Productivity and nutritive value of elephant grass pastures under organic and conventional production systems

Simonetti, Gabriela Descovi; Olivo, Clair Jorge; Seibt, Daiane Cristine; Bratz, Vinicius Felipe; Sauthier, J. C.; Adams, Carine Beatriz

doi:10.1590/0001-3765201920180011

Cited by 4 publications

(1 citation statement)

References 17 publications

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“…The lower values for dead material are related to the higher doses of nitrogen fertilizer, which prolong the useful life of the leaf and reduce the leaf senescence rate (Farias Filho et al ., 2018). Regarding the presence of other plants, an increase in pasture composition was noted because these plants are less frequently consumed by cows (Simonetti et al ., 2019).…”

Section: Discussionmentioning

confidence: 99%

Production and nutritive value of Tifton 85 bermudagrass pastures overseeded with annual ryegrass and inoculated with diazotrophic bacteria

et al. 2022

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The inoculation with Azospirillum brasilense has the potential to reduce the use of mineral fertilizers with efficient capacity to promote plant growth and yield. Most studies on the Azospirillum–plant association have been conducted on cereals and annual grasses. More studies are needed in perennial pastures, such as bermudagrass (Cynodon dactylon (L.) Pers.) that require substantial nitrogen (N) fertilization to maximize their production potential. Therefore, pastures based on Tifton 85 bermudagrass in association with annual ryegrass (Lolium multiflorum Lam.), which were inoculated with A. brasilense and fertilized with increasing amounts of N fertilizer and grazed by lactating Holstein cows were evaluated. Three grazing systems were evaluated: (i) Tifton 85, inoculated + 180 kg N/ha per year; (ii) Tifton 85 + 230 kg N/ha per year; and (iii) Tifton 85 + 280 kg N/ha per year. Forage samples were collected before and after grazing to evaluate the responses of the plants and animals. The forage yields of the systems were 21.0, 20.8 and 22.1 t DM/ha per year and the stocking rates were 3.9, 3.8 and 4.0 animal unit/ha per day, respectively. Crude protein, total digestible nutrients and neutral detergent fibre concentrations were 162, 560 and 667 g/kg, respectively. Inoculation in pastures planted with Tifton 85 bermudagrass in combination with ryegrass (plus 180 kg N/ha per year) had a positive effect, providing forage yield and nutritional value equivalent to those with fertilization with 230 kg N/ha per year.

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Section: Discussionmentioning

confidence: 99%

Production and nutritive value of Tifton 85 bermudagrass pastures overseeded with annual ryegrass and inoculated with diazotrophic bacteria

et al. 2022

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Outcomes of a comparison between pastoral and silvopastoral management on beef cattle productivity, animal welfare and pasture depletion in a Mediterranean extensive farm

Ripamonti,

Mantino,

Annecchini

et al. 2023

Agroforest Syst

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In spring 2021, 50 growing steers and heifers of the Maremmana breed (average age 321 d and weight 287 kg) were rotationally stocked under two different treatments (silvopastoral and pastoral). The aim was to evaluate the influence of grazing system on cattle growth and welfare, and pasture depletion. The experiment was carried out on a real Mediterranean agrosilvopastoral farm, located in central Italy. To implement rotational grazing, 3.69 ha of temporary grassland were split into six paddocks, three for each treatment. Cattle grazed for one week in one paddock and then were moved to the next one for a total of six weeks corresponding to six grazing periods. The group maintained on the silvopastoral system were allowed to access 3.31 ha of a Turkey oak (Quercus cerris L.) forest. Regarding the average daily gain, a significant interaction was found between the treatment and time. The average daily gain of the animals grazing in the open pasture was 1.20 kg d−1, while that of the cattle grazing in the silvopastoral system was 1.02 kg d−1. Despite the rate of growth being within the expected range for the Maremmana breed, the average daily gain of cattle in the silvopastoral system was significantly lower. One of the possible causes of this difference could be the higher energy requirements of the animals due to the different activity levels. The different management did not affect animal welfare indicators. Indeed, the serum cortisol concentration did not vary between treatments and among sampling times, while the hair cortisol concentration decreased significantly during the experiment for both groups. Regarding pasture health, allowing cattle to graze in the forest reduced pasture depletion because of the lower stocking rate and grazing pressure. Further studies are necessary to increase the knowledge of the role of forests and grazing management in other seasons than spring in extensive agrosilvopastoral systems.

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Evolution of the spontaneous sourdoughs microbiota prepared with organic or conventional whole wheat flours from South Brazil

Costa

Kothe

Grassotti

et al. 2022

An. Acad. Bras. Ciênc.

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The purpose of this study was to compare the composition and stability of bacteria and fungi communities during the propagation of sourdoughs prepared with organic or conventional whole wheat (Triticum aestivum) flours from South Brazil.Sourdoughs were prepared and samples were collected during different fermentation times (0 to 216 h). Total DNA of sourdough samples were extracted and the 16S rRNA gene and Internal Transcribed Spacer region were sequenced by MiSeq-Illumina. A total of 43 and 56 OTUs were identified and defined as core taxa in the bacterial and fungal communities, respectively. The analysis revealed increases in the relative abundances of the lactic acid (Pediococcus pentosaceus, Weissella hellenica and Limosilactobacillus pontis) and acetic acid bacteria (Gluconobacter frateurii and Acetobacter tropicalis)during the sourdough propagation. The filaments fungi, Alternaria tenuissima, Fusarium culmorum, Fusarium petersiae and Microdochium seminicola remained more stable in organic than conventional during propagation cycles. After 216 h of fermentation, both sourdoughs were dominated by acid-and salt-tolerant yeast Issatchenkia orientalis (syn Pichia kudriavzevii, and Candida glycerinogenes). In conclusion, there were no significant differences in microbial communities among the sourdough samples. This study revealed that both flours contain autochthonous LAB, AAB, and yeasts with biotechnological applications in sourdough bread-making.

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Productivity and nutritive value of elephant grass pastures under organic and conventional production systems

Cited by 4 publications

References 17 publications

Production and nutritive value of Tifton 85 bermudagrass pastures overseeded with annual ryegrass and inoculated with diazotrophic bacteria

Production and nutritive value of Tifton 85 bermudagrass pastures overseeded with annual ryegrass and inoculated with diazotrophic bacteria

Outcomes of a comparison between pastoral and silvopastoral management on beef cattle productivity, animal welfare and pasture depletion in a Mediterranean extensive farm

Evolution of the spontaneous sourdoughs microbiota prepared with organic or conventional whole wheat flours from South Brazil

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