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Produ??o e qualidade do pasto de coastcross consorciado ou n?o com amendoim forrageiro com ou sem aplica??o de nitrogênio
Lenzi, A.;Cecato, U.;Machado Filho, L.C.P.;Gasparino, E.;Roma, C.F.C.;Barbero, L.M.;Lim?o, V.A.;
Arquivo Brasileiro de Medicina Veterinária e Zootecnia , 2009, DOI: 10.1590/S0102-09352009000400021
Abstract: forage accumulation rate (far), total forage production (tfp), chemical composition and in vitro dry matter digestibility (ivdmd) of coastcross pasture mixed with arachis pintoi (ap) were evaluated. treatments plots were: coastcross + a. pintoi without n (ca0); coastcross + a. pintoi with 100kg of n (ca100); coastcross with 200kg of n (c200); and coastcross + a. pintoi with 200kg of n (ca200); and seasons of the year (split-plots): winter, spring, summer, and autumn were analyzed. a randomized block design was used subdivided into time plots, with two replications. treatments with the highest fertilizer levels presented higher far than others (p<0.05), with higher tfp during the summer, followed by spring, autumn, and winter, with no differences among then. there were no differences (p>0.05) among treatments for cp, ndf, and ivdmd on coastcross leaf fractions and arachis pintoi whole plant. nitrogen fertilization, when applied to single coastcross pasture or mixed with forage peanut, increased accumulation rate and forage accumulation, with higher productivity and quality in summer.
Produ??o animal e valor nutritivo da forragem de pastagem de coastcross consorciada com amendoim forrageiro
Barbero, L.M.;Cecato, U.;Lug?o, S.M.B.;Gomes, J.A.N.;Lim?o, V.A.;Abrah?o, J.J.S.;Roma, C.F.C.;
Arquivo Brasileiro de Medicina Veterinária e Zootecnia , 2010, DOI: 10.1590/S0102-09352010000300021
Abstract: in this study, the following treatments were used: coastcross + forage peanut + 200kg/ha of n; coastcross + forage peanut + 100kg/ha of n; coastcross + 200kg/ha of n and coastcross + forage peanut (plots) in the winter, spring, summer, and autumn (subplots), designed in randomized blocks. heifers were managed under continuous stocking and variable stocking rate on pasture maintained at 17cm height. samples were collected every 28 days determining the nutritional value of forage. average daily gain (adg), weight gain (wg), stocking rate (sr), and number of animals/day (nad) were evaluated. as for forage nutritional value, the worst results were found in pasture without fertilization, 16.9% and 6.0% cp of leaf and stem, respectively, and 70.1% ndf in leaves. in the spring and summer, animals had a higher adg, 0.518 and 0.515kg/animal, than 0.396 and 0.293kg/animal in the winter and autumn, respectively. sr was higher in pastures that received higher nitrogen doses, 5.38au/ha in average; and in the summer, 6.81au/ha. lwg was higher in fertilized areas, 1,341kg lw/ha, than in not fertilized pastures, 735kg/ha.
Produ??o de forragem e componentes morfológicos em pastagem de coastcross consorciada com amendoim forrageiro
Barbero, Leandro Martins;Cecato, Ulysses;Lug?o, Simony Marta Bernardo;Gomes, José Augusto Nogueira;Lim?o, Veridiana Aparecida;Basso, Kelen Cristina;
Revista Brasileira de Zootecnia , 2009, DOI: 10.1590/S1516-35982009000500002
Abstract: this experiment was carried out from july 2006 to june 2007. it was used an experimental design of random blocks with split plot in time, with two replications using the following treatments: coastcross + peanut forage + 200 kg/ha of n; coastcross + peanut forage + 100 kg/ha of n; coastcross + 200 kg/ha of n and coastcross + peanut forage in the following seasons: winter, spring, summer and autumn. to estimate the forage mass production availability, the double sampling and triple pairing technique, respectively, every 28 days was used. the proportions of grass, legumes, weeds, uncovered soil and litter were evaluated. the material from the double sampling technique was separated into leaf blade, stem + sheath and dead material fractions. regarding of forage availability, the pasture submitted to treatment without nitrogen had the lower mass, while that submitted to 200 kg/ha of nutrient without the presence of legume had the highest forage mass. for the peanut forage mass, the pasture without fertilization presented the best result. the forage production was higher in pastures submitted to treatment with 200 kg of n/ha followed by that fertilized with 100 kg of n/ha. the grass accumulation rate followed the same trend of forage production. no difference were observed for uncovered soil, litter and uncovered area between treatments; however, the pasture submitted to the dose of 200 kg of n/ha without legume presented lower incidence of invasive plants. no differences were observed for the leaf/stem ratio, leaves mass and dead material mass between treatments; however, the grass submitted to 200 kg of n/ha without legume presented the greatest stems mass.
