAS. Las comparaciones de las medias se realizaron a través de la prueba de Tukey. El valor nutritivo del pasto maralfalfa declinó de tres a nueve semanas de crecimiento. Para cada intervalo los contenidos de NT disminuyeron significativamente (P<0.05), mientras que, el NS/NT disminuyó lentamente de 3 a 9 semanas; sin embargo en todos los tratamientos sobre el 50% del N es soluble, de fácil asimilación. El contenido de pared celular y lignina incrementaron significativamente (P<0.05) entre 6 y 9 semanas. Los mayores valores de IVDMD (62.45%) fueron obtenidos con tres semanas de crecimiento y declinó en 10.35 unidades de digestibilidad entre 3 y 9 semanas. Las concentraciones de carbohidratos no estructurales aumentaron ligeramente a medida que se incrementó el intervalo de corte. Los valores estuvieron en un rango desde 13.5 hasta 20.1% para 3 y 9 semanas, respectivamente. Este estudio indica que la calidad del pasto maralfalfa es afectada negativamente a medida que avanza la madurez de la planta lo cual puede ser debido a incrementos en la acumulación de material muerto en el perfil de la planta y la lignificación de las paredes celulares. Esto sugiere que el pasto maralfalfa debe ser cosechado alrededor de las seis semanas de crecimiento de manera de optimizar su valor nutritivo. Maralfalfa grass (Pennisetum purpureum x Pennisetum glaucum) is a high quality tropical grass which has potential as forage for ruminants but questions remain about quality response to defoliation management. A plot study undertaken on the tropical north west of Venezuela assessed the effect of defoliation interval on herbage quality of maralfalfa grass. The study included three de
Valor nutritivo del pasto maralfalfa (Pennisetum purpureum x Pennisetum glaucum) en condiciones de defoliación
Clavero,T; Razz,R;
Revista de la Facultad de Agronomía , 2009,
Abstract: maralfalfa grass (pennisetum purpureum x pennisetum glaucum) is a high quality tropical grass which has potential as forage for ruminants but questions remain about quality response to defoliation management. a plot study undertaken on the tropical north west of venezuela assessed the effect of defoliation interval on herbage quality of maralfalfa grass. the study included three defoliation frequencies (3, 6 and 9 weeks). treatments were replicated three times in a randomized block design. measurements included total nitrogen (tn), soluble nitrogen as % of total nitrogen (sn/tn), in vitro dry matter digestibility (ivdmd), cell wall content (cwc), lignin (l) and total non-structural carbohydrates (tnc). data were subjected to analysis of variance, using general linear models procedures of sas statistical package. treatments means were contrasted using tukey test. nutritive quality of maralfalfa grass declined from three to nine weeks of growth. at each interval tn, cp content declined significantly (p<0.05). ns/nt declined slowly from 3 to 9 weeks, however, in all treatments, over 50% of n was soluble. cwc and l only increased significantly (p <0.05) between six and nine weeks. the highest value of ivdmd (62.45%) was obtained on three weeks of growth and declined on 10.35 digestible units from 3 to 9 weeks. tnc concentrations increased linearly as defoliation interval increased. values for tnc concentrations ranged from 13.5 to 20.1 % for 3 and 9 weeks, respectively. this study showed that the quality of maralfalfa grass becomes less favorable with advanced maturity, this could be due to increased and accumulation of dead tissue and the lignification of the cell walls. it is suggested that maralfalfa grass be harvested at about sis weeks of growth to optimize nutritive value.
Milheto (Pennisetum glaucum (L.) R.Br.) como substituto do milho em ra??es para codornas-japonesas em postura (Coturnix coturnix japonica)
Leandro, N.S.M.;Stringhini, J.H.;Café, M.B.;Fran?a, A.F.S.;Freitas, S.A.;
Arquivo Brasileiro de Medicina Veterinária e Zootecnia , 1999, DOI: 10.1590/S0102-09351999000200010
Abstract: the production performance of japanese quails receiving increasing levels of pearl millet grain in rations was studied. two hundred, 70-day-old quails submitted to a completely randomized design with five treatments and four replicates with ten birds each, were fed with 0, 25, 50, 75 and 100% of pearl millet grain in laying rations. the production and weight of eggs and the feed intake, the mortality rate and yolk color by the use of colorimetric fan were measured, and the feed conversion per dozen eggs and in relation to egg mass were calculated. the results indicated that the production performance of laying quails was not affected by the use of increasing levels of pearl millet grain and that pearl millet is a good corn substitute for japanese quail, but a yolk pigment should be used in the ration.
