Alterações na composição morfológica em função do estádio de maturação em cultivares de milho para produção de silagem

Zopollatto, Maity; Nussio, Luiz Gustavo; Mari, Lucas José; Schmidt, Patrick; Duarte, Aildson Pereira; Mourão, Gérson Barreto

doi:10.1590/s1516-35982009000300008

Cited by 22 publications

(20 citation statements)

References 8 publications

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“…On the other hand, stalks from cultivars AG 5011 (21.63%) and P 3041 (24.34%) showed dry matter levels similar to those observed by Zopollatto et al (2009), Beleze et al (2003 and Bernard et al (2004), who cut the plants at 116 and 118 days after sowing, respectively. The concentration of ash did not differ between cultivars Dina 766, Dina 1000, P 3041 and AG 5011, which had higher ash concentration in the stalk fraction (P<0.05) than the other evaluated cultivars (Table 1).…”

Section: Resultssupporting

confidence: 71%

“…Generally, these results indicate that harvest based on the milk line evaluation occurred at the proper time. According to Zopollatto et al (2009), Kennington et al (2005), and Mello et al (2005), at ensiling, stalk and kernel are the components with biggest participation, and kernels are the fraction which mostly contributes to the corn silage final quality, since it has higher IVDMD. Table 6 -Bromatological composition of the cob fraction…”

Section: Resultsmentioning

confidence: 99%

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Bromatological evaluation of eleven corn cultivars harvested at two cutting heights

et al. 2012

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-The objective of this study was to evaluate the chemical composition and dry matter in vitro digestibility of stem, leaf, straw, cob and kernel fractions of eleven corn (Zea mays) cultivars, harvested at two cutting heights. The experiment was designed as randomized blocks, with three replicates, in a 2 × 11 factorial arrangement (eleven cultivars and two cutting heights). The corn cultivars evaluated were D 766, D 657, D 1000, P 3021, P 3041, C 805, C 333, AG 5011, FOR 01, CO 9621 and BR 205, harvested at a low cutting height (5 cm above ground) and a high cutting height (5 cm below the first ear insertion). Cutting height influenced the dry matter content of the stem fraction, which was lower (23.95%) in plants harvested at the low, than in plants harvested at the high cutting height (26.28%). The kernel fraction had the highest dry matter in vitro digestibility (85.13%), while cultivars did not differ between each other. Cob and straw were the fractions with the highest level of neutral detergent fiber (80.74 and 79.77%, respectively) and the lowest level of crude protein (3.84% and 3.69%, respectively). The leaf fraction had the highest crude protein content, both for plants of low and high cuttings (15.55% and 16.20%, respectively). The increase in the plant cutting height enhanced the dry matter content and dry matter in vitro digestibility of stem fraction, but did not affect the DM content of the leaf fraction.

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Section: Resultssupporting

confidence: 71%

Section: Resultsmentioning

confidence: 99%

Bromatological evaluation of eleven corn cultivars harvested at two cutting heights

et al. 2012

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“…O número de espigas por planta é um componente importante do rendimento na produtividade do milho, sendo assim, a utilização de plantas prolíficas (com maior número de espigas por planta), poderia potencializar o rendimento de grãos por unidade de área. Além disso, a maior proporção de espigas no material a ser ensilado contribui para melhor qualidade da forragem e, portanto, da silagem, desde que não haja alta proporção de palha e sabugo, que podem reduzir o efeito da espiga na qualidade da silagem (JAREMTCHUK et al, 2005 Zopollatto et al (2009), avaliando as alterações na composição morfológica de seis híbridos de milho em função do estádio de maturação, para produção de silagem, observaram que o teor de matéria seca recomendável para ensilagem (32 a 35%), foi obtido no intervalo de 98 a 112 dias após a semeadura, fato comprovado pelos dados observados no presente experimento onde os teores de matéria seca estão adequados para ensilagem (Tabela 3) em plantas com idades que variaram de 105 a 114 dias (Tabela 2).…”