Production and quality of coastcross conserted forage groundnut under nitrogen fertilization and different grazing layers Produ o e qualidade da consorcia o de coastcross com amendoim forrageiro adubada com nitrogênio em diferentes estratos sob pastejo  [cached]
Ulysses Cecato,Wagner Paris,Claudio Roma,Veridiana Lim?o
Revista Brasileira de Saúde e Produ??o Animal , 2011,
Abstract: The objective was to evaluate the forage mass production and quality in the morphologic components in different layers of coastcross grass (Cynodon dactylon [L.] Pers cv Coastcross-1) in consortium with forage Groundnut (Arachis pintoi Krapovikas y Gregory cv. Amarillo) with and without N fertilization. The treatments were: coastcross + forage groundnut without N (CA0); with 100kg/ha of N (CA100); with 200 kg/ha of N (CA200); and coastcross exclusively with 200kg/ha of N per year (C200) in the spring, summer and fall. It was used a randomized block design in a split plot. The layers were from zero to 7cm above the soil, 8 to 14cm, and above 15cm. In the lower layers there was higher total forage mass production. For the grass fractions there was no difference in the lower and higher layers however it was observed highter mass production with highest levels of fertilization. The senescent material was higher in fall. The intermediate layer showed superior values in the spring and fall compared to summer as a result of grazing in this layer be constituted of highest percentage of culms witch presented highest quality. The quality values were higher in treatments with nitrogen fertilization. Objetivou-se avaliar a massa de forragem e qualidade bromatológica dos componentes morfológicos nos diferentes estratos do pasto de coastcross (Cynodon dactylon [L.] Pers cv Coastcross-1) em consorcio com amendoim forrageiro (Arachis pintoi Krapovikas y Gregory cv Amarillo) com e sem utiliza o de N. Os tratamentos foram: coastcross + amendoim forrageiro sem nitrogênio (CA0); com 100kg/ha de N (CA100); com 200kg/ha de N (CA200) e coastcross exclusiva com 200kg/ha de N por ano (C200) na primavera, ver o e outono. Utilizou-se um delineamento em blocos casualizados em esquema de parcelas subdivididas. Os estratos foram de zero a 7cm a partir do solo, de 8 a 14cm e acima de 15cm. Nos estratos inferiores verificou-se maior MF. Para as fra es da gramínea n o houve diferen as nos estratos mais baixos e altos, porém nos tratamentos com maiores níveis de aduba o a massa de forragem foi superior. O material senescente foi superior no outono. O estrato intermediário apresentou valores superiores na primavera e outono comparados ao ver o, consequência do pastejo deste estrato estar constituído de maior percentagem de colmos. O valor nutritivo foi superior nos tratamentos que receberam aduba o nitrogenada.
