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Search Results: 1 - 10 of 11703 matches for " Botrel Milton Andrade "
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Efeitos de doses de nitrogênio na produ??o de leite de vacas em pastagem de coast-cross
Alvim, Maurilio José;Botrel, Milton de Andrade;
Pesquisa Agropecuária Brasileira , 2001, DOI: 10.1590/S0100-204X2001000300024
Abstract: the purpose of this work was to evaluate the effects of three levels of nitrogen (n), 100, 250 and 400 kg/ha/year, applied in coast-cross (cynodon dactylon (l.) pers.) pasture on the milk production of holstein cows during two lactation periods. the pasture was irrigated in dry season and used by rotational grazing. the experimental design was in randomized blocks, in split plots (plot = level of n; split plot = period of lactation), with two pasture replications and eight cows per treatment. the crude protein contents were similar (p>0.05) in the treatments. the stoking rates of pasture was lowest (p<0.05) in the lowest level of n. the milk production per day and per animal were similar (p<0.05) in the treatments. the milk productions per area were higher (p<0.05) in two highest levels of n. the milk production per kg of n applied was highest in the level of 100 kg/ha/year.
Efeitos de doses de nitrogênio na produ o de leite de vacas em pastagem de coast-cross
Alvim Maurilio José,Botrel Milton de Andrade
Pesquisa Agropecuária Brasileira , 2001,
Abstract: O objetivo do trabalho consistiu em avaliar os efeitos de três doses de nitrogênio (N), 100, 250 e 400 kg/ha/ano, aplicadas em pastagem de coast-cross (Cynodon dactylon (L.) Pers.) sobre a produ o de leite em duas lacta es de vacas da ra a Holandesa. A pastagem foi irrigada na seca e manejada sob pastejo rotativo. O delineamento experimental foi o de blocos ao acaso, em parcelas subdividas (nas parcelas, doses de N; nas subparcelas, fases da lacta o), com oito animais por tratamento e duas repeti es de área. Os teores de proteína bruta do pasto foram semelhantes (P>0,05) entre os tratamentos. A taxa de lota o da pastagem foi inferior (P<0,05) na menor dose de N. N o foi observada diferen a (P>0,05) na produ o diária de leite por animal. As produ es de leite por área foram mais elevadas (P<0,05) nas duas maiores doses de N. A aplica o de 100 kg/ha/ano de N foi a que proporcionou maior quantidade de leite por quilograma de N.
Avalia??o de gramíneas forrageiras na regi?o sul de Minas Gerais
Botrel, Milton de Andrade;Alvim, Maurílio José;Xavier, Deise Ferreira;
Pesquisa Agropecuária Brasileira , 1999, DOI: 10.1590/S0100-204X1999000400021
Abstract: experiments were undertaken in the south region of minas gerais state, brazil, to evaluate the yield potential of forage grasses. in experiment 1, the following species, considered as having low nutritional requirements, were evaluated: andropogon gayanus, kunt; brachiaria brizantha, stapf; brachiaria decumbens, stapf; brachiaria ruziziensis, germain evrard; brachiaria humidicola (rendle) schweickt and melinis minutiflora, beauv. in experiment 2, the species considered as having medium and high nutritional requirements, that is: setaria sphacelata (schum.); hemarthria altissima, (poir.) stapf; chloris gayana, kunt; cynodon nlemfuensis, vanderyst var. nlemfuensis; hyparrhenia rufa, (ness) and the cultivars panicum maximum, jacq.: tobiat?, green panic and makueni were evaluated. the experimental design used was randomized blocks with three replications. rates of lime and of fertilizers for both establishment and maintenance differed between experiments. each grass was evaluated for the following atributes: forage yield and crude protein content in the dry and wet season and ground cover. in experiment 1, the grasses with outstanding performance were b. brizantha, b.decumbens and a. gayanus, while in experiment 2 the species having the highest forage yield potential were: s. sphacelata, p. maximum cv. tobiat?.
