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Search Results: 1 - 10 of 1033 matches for " dwarf elephant grass "
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Uso de descritores morfológicos e herdabilidade de caracteres em clones de capim-elefante de porte baixo
Silva, Sharlyton Harysson Barbosa da;Santos, Mércia Virginia Ferreira dos;Lira, Mario de Andrade;Dubeux Junior, José Carlos Batista;Freitas, Erinaldo Viana de;Ferreira, Rinaldo Luiz Caraciolo;
Revista Brasileira de Zootecnia , 2009, DOI: 10.1590/S1516-35982009000800008
Abstract: the experiment was carried out with the objectives to evaluate the use of morphologic descriptor in the characterization and selection of dwarf elephant grass genotypes, and to evaluate the heritability of the evaluated traits. nine dwarf elephant grass clones were used (taiwan a.146 - 2.14, taiwan a.146 - 2.27, taiwan a.146 - 2.37, taiwan a.146 - 2.114, merker méxico - 6.2, merker méxico - 6.5, merker méxico - 6.31, cv. mott, and cnpgl92f198.7) was allotted to a randomized complete block design was used with three replications. the morphologic descriptors were applied every 60 days after the staging cut. a total of five cuts were performed at 60-day intervals using a height of 10 cm from ground level. among the evaluated dwarf elephant grass clones the tallest ones were more desirable, and this trait should be considered at the moment of selection. heritability estimate was high for all evaluated traits of dwarf elephant grass, varying from 66% for sheath wax to 100% for mid-rib color. the taiwan a.146 - 2.37 clone was similar to the mott cultivar. heritability values showed genetic variability among clones, detected at 60 days regrowth. some of the used morphologic descriptors allowed characterization of the evaluated genotypes. the clones taiwan a. 146-2.27, taiwan a. 146-2.37, taiwan a. 146-2.114, and merker méxico 6.31 were the tallest and showed greater total tillering intensity, and were more desirable, presenting greater potential for use under cutting.
Extracción y precipitación de las proteínas solubles del pasto elefante enano (Pennisetum purpureum Schum cv. Mott)
Urribarrí C., A,L; Ferrer,O; Colina,A;
Revista de la Facultad de Agronomía , 2004,
Abstract: the main objective of the present study was to set extraction and precipitation conditions for the soluble proteins of the leaves of dwarf elephant grass in order to obtain a protein concentrate suitable as a feed for simple-gutted animals. an alkaline solution was used as extracting agent at two solid liquid ratios (1:10 y 1:15), different ph conditions (between 10 and 12.60), temperatures (between 30 and 90°c) and times (between 5 and 30 min), applied to 5 g (dry weight) of grass. the extracted true protein was determined by lowry's method. precipitation conditions were evaluated at ph 4 and 4.5 and temperatures of 50, 65 and 80 °c. extraction of protein was not affected by time (p>.05), decreased with increasing temperature (p<.05), and increased with increasing ph (p<.05). the greatest yield of extraction, 11.7%, was obtained at ph 12.60, 30°c and a solid liquid ratio of 1:15 for 5 min. the highest precipitation yield, 62.51%, was obtained at 50°c and ph 4. the concentrate had a protein content of 27.93% and the protein turned out to be limiting in phenyl alanine and methionine for swine and poultry.