FORAGE MASS ON CULTIVATED PASTURES AND CONSORTED WITH LEGUMES, ESTABILISHED WITH AND WITHOUT BURNING OF SECONDARY VEGETATION MASSA DE FORRAGEM EM PASTAGENS CULTIVADAS E CONSORCIADAS COM LEGUMINOSAS, ESTABELECIDAS COM E SEM QUEIMA DA VEGETA O SECUNDáRIA  [cached]
Andréa Krystina Vinente Guimar?es,Ari Pinheiro Camar?o,Paulo Celso Santiago Bittencourt,José Adérito Rodrigues Filho
Ciência Animal Brasileira , 2009,
Abstract: It was evaluate the mass of forage on pasture of B. brizantha and B. humidicola grass, with the association of legums Arachis pintoi , Cratylia argentea and Leucaena leucocephala with and without burning. Three pastures were tested for each experiment: 1. QB - B. humidicola + B. brizantha cv. Marandu. 2. QBAL - B. humidicola + B. brizantha + A. pintoi cv. Amarilo + L. leucocephala cv. Cunninghan . 3. QBAC - B. humidicola + B. brizantha + A. pintoi cv. Amarilo + C. argentea. The experiments took place from April 15th of 2002 to the 18th of March of 2003. The samples, in the plots of grasses in six places, while in the consorted, twelve places. There were seasonal differences in the total mass, marandu grasses leaf mass, of Arachis pintoi, species of capoeira and dead material. As to the methodology of area preparation, all the response variables were differents. The total mass, leaf and stem of B. brizantha and dead material were greater in the pasture of grasses (QB). The mass of leaf and stem of B. humidicola and Arachis pintoi were greater in the pasture of QBAL and the mass of capoeiras species was greater in the pasture of QBAC. KEY WORDS: B. humidicola, B. brizantha, Arachis pintoi, burning. Avaliou-se a massa de forragem em pastagens de capim-marandu (B. brizantha Stapf) e capim-quicuio (B. humidicola Rendle. Schweickerdt) consorciadas com as leguminosas Arachis pintoi Krapovickas e Gregory, Cratylia argentea (Desv.) o Kuntze e Leucaena leucocephala Lam. de Wit., em dois métodos de preparo de área, com e sem queima. Foram testadas três pastagens para cada experimento: 1. QB - B. humidicola (quicuio) + B. brizantha cv. Marandu. 2. QBAL - B. humidicola + B. brizantha consorciada com A. pintoi cv. Amarilo + L. leucocephala (leucena) cv. Cunninghan. 3. QBAC - B. humidicola + B. brizantha consorciada com A. pintoi cv. Amarilo + C. Argentea (Cratylia). O período experimental foi de 15 de abril de 2002 a 18 de mar o de 2003. Procedeu-se às amostragens de forragem ao acaso, nas parcelas somente com gramíneas em seis locais, nas consorciadas em doze. Houve diferen as entre épocas na massa total, de folha de braquiar o, de araquis, de espécies da capoeira, e de material morto. Quanto ao método, todas as variáveis mostraram-se diferentes (P< 0,05). As massas total, de folha e colmo de capim-marandu e de material morto foram superiores na pastagem com gramíneas (QB), enquanto que a massa de folha e colmo de capim-quicuio e de araquis, na pastagem QBAL e de espécies da capoeira, foi maior na pastagem QBAC. PALAVRAS-CHAVES: B. humidicola, B. brizantha, Arachi
Roughage digestion evaluation in horses with total feces collection and mobile nylon bags
Rodrigues, Liziana Maria;Almeida, Fernando Queiroz de;Pereira, Marcos Barreto;Miranda, Ana Cláudia Tavares;Guimar?es, Andresa;Andrade, Agnaldo Machado de;
Revista Brasileira de Zootecnia , 2012, DOI: 10.1590/S1516-35982012000200016
Abstract: this study aimed to evaluate the nutrient digestibility of roughages in horses with total feces collection and mobile bags. two trials were carried out simultaneously. the first trial evaluated the digestibility of nutrients of coastcross hay (cynodon dactylon cv. coastcross) with total feces collection. the second trial assessed the digestibility of nutrients of alfalfa hay (medicago sativa), peanut (arachis pintoi) and coastcross hay with mobile bags. this trial was conducted with gastric insertions of nylon bags every 12 hours, and each bag contained 663 mg of feed samples in a proportion of 17 mg dm/cm2. feces and bags were collected directly from the stall floor immediately after excretion. there was no difference between the digestibility of dry matter, crude protein, carbohydrates and hydrolysable carbohydrates of coastcross hay estimated with feces collection and mobile bags. forage peanut showed high nutrients digestibility, with values close to those observed with alfalfa, indicating potential for use in diets for horses.