Cultivares de alfafa em área de influência da Mata Atlantica no Estado de Minas Gerais
Botrel, Milton de Andrade;Ferreira, Reinaldo de Paula;Alvim, Maurílio José;Xavier, Deise Ferreira;
Pesquisa Agropecuária Brasileira , 2001, DOI: 10.1590/S0100-204X2001001100015
Abstract: the aim of this work was to evaluate the yields of alfalfa (medicago sativa l.) cultivars for the region under influence of the atlantic forest in minas gerais, brazil. thirty cultivars were evaluated in a randomized block design with three replications. before planting, seeds were inoculated with rhizobium melilotii br 7407. during the dry and rainy season, significant differences were observed among cultivars for forage production, leaf:stem ratio, and insect and disease resistance. regarding the crude protein content in the forage, significant differences were observed among cultivars only during the rainy season. crioula, p30, monarca and florida 77 cultivars had the best performance for the majority of evaluated parameters. high forage production during rainy and dry seasons was obtained with crioula cultivar, which should be recommended as the cultivar to be grown for forage crop in the region of this study.
Avalia??o de cultivares de alfafa e estimativas de repetibilidade de caracteres forrageiros
Ferreira, Reinaldo de Paula;Botrel, Milton de Andrade;Pereira, Antonio Vander;Cruz, Cosme Dami?o;
Pesquisa Agropecuária Brasileira , 1999, DOI: 10.1590/S0100-204X1999000600010
Abstract: the objective of this study was to evaluate the performance of 42 cultivars of alfalfa (medicago sativa l.) and to estimate the repeatability coefficient for dry matter production, leaf and stem protein content and disease tolerance features during the dry (april to september) and rainy (october to march) seasons with six cuts. dry matter yield and leaf protein content presented significant variation in both seasons, although stem protein content and tolerance to diseases were different only during the dry season. cultivars crioula and cibola had the best performance in most features. in general, the repeatability coefficient showed a low magnitude estimate (below 0,40). regarding dry matter production, the cultivars showed similar behavior in both seasons, with repeatability coefficient ranging from 0.3195 to 0.4270, genotypic determination around 65% and the possibility to predict the real value after seven to nine cuts.
Resposta do tifton 68 a doses de nitrogênio e a intervalos de cortes
ALVIM, MAURILIO JOSé;XAVIER, DEISE FERREIRA;VERNEQUE, RUI DA SILVA;BOTREL, MILTON DE ANDRADE;
Pesquisa Agropecuária Brasileira , 2000, DOI: 10.1590/S0100-204X2000000900021
Abstract: this work was carried out at the embrapa-centro nacional de pesquisa de gado de leite, located at coronel pacheco, mg, brazil, from october, 1995, to october, 1997, to evaluate the effects of five n doses (0, 100, 200, 400 and 600 kg/ha/year) and three cutting intervals (2, 4 and 6 weeks, during the rainy season, and four, six and eight weeks, during the dry season) in dry matter production and crude protein content on tifton 68. data were analyzed as randomized blocks design in split-plot, with three replicates. the annual dry matter yield increased up to the dose of 400 kg/ha/year of n fertilization and an up to six weeks cutting interval, during the rainy season, and eight weeks cutting interval, during the dry season. the highest production of dry matter was 20.8 tons/ha/year, with 14.3 tons/ha being obtained in the rainy season. the lower production was 3.9 tons/ha/year, with 2.8 tons/ha being obtained in the rainy season. crude protein content increased with higher nitrogen doses, both in the rainy as well as in the dry season, and with the reduction in cutting intervals. the highest level of crude protein obtained was 20.3%, and the lower was 5.2%.
Potencial forrageiro de gramíneas em condi??es de baixas temperaturas e altitude elevada
Botrel, Milton de Andrade;Alvim, Maurílio José;Ferreira, Reinaldo de Paula;Xavier, Deise Ferreira;
Pesquisa Agropecuária Brasileira , 2002, DOI: 10.1590/S0100-204X2002000300021
Abstract: the experiment was conducted at santo ant?nio do pinhal county on a hilly area of serra da mantiqueira located in the paraíba valley region, in the s?o paulo state, brazil. the aim of this work was to evaluate forages grasses potential for cold tolerance and soil cover. the experimental design was a randomized block with three replications, and treatments were sixteen forages grasses sown on plots of 5 x 5 m. according to the results obtained, the hemarthria altissima and setaria anceps species showed the best attributes for monthly dry matter production, crude protein contents, vegetative soil cover and frost tolerance, so they are indicated for pasture establishment in the hilly area of serra da mantiqueira of the paraíba river valley.