Rendimento forrageiro e composi??o bromatológica de variedades de milheto (Pennisetum glaucum (L.) R. BR.)
Kollet, José Luiz;Diogo, José Mauro da Silva;Leite, Gilberto Gon?alves;
Revista Brasileira de Zootecnia , 2006, DOI: 10.1590/S1516-35982006000500008
Abstract: the objective of this experiment was to evaluate the productivity, tillering, leaf blade/stem ratio and chemical composition (cp, ndf and adf) of three pearl millet (pennisetum glaucum (l.) r. br.) varieties (african, american and bn-2) submitted to three different cutting ages (35, 42 and 49 days). during the first growth period, a split-plot arrangement in a complete randomized block design was used with varieties being the main plots and cutting ages the subplots. during regrowth, a complete randomized design was used. in both cases, there were four replications per treatment. dry matter yield among varieties was similar (4,360, 4,204, and 3,247 kg/dm/ha) for the varieties african, american and bn-2, respectively. the cp (15.36, 16.71, and 16.3%), ndf (60.55, 56.29, and 55.93%) and adf (34.55, 30.04, and 30.98%) concentrations as well as the leaf blade/stem percentages differed among african, american and bn-2 varieties, respectively. dry matter productivity, ndf, and adf concentrations increased with the advance of cutting age while leaf blade/stem ratio and cp decreased linearly. productivity was reduced during regrowth, however, the average cp (19.75, 20.21, and 20.43%), ndf (52.45, 53.19, and 53.42%) and adf (27.44, 26.72, and 27.06%) concentrations did not differ among african, american and bn-2 varieties during this period, respectively. the leaf blade/stem ratio, however, differed among them during regrowth. forage nutritive value at regrowth was greater than during first growth period. american and bn-2 varieties presented the highest leaf blade percentage while the african variety showed the highest stem percentage. thus, the best forage varieties are american and bn-2 and the best cutting age is 49 days.
Diferentes Níveis de Gr o de Milheto (Pennisetum glaucum (L.) R. Brown) na Alimenta o de Suínos  [cached]
Bastos Alexandre Orio,Landell Filho Luiz de Carvalho,Passipieri Milton,Bastos Jo?o Francisco Pereira
Revista Brasileira de Zootecnia , 2002,
Abstract: Foi desenvolvido um experimento com a finalidade de determinar a viabilidade da inclus o do milheto (Pennisetum glaucum (L.) R. Brown) em ra es de suínos em fases de crescimento e termina o, observando seu efeito sobre o consumo diário de ra o, ganho diário de peso e convers o alimentar. Foi observado também o efeito da adi o de milheto sobre as características de carca a, sendo utilizados 60 leit es machos, híbridos de linhagem comercial, com peso médio inicial de 22,7 kg. Os tratamentos foram 0, 15, 30, 45 e 60% de inclus o de milheto nas ra es de suínos. O delineamento utilizado foi o inteiramente casualizado, com cinco tratamentos e seis repeti es, sendo utilizados dois animais por unidade experimental. Utilizou-se, ainda, os desdobramentos dos graus de liberdade de tratamentos, para a realiza o da regress o polinomial. N o houve efeito dos níveis de inclus o de milheto sobre o desempenho, nas fases de crescimento e termina o, nem sobre as características de carca a. Concluiu-se que a adi o de milheto em ra es de suínos é viável. Considerando-se os pre os dos ingredientes durante este experimento, a adi o de 45% de milheto mostrou-se mais eficiente economicamente.
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