Section: Resultsunclassified

Avaliação de doze cultivares de milho (Zea mays L.) para silagem

et al. 2010

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ResumoO experimento foi realizado com o objetivo de avaliar as características agronômicas e químico-bromatológica de diferentes cultivares de milho para ensilagem. Foram avaliados doze cultivares de milho em delineamento experimental em blocos casualizados, com três blocos, 12 tratamentos e três repetições. As parcelas foram constituídas por três linhas de seis metros de comprimento e espaçamento de 0,8 m entre linhas. O ciclo das plantas, do plantio à colheita, variou de 105 a 114 dias. A altura média diferiu entre os cultivares (P < 0,05), variando de 182,6 (AGN-3150) a 247,0 cm (AG-122). Não houve diferença (P > 0,05) entre os cultivares para número de espigas por planta (0,9 a 1,1), teores de matéria seca (33,2 a 38,2 %), de extrato etéreo (1,9 a 2,5 %) e de fibra em detergente neutro (49,1 a 56,2 %). A produção de matéria seca diferiu (P < 0,05) entre o cultivar TORK (20,6 t/ha) e os cultivares CD-302 (16,4 t/ha) e TRAKTOR (15,7 t/ha). O AGN-3150 apresentou o menor teor de fibra em detergente ácido (24,2 %) e maior digestibilidade (80,7 %). Todas as cultivares apresentaram características agronômicas e qualitativas adequadas para produção de silagem, destacando-se os cultivares TORK e AGN-3150. Palavras-chave: Altura, ensilagem, espigas, matéria seca, plantas acamadas, produção AbstractThe experiment was conducted to evaluate the agronomic characteristics and chemical composition of different maize cultivars for ensiling of the plant. Twelve maize cultivar were analyzed in a completely randomized block design, with three block, twelve treatments and three replication. The plot with three lines of six meters long and spacing of 0.8 m were used in all trials. The cycle of the plants of the planting to harvest varied from 105 to 114 days. The height average differed among (P < 0.05) cultivars, and varied from 182.6 (AGN-3150) to 247.0 cm (AG-122). There was not difference among maize cultivars (P > 0.05) for ear by plant number (0.9 to 1.1), dry matter (33.2 to 38.2 %), ether extract (1.9 to 2.5 %) and neutral detergent fiber (49.1 to 56.2 %). The dry matter production differed (P < 0.05) among cultivar TORK (20.6 t/ha) and the cultivars CD-302 (16.4 t/ha) and TRAKTOR (15.7 t/ha). The AGN-3150 presented lower acid detergent fiber (24.2 %) and higher digestibility (80.7 %). All cultivars presented agronomic and qualitative characteristics for silage production, with TORK and AGN-3150 being the most outstanding.

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“…This fact explains the greater DM digestibility observed in plants cut high, in which most of the stalks was left in the field. Zopollatto et al (2009) observed that at the ensiling point, stalk and kernel are the major components in the composition of plants (34.0 to 35.6%, and 32.4 to 36.6%, respectively). In this study, as maturity stage advanced, the plants stalk fraction increased and, consequently, DM digestibility decreased.…”

Section: Resultsmentioning

confidence: 99%

Nutritional characteristics and in vitro digestibility of silages from different corn cultivars harvested at two cutting heights

Caetano

Oliveira

Júnior³

et al. 2011

R. Bras. Zootec.

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-The objective of this study was to evaluate the nutritional traits and in vitro digestibility of silages from different corn cultivars harvested at two cutting heights. It was evaluated 11 cultivars (Dina 766, Dina 657, Dina 1000, P 3021, P 3041, C 805, C 333, AG 5011, FO 01, Dina co 9621 and BR 205) harvest 5 cm above ground (low) and 5 cm below the intersection of the first ear (high). It was used a random block design (three blocks), arranged in a 11 × 2 factorial scheme.Silages from plants harvested at high cutting height presented average content of dry matter significantly superior to silages from plants harvested at low height. Cultivars FO 01, AG 5011, Dina co 9621 and Dina 766 presented greater content of crude protein than cultivars C 805, P 3041 and P 3021, which presented the lowest contents of this nutrient. The raise in the cut height increased in vitro dry matter true digestibility coefficients and in vitro dry matter digestibility of silage evaluated. The increase in cut height improved nutritive value of silages by decreasing concentrations of fibrous fractions and increasing in vitro dry matter digestibility. cm abaixo da inserção da primeira espiga (alta). O experimento foi delineado em blocos casualizados (três blocos), arranjados em esquema fatorial 11 × 2. As silagens das plantas colhidas na altura de corte alta apresentaram teor médio de matéria seca significativamente superior às silagens das plantas colhidas na altura de corte baixa. As cultivares FO 01, AG 5011, Dina co 9621 e Dina 766 apresentaram maior teor de proteína bruta, que as cultivares C 805, P 3041 e P 3021, as quais apresentaram os menores teores deste nutriente. A elevação da altura de corte aumentou os coeficientes de digestibilidade verdadeira in vitro da matéria seca e digestibilidade in vitro da matéria seca das silagens avaliadas. O aumento da altura de corte melhorou o valor nutritivo das silagens, diminuindo as concentrações das frações fibrosas e aumentando a digestibilidade in vitro da matéria seca.Palavras-chave: composição bromatológica, cultivares de milho, digestibilidade in vitro, silagem Revista Brasileira de Zootecnia

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Alterações na composição morfológica em função do estádio de maturação em cultivares de milho para produção de silagem

Cited by 22 publications

References 8 publications

Bromatological evaluation of eleven corn cultivars harvested at two cutting heights

Bromatological evaluation of eleven corn cultivars harvested at two cutting heights

Avaliação de doze cultivares de milho (Zea mays L.) para silagem

Nutritional characteristics and in vitro digestibility of silages from different corn cultivars harvested at two cutting heights

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