Resposta do tifton 85 a doses de nitrogênio e intervalos de cortes
Alvim, Maurilio José;Xavier, Deise Ferreira;Verneque, Rui da Silva;Botrel, Milton de Andrade;
Pesquisa Agropecuária Brasileira , 1999, DOI: 10.1590/S0100-204X1999001200022
Abstract: this experiment was carried out at embrapa-centro nacional de pesquisa de gado de leite, located in juiz de fora, mg, brazil, from october, 1995 to october, 1997, to evaluate the effects of five n doses (0, 100, 200, 400 and 600 kg/ha/year) and three cutting intervals (two, four and six weeks, during the rainy season, and four, six and eight weeks, during the dry season) on dry matter production and crude protein content of tifton 85. data were analyzed as randomized blocks design in split-plot, with three replicates. the annual dry matter yield increased up to the highest dose of 600 kg/ha/year of n fertilization and up to four weeks cutting interval, during rainy season, and six-week cutting intervals, during the dry season. the highest production of dry matter was 23.1 ton/ha/year, of which 17.8 ton/ha were obtained in the rainy season. the lowest production was 2.6 ton/ha/year, of which 1.9 ton/ha were obtained in the rainy season. crude protein content varied inversely with cutting intervals and as the amount of n fertilization increased up to dose of 600 kg/ha/year. the crude protein contents did not differ significantly with cutting intervals during the raining season. the highest level of crude protein obtained was 21.7%. tifton 85 persistency was hampered in the absence of n fertilization and the shortest cutting interval.
Avalia??o sob pastejo do potencial forrageiro de gramíneas do gênero Cynodon, sob dois níveis de nitrogênio e potássio
Alvim, Maurilio José;Botrel, Milton de Andrade;Rezende, Humberto;Xavier, Deise Ferreira;
Revista Brasileira de Zootecnia , 2003, DOI: 10.1590/S1516-35982003000100006
Abstract: the study was undertaken in coronel pacheco - mg (national dairy cattle reserch center of the brazilian agricultural corporation - embrapa), to evaluate, under grazing conditions, the cynodon nlenfuensis, vanderyst and three cultivars of cynodon dactylon, l. pers. (florona, florakirk, florico), fertilized with either 250:200 or 500:400 kg/ha/year of n:k2o. the experimental design was a randomized blocks, in split-plot, and three replications. no significant difference on dry matter yield between the two rates of n/k2o were found. in both n:k2o rates, florakirk cultivar presented the highest annual dry matter yield, however, in the dry season it showed a low yield level. the florico was the cultivar with the lowest dry matter yield. the best and the worst forage distribution were exhibited by cultivars florona and florakirk, respectively. the cp contents in the forage was not influenced by either nitrogen rates or season, and directly related to the leaf-stem ratio. the highest cp contents were found in florakirk, while the lowest in african stargrass grass and florico cultivar. the ivdmd of forage produced during the rainy season was slightly superior to those of the dry season. the n:k2o rates did not influence ivdmd, which were higher in florakirk and florona cultivars.
Potencial forrageiro de novos clones de capim-elefante
Botrel, Milton de Andrade;Pereira, Ant?nio Vander;Freitas, Vicente de Paula;Xavier, Deise Ferreira;
Revista Brasileira de Zootecnia , 2000, DOI: 10.1590/S1516-35982000000200003
Abstract: the objective of this experiment was to evaluate the forage potential of new selected clones of elephantgrass. the evaluation was conducted at the dairy cattle research centre - embrapa, coronel pacheco, minas gerais, for two consecutive years. twenty selected clones obtained by the elephantgrass breeding program were evaluated, and two traditional cultivars cameroon and taiwan a -146 were used as control. the experimental procedure was a randomized block design with four replicates. the fertilization for both establishment and maintenance was applied according to the soil chemical analysis and elephant grass nutritional requirements. significant differences among the clones were observed regarding to forage production potential, leaf:stem ratio, and aerial and basal tillering. the majority of the evaluated new clones were superior to the traditional cultivars cameroon and taiwan a-146 with relation to dry matter production during the dry and rainy periods. crude protein content in the forage did not differ among the new clones and the control cultivars (cameroon and taiwan a-146), during both dry and rainy seasons. the clone f 27-01, released as elephant grass cultivar pioneiro, was superior for the most evaluated agronomic traits.
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