Rotational Grazing System for Beef Cows on Dwarf Elephantgrass Pasture for Two Years after Establishment
M Mukhtar,Y Ishii
Journal of Animal Production , 2011,
Abstract: An intensive rotational grazing system for dwarf and late heading (DL) elephant grass (Pennisetum purpureum Schumach) pasture was examined in a summer period for two years following establishment. Four 0.05 of DL elephant grass pastures (20×25 m) were established on May 2003. They were rotationally grazed for 1 week, followed by a 3-week rest period by three breeding or raising beef cattle for three and six cycles during the first and second years of establishment respectively. Before grazing, the plant height, leaf area index and the ratio of leaf blade to stem were at the highest, while tiller number increased and herbage mass tended to increase, except for the first grazing cycle both two years and for one paddock in the second year. Herbage consumption, the rate of herbage consumption and dry matter intake tended to decrease in three paddocks from the first to the third cycle in the first year, but increase as grazing occurred in the second year. Dry matter intake averaged 10.2-14.5 and 15.4–23.2 g DM/kg/live weight (LW)/day over the four paddocks in the first and second year, respectively, and average daily gains were 0.09 and 0.35 kg/head/day in the first and second year respectively. The carrying capacities were estimated at 1,016 and 208 cow-days (CD)/ha (annual total 1,224 CD/ha) in the first year and 1,355 and 207 CD/ha (annual total 1,562 CD/ha) in the second year. Thus, DL elephant grass pasture can expand the grazing period for beef cows for the following two-year establishment. (Animal Production 13(1):10-17 (2011) Key Words: dwarf elephant grass, herbage mass, plant characters, rotational grazing
Repetibilidade e respostas de características morfofisiológicas e produtivas de capim-elefante de porte baixo sob pastejo
Viana, Bruno Leal;Mello, Alexandre Carneiro Le?o de;Lira, Mário de Andrade;Dubeux Júnior, José Carlos Batista;Santos, Mércia Virgínia Ferreira dos;Cunha, Márcio Vieira da;Ferreira, Geane Dias Gon?alves;
Pesquisa Agropecuária Brasileira , 2009, DOI: 10.1590/S0100-204X2009001200024
Abstract: the objective of this study was to estimate the coefficients of repeatability and determination (r2) and the minimum number of measurements necessary to predict the real value of morphophysiological and yield variables, as well as the responses to sheep-grazing of dwarf elephant grass pasture. the experiment was carried out in a randomized block design with five treatments - taiwan a-146 2.27, taiwan a-146 2.37, taiwan a-146 2.114, merker méxico mx 6.31 and mott - and four replicates, over five grazing cycles, between september 2008 and april 2009. mean sward height, leaf area index (lai), light interception (li), mean leaf angles (mla), silage accumulation (sa) and silage accumulation rate (sar) were evaluated. for the variables lai, il and mean sward height of plants, in long cycles, only one measurement was necessary (r2 = 80%) to place them among the most predictable characteristics in the evaluation of elephant grass clones. assessments for sa and sar need longer experimental periods for greater reliability in the estimation of response variables. in dwarf elephant grass, light interception increases with sward height and lai.
EFFECT OF MOLASSES AND CORN AS SILAGE ADDITIVES ON THE CHARACTERISTICS OF MOTT DWARF ELEPHANT GRASS SILAGE AT DIFFERENT FERMENTATION PERIODS
M. QAMAR BILAL
Pakistan Veterinary Journal , 2009,
Abstract: The aim of the present study was to determine the best stage of cut and to enhance the quality of mott grass silage by the addition of additives. For this purpose, mott grass was obtained at 45 and 60 days of its re-growth, chopped with an average particle length of inches and filled in plastic boxes by mixing two additives (molasses and corn), @ 0, 1, 3 and 5% of the forage dry matter (DM), with three replicates each. In this way, 72 silos for each stage of cut were prepared and kept at room temperature. Three silos of each treatment were opened at each fermentation period (30, 35 and 40 days) for determination of pH and lactic acid contents. The results indicated that mott grass cut at 45 days of its regrowth was the best to harvest maximum nutrients. The addition of molasses @ 3% was found to be the best at 35 days fermentation period. The pH decreased and lactic acid increased with level of additives and fermentation periods. Dry matter and crude protein contents increased to some extent. However, silage without additives showed the highest pH and low lactic acid, indicating the poor quality silage. Similarly, a loss in DM and crude protein was observed in mott grass ensiled without additives. It was concluded that the use of additives such as molasses @ 3% fodder DM is imperative to make quality mott grass silage.