Potencial discriminatório dos N-alcanos em plantas forrageiras tropicais por análises multivariadas
C?rtes, Cristiano;Damasceno, Júlio César;Fukumoto, Nelson Massaru;Sakaguti, Eduardo Shiguero;Santos, Geraldo Tadeu dos;Alcalde, Claudete Regina;
Revista Brasileira de Zootecnia , 2005, DOI: 10.1590/S1516-35982005000400001
Abstract: the discriminatory potential of n-alkanes in tropical grasses (brachiaria brizantha stapf. cv. marandu, cynodon dactylon pers. cv. coast-cross 1 and panicum maximum jacq. cv. tanzania 1) and legumes (arachis pintoi koprov & gregory. cv. amarillo and glycine wightii verdc.) was evaluated. the forages were sampled in spring, summer and winter, with four replications per species per season. the n-alkanes c24 to c35, using c32 and c34 as internal markers, were considered in the analyses. concentrations of n-alkanes in these species and their respective fractions (leaf blade, top and bottom portions of the stem and dead matter for grasses; leaves, top and bottom of stem and dead matter for legumes) were evaluated by multivariate analysis. the discriminatory potential of n-alkanes was determined by the canonical variables analysis. the species and their respective fractions were divided into groups by cluster analysis. n-alkanes with the smallest potential discriminatory potential were: c26, c29, c25, c27 and c28 (spring), c26, c28, c27, c30 and c29 (summer) and c28, c26, c25, c29 and c27 (winter). the n-alkanes in the spring and winter samples allowed discrimination of coast-cross leaf blade from the top and bottom stems portions of this grass and between grass and legumes. it was possible to discriminate fractions of nutritional importance of brachiaria brizantha, leaf blade and higher portion of stem in the summer. the multivariate analysis, the canonical variables and the cluster analysis are good procedures to be used in n-alkanes studies for herbivores diets discriminating.
Consumo e digestibilidade da matéria seca de fenos de braquiária decumbens e amendoim forrageiro em ovinos estimados por meio de n-alcanos
Fukumoto, Nelson Massaru;Damasceno, Julio Cesar;C?rtes, Cristiano;Paine, Rafael Cesário;Queiroz, Maria Fernanda Soares;Santos, Geraldo Tadeu dos;Matsushita, Makoto;
Revista Brasileira de Zootecnia , 2007, DOI: 10.1590/S1516-35982007000200026
Abstract: the objective of this trial was to use n-alkanes to estimate dry matter intake (dmi) and dm digestibility in sheep. it was also of particular interest to compare two methodologies of fecal collection (total collection vs. grab samples) as well as to identify which n-alkanes best estimate dmi and dm digestibility. twenty animals were assigned to a completely randomized design and were fed diets containing different proportions of forage peanut (arachis pintoi koprov & gregory cv. amarillo) and signalgrass hays [brachiaria decumbens, (stapf), webster] (0, 15, 30, 45 and 60% of forage peanut; dm basis). the experiment lasted 18 days with 10 days for diet adaptation, three days for marker administration (c32 in cellulose pellets), and five days for fecal collection. data were submitted to analysis of variance and observed and estimated means were compared by t test. fecal grab samples were collected six times daily at 4 hours intervals (9:00, 13:00, 17:00, 21:00, 01:00 and 05:00) for five consecutive days. the internal alkanes c31, c33, and c31 + c33 were used for estimating dmi while dm digestibility was estimated by c33, c35, and c33 + c35. results showed that reliable estimation of dm digestibility was obtained by using the internal alkane c33 corrected for fecal recovery. the combination of the internal alkanes c31 + c33 resulted in the best estimation of dmi with no need for fecal recovery correction. in addition, only one daily fecal grab sample (9 h or 13 h) was necessary to accurately estimate dmi.
