Caracterização da forragem e da extrusa de clones de capim elefante anão sob lotação intermitente

Pereira, Tatiana Pires; Modesto, Elisa Cristina; Campana, Ludmila Lacerda; Gomide, Carlos Augusto de Miranda; Paciulo, Domingos Sávio Campos; Nepomuceno, Delci de Deus; Carvalho, Carlos Augusto Brandão de; Morenz, Mirton José Frota; Almeida, João Carlos de Carvalho

doi:10.5433/1679-0359.2014v35n5p2635

Cited by 2 publications

(2 citation statements)

References 9 publications

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“…Stem elongation allowed spacing of the insertion point of the leaf blades, making an architectural rearrangement in order to better allow distribution of the solar radiation along the canopy profile (ALEXANDRINO et al, 2011). This was not observed in the succeeding seasons, possibly because the negative water balance prevented the LAI from reaching critical levels (PEREIRA et al, 2014). The water restriction compromises cell turgescence pressure, a mechanism that is part of the cellular expansion process; this contributed to the smallest daily increases in height in those seasons.…”

Section: Resultsmentioning

confidence: 96%

Biomass components of Pennisetum purpureum cv. Roxo managed at different growth ages and seasons

Maranhão

Cândido

Lopes

et al. 2018

Rev. bras. saúde prod. anim.

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SUMMARY This study was carried out aiming to evaluate the biomass components of elephant grass cv. Roxo at seven growth ages, during rainy, transition and dry seasons. A completely randomized design was adopted with a split plot arrangement over time. The treatments consisted of seven growth ages (9, 18, 27, 36, 45, 54 and 63) and three seasons (rainy, transition and dry). The variables green forage biomass, dead forage biomass, green stem biomass and green leaf blade biomass showed positive linear responses to age and had their magnitude influenced by the evaluated seasons. The live/dead material ratio showed a decreasing linear response as a function of age. The leaf blade/stem ratio showed a negative linear adjustment in the rainy season, reaching a critical value of 1.0 at 59 days, and it showed a quadratic adjustment in the transition season, with the maximum point at 27.53 days; however, this ratio was not influenced by age in the dry season, revealing an average value of 2.22 ± 0.27. The canopy height and leaf area index showed a positive linear response to age in the three seasons. Tiller population density showed quadratic behaviour for age, with maximum estimated values of 134 and 110 til. m-2 at 31.24 and 37.40 days in the rainy and dry seasons, respectively. Rainfall seasonality influences the magnitude of the daily increase of the distinct biomass components of Pennisetum purpureum cv. Roxo.

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Section: Resultsmentioning

confidence: 96%

Biomass components of Pennisetum purpureum cv. Roxo managed at different growth ages and seasons

Maranhão

Cândido

Lopes

et al. 2018

Rev. bras. saúde prod. anim.

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“…Thus, plants with a greater diameter showed lower percentages of fiber and cellulose and greater DMDIV. According to Pereira et al (2014), the in vitro digestibility is lower in the whole plant (stem + leaf) compared with the leaves because of the high concentration of lignified material. That means when the concentration of stems decreases, DMDIV increases as a result of the greater lignin content.…”

Section: Genotype X Environment Relationshipmentioning

confidence: 99%

Canonical correlations among morpho-agronomic and chemical traits in hybrids between elephant grass and millet

Daher¹,

Pereira²,

Menezes³

et al. 2018

Aust J Crop Sci

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Studies involving the canonical correlation analysis in forage plants for interspecific hybrids between elephant grass (Pennisetum purpureum) and millet (Pennisetum glaucum) are scarce. The objectives of this study were to obtain estimates of coefficients of phenotypic, genotypic, and residual correlation and evaluate the degree of association between morpho-agronomic and chemical traits in 132 interspecific hybrids between elephant grass and millet. The experiment was conducted in the city of Coronel Pacheco-MG (Brazil). The experimental design was randomized complete blocks with 132 treatments and three replicates. Morphoagronomic and bromatological characteristics were analyzed. The correlation analysis indicated that plants with elevated dry matter yield considering the whole plant, leaf or stem in taller plants and plants with intense tillering have lower crude protein contents, while plants with a greater diameter show lower percentages of fiber and cellulose and greater dry matter digestibility in vitro. By canonical correlations, the chi-squared test at 1% probability by was found that the hybrids showing morpho-agronomic and chemical patterns with taller plants and high dry stem matter yield have increased percentage of cellulose. In contrast, in the same canonical pair, plants with reduced leaf dry matter yield showed lower contents of silica and organic matter and reduced digestibility in vitro. The effect on the improvement of forage quality in hybrids of Pennisetum and millet was evidenced by the better performance of the plants for high dry matter yield of the stem, showing the potential of the same for inclusion in breeding programs.

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Caracterização da forragem e da extrusa de clones de capim elefante anão sob lotação intermitente

Cited by 2 publications

References 9 publications

Biomass components of Pennisetum purpureum cv. Roxo managed at different growth ages and seasons

Biomass components of Pennisetum purpureum cv. Roxo managed at different growth ages and seasons

Canonical correlations among morpho-agronomic and chemical traits in hybrids between elephant grass and millet

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