Extracción y precipitación de las proteínas solubles del pasto elefante enano (Pennisetum purpureum Schum cv. Mott) Extraction and precipitation of the soluble proteins of dwarf elephant grass (Pennisetum purpureum Schum cv. Mott)
L Urribarrí C., A,O Ferrer,A Colina
Revista de la Facultad de Agronomía , 2004,
Abstract: Este estudio tiene como principal objetivo establecer las condiciones de extracción y precipitación de las proteínas solubles de las hojas del pasto elefante enano, para obtener un concentrado proteico adecuado para la alimentación de animales de estómago simple. Se utilizó como agente extractante una solución alcalina, a dos relaciones sólido - líquido (1:10 y 1:15), diferentes condiciones de pH (entre 10 y 12,60), temperatura (entre 30 y 90°C) y tiempo (entre 5 y 30 min), aplicadas a 5 g (b.s) de pasto. La proteína verdadera extraída se determinó por el método de Lowry. Las condiciones de precipitación se evaluaron a pH 4 y 4,5 y temperaturas de 50, 65 y 80 °C. La cantidad de proteína extraída no se afectó (P>0,05) al aumentar el tiempo de extracción, disminuyó al aumentar la temperatura (P<0,05) y aumentó al incrementarse el pH (P<0,05). El mayor rendimiento de extracción, 11,7%, se obtuvo a pH 12,6, 30°C y relación sólido líquido de 1:15 por 5 min. El máximo rendimiento de precipitación, 62,51%, se obtuvo a 50°C y pH 4. El concentrado tuvo un contenido proteico de 27,93% y la proteína resultó limitante en fenil alanina y metionina para cerdos y aves. The main objective of the present study was to set extraction and precipitation conditions for the soluble proteins of the leaves of dwarf elephant grass in order to obtain a protein concentrate suitable as a feed for simple-gutted animals. An alkaline solution was used as extracting agent at two solid liquid ratios (1:10 y 1:15), different pH conditions (between 10 and 12.60), temperatures (between 30 and 90°C) and times (between 5 and 30 min), applied to 5 g (dry weight) of grass. The extracted true protein was determined by Lowry's method. Precipitation conditions were evaluated at pH 4 and 4.5 and temperatures of 50, 65 and 80 °C. Extraction of protein was not affected by time (P>.05), decreased with increasing temperature (P<.05), and increased with increasing pH (P<.05). The greatest yield of extraction, 11.7%, was obtained at pH 12.60, 30°C and a solid liquid ratio of 1:15 for 5 min. The highest precipitation yield, 62.51%, was obtained at 50°C and pH 4. The concentrate had a protein content of 27.93% and the protein turned out to be limiting in phenyl alanine and methionine for swine and poultry.
Consumo e digestibilidade de silagens de capim-elefante com diferentes níveis de subproduto da agroindústria da acerola
Ferreira, Ana Cristina Holanda;Neiva, José Neuman Miranda;Rodriguez, Norberto Mario;Lopes, Fernando César Ferraz;L?bo, Raimundo Nonato Braga;
Revista Ciência Agron?mica , 2010, DOI: 10.1590/S1806-66902010000400025
Abstract: the present study aimed to determine de nutritional value of mixed elephant grass silages and increasing levels of dehydrated acerola industry by-product (pac). five pac levels (0; 3.5; 7.0; 10.5 and 14%) were evaluated in a digestibility trial with 20 male non-castrated sheep in a randomized experimental design of five treatments (pac levels) and four replications per treatment (sheep). intake and digestibility of dry matter (dm), crude protein (cp), neutral detergent fiber (ndf), acid detergent fiber (adf), cellulose (cel), hemicelulose (hcel) and energy digestible as well as nitrogen balance were determined. the addition of pac, didn't influence the consumption of dm, ndf, adf, ddm and dndf. however, the addition of 1% pac in the silage of elephant grass resulted in increase of 1.91 g and 0.04 g in the daily consumptions of cp and dcp, respectively. with the addition of pac, there were no alterations in the digestibility of dm (43%), cp (36.4%), ndf (44.8%) and in nitrogen balance (0.22 g) of the silages. however, nitrogen balance reached positive values when 10.5 and 14% of pac were added to the silage. the by-product of dehydrated acerola may be added in levels of up to 14% of the natural matter in the silage of elephant grass, because it doesn't affect the intake and digestibility of the nutrients by sheep.
