Capacidade produtiva e qualidade nutricional de gramíneas perenes submetidas a sistema contínuo de cortes

Poczynek, Milaine; Neumann, Mikael; Horst, Egon Henrique; Leão, Guilherme Fernando Mattos; Ueno, Robson Kyoshi

doi:10.1590/1678-4162-8768

Cited by 5 publications

(5 citation statements)

References 13 publications

(11 reference statements)

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“…This trend is in accordance with the results obtained for grasses of the genus Panicum by Pereira et al (13) , Carvalho et al (14) and Garcez et al (26) , corroborating the increase in the concentrations of structural carbohydrates with advancing age of the plant for greater support at the vegetative stage. However, variations in the chemical composition of tropical grasses also depend on the type of cultivar, the presence of side tillers, and the light intensity, which does not make the leaf: stem ratio an exclusive determinant of the nutritional value of these species (15) .…”

Section: Resultsmentioning

confidence: 99%

“…The level of rumen degradability of CP can be variable between different forage species, which determines the availability of ammonia nitrogen in the rumen, and the proportion of amino acids from the diet and microbial protein, that reach the intestine, which are directed to tissue protein synthesis (25) . The concentration of crude protein is higher at the vegetative stages of forages and decline at the flowering stage, which may vary depending on differences between species, initial level of protein in the plant, stem and leaf proportions, content of fiber components in the cell wall and ambient temperature (15,21) .…”

Section: Resultsmentioning

confidence: 99%

“…Tanzania grass (Panicum maximum cv. Tanzania) is an alternative for soil areas with greater fertility, with good resistance to spittlebug and higher production of leaves with adequate nutritional value (15) . Among the factors related to the management of these forages, the interval between cuts affects both production and quality.…”

Section: Introductionmentioning

confidence: 99%

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Ruminal degradation of Panicum grasses in three post-regrowth ages

et al. 2020

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The objective was to evaluate the chemical composition and in situ degradation of Maasai, Mombasa and Tanzania grasses belonging to the genus Panicum, at 22, 34 and 46 days after regrowth. The contents of dry matter (DM), crude protein (CP), neutral detergent fiber (NDF) and acid detergent fiber (ADF) were determined. For the evaluation of ruminal degradation, 4 g sample were placed in nylon bags and incubated in the rumen of a fistulated animal, for 6, 24 and 72 h. The experiment had a completely randomized design for chemical composition analysis and a split-split plot completely randomized design for in situ degradation, with means compared by Tukey test at 5%. There was an increase in the contents of DM (+ 1.69%) and NDF (+ 5.06%) (P <0.05) of the grasses at the highest cutting ages with reduction in the CP fraction. The potential degradation (PD) of DM, NDF and CP decreased with advancing age of grasses, with an increase in colonization time (0.69 h) and NDF degradation rate (1.14%/h). The increase in the post-regrowth age of the Massai, Mombasa, and Tanzania grasses increases the acid detergent fiber content and reduces the crude protein content, with a negative effect on the degradation of DM, PB and NDF. The management of these cultivars is indicated at 22 and 34 days post-regrowth to obtain forage with better nutritional value.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Ruminal degradation of Panicum grasses in three post-regrowth ages

et al. 2020

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“…Jiggs) was introduced in Brazil by an East Texas producer named J. C. Riggs (Carvalho, Pedreira, & Tonato, 2012). This grass has presented a competitive production potential over other forages, during different seasons of year, surviving and producing under adverse climatic conditions (Brandstetter et al, 2018;Poczynek, Neumann, Horst, Leão, & Ueno, 2016a;Poczynek et al, 2016b;Silva et al, 2016). In addition, it presents a better structural arrangement of the cell wall, with lower fiber concentration, being more interesting for animal nutrition in relation to the known Tifton 85 grass (Rezende et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Protein and carbohydrate fractionation of Jiggs Bermudagrass in different seasons and under intermittent grazing by Holstein cows

Brandstetter

Costa

Santos

et al. 2019

Acta Sci. Anim. Sci.

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Jiggs bermudagrass has presented competitive production potential over other forages. However, there is a lack of information about the nutritional value of this forage with important relevance in ruminant nutrition. This study aimed to evaluate the protein and carbohydrate fractionation of Jiggs bermudagrass in different seasons of the year under intermittent grazing by Holstein cows. The experiment was conducted during one year in a completely randomized design with nine replications and treatments consisted of the effect of four seasons: fall, winter, spring and summer. The results showed that there were seasonal variations in the fractions of proteins and carbohydrate, with the exception of the protein fraction B3. The better climatic conditions in spring and summer contributed to an increase in the protein fraction A and carbohydrate A+B1. The winter had a greater fraction C of protein and carbohydrate, reflecting the nutritive value of the forage. The use of irrigation during fall and winter had a positive effect on nitrogen fractions B1 and B2 and on non-fiber carbohydrates.

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“…In order to exploit the full productive potential of a forage grass, aiming for increased animal production, it is necessary that, in addition to the appropriate choice of forage crop, adequate harvest management. For this, it is necessary to understand the production potential and variations in the forage nutritive value under different environment and management conditions, in order to optimize the stocking rate (3) .…”

Section: Introductionmentioning

confidence: 99%

PRODUCTION AND NUTRITIVE VALUE OF CANARANA ERECTA LISA (Echinocloa piramidalis Lam.) IN RESPONSE TO HARVEST INTERVALS

et al. 2019

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The objective of this study was to compare and explain the variations in the production and nutritive value of canarana erecta lisa grass (Echinocloa pyramidalis Lam.) at different harvest intervals. The treatments corresponded to the cut intervals of 20, 27, 34, 41, 48, 55, 62, and 69 days. The experimental design was a randomized complete block design with three replications. Each experimental unit had 6m2 (3m ×2m). The variables studied included forage production, canopy height, and nutritive value o harvested forage. Forage production varied from 11517 to 12324 kg ha-1; Plant heights from 48.8 to 234 cm; Neutral detergent fiber (NDF) from 68.8% to 71.13%; Acid detergent fiber (ADF) from 36.20% to 44.15%; Crude protein (CP) from 11.43% to 5.85% and in “in vitro” dry matter digestibility (IVDMD) from 63.30% to 47.42%. These values indicated that the nutritive value of canarana erecta lisa was reduced at longer harvest intervals. It is recommended to harvest the grass at 35 days of regrowth favoring productivity, nutritive value and forage digestibility.

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Capacidade produtiva e qualidade nutricional de gramíneas perenes submetidas a sistema contínuo de cortes

Abstract: RESUMOO objetivo do trabalho foi avaliar a produtividade e as características bromatológicas dos estratos superior e inferior de gramíneas perenes em sistema contínuo de cortes.

Cited by 5 publications

References 13 publications

Ruminal degradation of Panicum grasses in three post-regrowth ages

Ruminal degradation of Panicum grasses in three post-regrowth ages

Protein and carbohydrate fractionation of Jiggs Bermudagrass in different seasons and under intermittent grazing by Holstein cows

PRODUCTION AND NUTRITIVE VALUE OF CANARANA ERECTA LISA (Echinocloa piramidalis Lam.) IN RESPONSE TO HARVEST INTERVALS

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