Tiller size/population density compensation in grazed Coastcross bermudagrass swards
Sbrissia, André Fischer;Silva, Sila Carneiro da;Carvalho, Carlos Augusto Brand?o de;Carnevalli, Roberta Aparecida;Pinto, Luiz Felipe de Moura;Fagundes, Jaílson Lara;Pedreira, Carlos Guilherme Silveira;
Scientia Agricola , 2001, DOI: 10.1590/S0103-90162001000400002
Abstract: several compensatory mechanisms in pastures do not allow optimisation of responses from the processes of herbage production and utilisation. compensation due to tiller size/density relationships is one of these mechanisms. this experiment evaluated this process for coastcross bermudagrass and compared the responses to those reported for temperate forages. treatments were "steady state" sward surface heights of 5, 10, 15, and 20 cm that were maintained from august, 1998, through july, 1999 by sheep grazing. the experimental design was a randomised complete block, replicated four times. pasture responses were evaluated on four separate dates (15/12/1998, 25/01/1999, 07/04/1999 and 04/07/1999) with respect to: tiller population density, tiller weight, leaf mass and leaf area per tiller and herbage mass (biomass). tiller volume, leaf area index (lai), tiller leaf:stem ratio and tiller leaf area:volume ratio (r) were calculated. simple regression analyses between tiller population density and tiller weight were also performed. coastcross swards showed a tiller size/density compensation mechanism where high tiller population densities were associated with small tillers and vice-versa; except on the last evaluation. however, regression analysis revealed linear coefficients of -3.83 to -2.05, which are lower than the theoretical expectation of -3/2. the lower r values observed, when compared to those reported for perennial ryegrass, suggest that coastcross swards optimised their lai via clonal integration among tillers in contrast with tillers of cool-season grasses that respond more as individuals. however, this hypothesis has yet to be experimentally verified.
Tiller size/population density compensation in grazed Coastcross bermudagrass swards  [cached]
Sbrissia André Fischer,Silva Sila Carneiro da,Carvalho Carlos Augusto Brand?o de,Carnevalli Roberta Aparecida
Scientia Agricola , 2001,
Abstract: Several compensatory mechanisms in pastures do not allow optimisation of responses from the processes of herbage production and utilisation. Compensation due to tiller size/density relationships is one of these mechanisms. This experiment evaluated this process for Coastcross bermudagrass and compared the responses to those reported for temperate forages. Treatments were "steady state" sward surface heights of 5, 10, 15, and 20 cm that were maintained from August, 1998, through July, 1999 by sheep grazing. The experimental design was a randomised complete block, replicated four times. Pasture responses were evaluated on four separate dates (15/12/1998, 25/01/1999, 07/04/1999 and 04/07/1999) with respect to: tiller population density, tiller weight, leaf mass and leaf area per tiller and herbage mass (biomass). Tiller volume, leaf area index (LAI), tiller leaf:stem ratio and tiller leaf area:volume ratio (R) were calculated. Simple regression analyses between tiller population density and tiller weight were also performed. Coastcross swards showed a tiller size/density compensation mechanism where high tiller population densities were associated with small tillers and vice-versa; except on the last evaluation. However, regression analysis revealed linear coefficients of -3.83 to -2.05, which are lower than the theoretical expectation of -3/2. The lower R values observed, when compared to those reported for perennial ryegrass, suggest that Coastcross swards optimised their LAI via clonal integration among tillers in contrast with tillers of cool-season grasses that respond more as individuals. However, this hypothesis has yet to be experimentally verified.
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