Dynamics of degradation of high-quality tropical forage according to levels of nitrogen supplementation

Pinheiro, Jéssyca Karen; Ferreira, Raimundo Ribeiro; Neto, Severino Gonzaga; Signoretti, Ricardo Dias; Henriques, Lara Toledo; Oliveira, Juliana

doi:10.1007/s11250-019-02136-1

Cited by 2 publications

(2 citation statements)

References 16 publications

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“…In this sense, the assessment of the potentially degradable fractions in the rumen can determine the best time for harvesting the plant, associated with adequate nutritional value. The in-situ degradability technique is adequate to this end and allows quantifying the disappearance of nutrients over time, considering the real conditions of the rumen environment (19,21) . The objective of this study was to determine the chemical composition and in situ degradability of grasses of the genus Panicum at three post-regrowth ages.…”

Section: Introductionmentioning

confidence: 99%

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: Introductionmentioning

confidence: 99%

Ruminal degradation of Panicum grasses in three post-regrowth ages

et al. 2020

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“…These losses in energetic efficiency may potentially have a negative impact on animal growth and production efficiency. In addition, there is accumulation of excess N in the ruminal environment as ammonia which is no longer directed to the growth of microorganisms and therefore affects microbial efficiency as well as the optimization of degradation of available fodder ( Pinheiro et al, 2020 ). This may explained the higher dietary protein level, the lower digestibility in the results.…”

Section: Discussionmentioning

confidence: 99%

Exploring the growing forest musk deer (Moschus berezovskii) dietary protein requirement based on gut microbiome

Gong

Song²,

Ai³

et al. 2023

Front. Microbiol.

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It is necessary to assess the appropriate dietary protein level of the forest musk deer (FMD), as nutritional needs are unclear. The microbiome in gastrointestinal tracts plays an important role in regulating nutrient utilization, absorption and host growth or development. Thus, we aimed to evaluate growth performance, nutrient digestibility and fecal microbiome of growing FMD supplied with different protein levels of diets. Eighteen 6-month-old male FMD with an initial weight 5.0 ± 0.2 kg were used in a 62-day trial. The animals were randomly distributed to three groups, the dietary crude protein (CP) level was 11.51% (L), 13.37% (M), and 15.48% (H). The results showed that the CP digestibility decreased as dietary CP level increased (p < 0.01). Compared with group L and H, FMD in M group has higher average daily gain, feed efficiency and neutral detergent fiber digestibility. For the fecal bacterial community, the percentage of Firmicutes was increased, Bacteroidetes was decreased and the diversity of microbiota significantly reduced (p < 0.05) with the increasing of dietary protein. The proportion of Ruminococcaceae_005, Ruminococcaceae_UCG-014 and uncultured_bacterium_f_Lachnospiraceae were significantly increased wtih rising CP, the proportions of Bacteroides and Rikenellaceae_RC9_gut_group were significantly decrease nevertheless at the genus level. The higher abundance of f_Prevotellaceae and g_Prevotellaceae_UCG_004 were found at M group by LEfSe analysis. The relative abundance of uncultured_bacterium_f_Ruminococcaceae was positively correlated with the average daily gain and feed conversion ratio (p < 0.05), whereas Family_XIII_AD3011_group was negatively correlated with feed conversion ratio (p < 0.05). The UPGMA tree showed L and M groups were closer in clustering relationship, while H group was clustered separately into a branch, which indicated that the bacterial structure had changed greatly with protein level increased from 13.37 to 15.48%. Overall, our results indicated that the optimum dietary CP for the growing FMD was 13.37%.

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Dynamics of degradation of high-quality tropical forage according to levels of nitrogen supplementation

Cited by 2 publications

References 16 publications

Ruminal degradation of Panicum grasses in three post-regrowth ages

Ruminal degradation of Panicum grasses in three post-regrowth ages

Exploring the growing forest musk deer (Moschus berezovskii) dietary protein requirement based on gut microbiome

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