Effect of Indoor and Underground Storage on Efficient Vegetative Propagation of Dwarf Napier Grass (Pennisetum purpureum Schumach)  [PDF]
Yusuke Iki, Yasuyuki Ishii, Satoru Fukagawa, Sachiko Idota
American Journal of Plant Sciences (AJPS) , 2016, DOI: 10.4236/ajps.2016.78112
Abstract: Dwarf, late-heading (DL) Napier grass is suitable for both cut-and-carry and grazing management due to sufficient yield and quality potential. This species can hardly produce viable seed, and thus vegetative propagation should be essential before winter in temperate regions of southern Kyushu. The objective of this study was to determine the efficient storage methods of DL vegetative propagation. Two experiments were carried out, the first focused on indoor storage of 10-node stem sections under room or chilling (10°C) conditions and the second, on underground storage of ten-node and one-node stem sections at 10 cm, 25 cm or 40 cm depth. After both storages, both of ten-node stem sections, cut into single nodes, and one-node stem sections were transplanted into the soil and counted for the emergence every month in 3 months of planting. In indoor-storage, while storage temperature hardly affected the emergence (P > 0.05), storage period significantly reduced the emergence percentage. In underground storage, while one-node storage achieved constantly 60% emergence, ten-node storage achieved a higher emergence at 80% under 25-cm and 40-cm depths. The results of the study suggest that underground storage of longer stem sections at 25 cm depth could be applied to practical vegetative propagation in the region.
Glyphosate e nitrgênio no controle de Brachiaria decumbens Stapf em capineiras estabelecidas
Abreu, Joadil Gon?alves de;Evangelista, Ant?nio Ricardo;Souza, Itamar Ferreira de;Rocha, Gudesteu Porto;Soares, Lécio Queiroz;Santarosa, Leonardo de Castro;
Ciência e Agrotecnologia , 2006, DOI: 10.1590/S1413-70542006000500023
Abstract: the objective of this experiment was to evaluate the efficiency of the use of the herbicide glyphosate associated with nitrogen fertilization in the control of brachiaria decumbens stapf in elephant grass stocking piles. the experimental design used was a randomized blocks with 17 treatments and three replications. the treatments were arranged in 4x4+1 factorial scheme, namely four doses of glyphosate (0, 720, 1440 e 2160 g/ha/application), four doses of nitrogen (0, 75, 150 e 225 kg/ha/ano) and one additional treatment (control with a hoeing). the application of the nitrogen and glyphosate, in the respective doses were performed immediately after the cutting of elephant grass. the association between glyphosate (2160 g/ha/application) and nitrogen (225 kg/ha/ano) was efficient in the control brachiaria grass in established elephant grass stocking piles. the application of the glyphosate (2160 g/ha/application) reduced the size of the bank of brachiaria grass seeds in the soil in 64%.
Fixa??o biológica de nitrogênio em pastagens com diferentes intensidades de corte
Silva,L.L.G.G.; Alves,G.C.; Ribeiro,J.R.A.; Urquiaga,S.; Souto,S.M.; Figueiredo,M.V.B.; Burity,H.A.;
Archivos de Zootecnia , 2010, DOI: 10.4321/S0004-05922010000100003
Abstract: the correct management of pastures and the use of biological nitrogen fixation (bnf) therein should be sustainable. as part of an investigation into how best to use bnf in pastures three experiments were performed at the experimental station of empresa pernambucana de pesquisa agropecuária, itambé, pernambuco. these experiments evaluated the production of dry matter and n accumulation and bnf under various cutting regimes. a random experimental design with 5 replications was used. for brachiaria decumbens and b. humidicola the treatments consisted of cutting intensities of 5, 15 and 25 cm, and 25 cm + 80 kg n ha-1 , and for pennisetum purpureum cutting intensities 5, 25 and 50 cm and 50 cm + 80 kg n ha-1 . the periods in which the pastures were evaluated were the transition of the dry/wet season and the wet season of 2001. accumulation of n via bnf was estimated by the natural abundance (δ15n) method. drastic cutting (5 cm) in the dry/wet season transition resulted in high accumulation of dry matter and n in b. decumbens, but there was no effect of cutting intensity on bnf by any of the grasses in either of the seasons. the conclusion is that the bnf contribution varied with season, and that high cutting did not have any influence on n accumulation, thus confirming that the three pasture grasses are tolerant to drastic cutting.
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