Caracterização da caatinga e da dieta de novilhos fistulados, na época chuvosa, no semiárido de Pernambuco

Santana, Daniel Fernando Ydoyaga; Lira, Mário de Andrade; Santos, Mércia Virgínia Ferreira dos; Ferreira, Marcelo de Andrade; Silva, Maria José de Araújo; Marques, Kleyton Alcantara; Mello, Alexandre Carneiro Leão de; Santos, Djalma Cordeiro dos

doi:10.1590/s1516-35982011000100010

Cited by 21 publications

(14 citation statements)

References 12 publications

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“…Average NDIP value was 86.07 for leaves and 575.8 g/kg CP for stems. Results found in this study were higher than those found by Moreira et al (2006) and Ydoyaga Santana et al (2011), evaluating the rainy period, for leaves and similar for stems. AIP averaged 671.7 g/kg CP for leaves and 637.7 g/Kg CP for stems, reflecting Caatinga nutritional reality as a forage source.…”

Section: Resultscontrasting

confidence: 82%

“…CP amounts during collection months were 169.6 and 89.9 g/kg DM for leaves and stems, respectively. These results were similar for leaves and lower for stems compared to those found by Ydoyaga Santana et al (2011), 164.7 g/kg DM, Evaluating the caatinga's chemical composition in the rainy season. Leaf NDF contents were similar between the first and third month, differing from the second month, with average results of 482.1 and 715.6 g/kg DM for leaves and stems, respectively.…”

Section: Resultssupporting

confidence: 76%

“…Shrub/tree layer plants have lignified stems, reducing DM digestibility. Taking into account forage species layer and plant structure in the rainy season, Ydoyaga Santana et al (2011) studied cattle in Brazil's Pernambuco state semiarid and found higher leaf selection compared to stems, ranging from 41.0 to 63.8 % for leaves and from 12.9 to 16.5% for stems in the herbaceous layer. In the tree/shrub layer, values from 17.3 to 33.3 % for leaves and from 4.7 to 10.6 % for stems were found.…”

Section: Resultsmentioning

confidence: 99%

“…The diet selected by grazing animals has different chemical and botanical characteristics compared to the forage available in pasture. More leaves and green materials are selected by animals in relation to stems and dead material (YDOYAGA SANTANA et al, 2011). Therefore, information on animal dry matter intake in different Caatinga grazing systems is still scarce, especially when is handled in several different ways (FORMIGA et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

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Influence of the period of year on the chemical composition and digestibility of pasture and fodder selected by goats in caatinga

Silva

Magalhães

et al. 2017

Rev. bras. saúde prod. anim.

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SUMMARY This study aimed to verify the influence of months on chemical composition and in vitro digestibility of pasture and forage selected by goats in the semiarid region of Brazil’s Pernambuco state. Six male goats fistulated in the rumen were used in a completely randomized design. Forage collection was conducted in herbaceous and shrub/tree layers, in order to simulate goat grazing, and materials were separated into leaves and branches. Extrusa and pasture collections were held in November, January and February/March. There was collection month (P <0.05) effect for pasture on dry matter (DM), crude protein (CP), neutral detergent fiber (NDF), acid detergent fiber (ADF), with average values of 458.27g/kg NM and 155.46, 521.30 and 390.13g/kg DM, respectively. For the stem (P <0.05) for DM, Organic matter (OM), mineral matter (MM), ethereal stratum (EE), ADF, acid detergent unavailable protein (AIP), total carbohydrates (TCHO) and dry matter in vitro digestibility (DMIVD), with average values of 487.47g/kg NM and 930.80, 69.07, 20.67, 440.30 and 63.78g/kg DM, respectively. About the extrusa, there was collection time effect (P <0.05) on the DM, OM, MM, CP, EE, AIP, TCHO, Non-fibrous carbohydrates (NFC) and DMIVD, with average values of 84.53g/kg DM, 863.03, 136.97, 152.90, 33.60, 14.07, 676.37 and 55.35g/kg DM, respectively. Rainfall changes in the rainy season in the caatinga altered pasture quality, causing changes in the diet selected by goats, mainly in DM, CP, CNF and DMIVD.

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Section: Resultscontrasting

confidence: 82%

Section: Resultssupporting

confidence: 76%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Influence of the period of year on the chemical composition and digestibility of pasture and fodder selected by goats in caatinga

Silva

Magalhães

et al. 2017

Rev. bras. saúde prod. anim.

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“…, Santana et al . ). Conversely, crop stands are expected to remain free of forest invasion due to regular weeding before land abandonment.…”

Section: Discussionmentioning

confidence: 97%

Land use, fallow period and the recovery of a Caatinga forest

et al. 2016

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Caatinga vegetation continues to be converted into mosaics of secondary forest stands, but the affect of this process on biodiversity has not yet been examined. We used 35 regenerating and old-growth stands of Caatinga to examine the recovery of plant assemblages subsequent to slash-and-burn agriculture and cattle ranching/pasture in northeastern Brazil. Plant assemblages were contrasted in terms of community structure (stem density/basal area/species richness/diversity), functional (leaf habit/reproductive traits) and taxonomic composition. Soil attributes were also examined to infer potential drivers for cross-habitat differences. As expected, plant assemblages clearly differed across a large set of community-level attributes, including all trait categories relative to leaf habit and reproduction (pollination syndrome/floral color, size, type). Overall, old-growth forest stands supported distinct and more diverse assemblages at the plot and habitat level; e.g., long-lived tree species were almost exclusively found in old-growth forest stands. For most attributes, plant assemblages subsequent to pasture exhibited intermediate values between those exhibited by old-growth forest and those of agriculture-related stands. Surprisingly, soils exhibited similar fertility-related scores across habitats. Our results indicate that: (1) sprouting/resprouting represents an important mechanism of forest regeneration; (2) assemblage-level attributes suggest recovery at distinct rates; (3) forest regeneration implies community-level changes in both vegetative and reproductive functional attributes, including directional changes; (4) Caatinga is not able to completely recover in a period of 15-yr following land abandonment; and (5) historical land use affects recovery rates and successional pathways/taxonomic trajectories. Seasonally dry tropical forests may intrinsically cover a wide range of patterns relative to successional model, recovery rates and successional pathways.Abstract in Portuguese is available with online material.

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Spatiotemporal distribution of precipitation and its characteristics under tropical atmospheric systems of Brazil: Insights from a large sub‐hourly database

Lemos,

Coelho,

Freitas

et al. 2023

Hydrological Processes

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The study of rainfall properties at various spatiotemporal scales is deeply important for understanding a large range of socio‐environmental processes and variables (e.g., water resources, agriculture, socio‐ecosystemic services, natural risk assessment). However, such studies on rainfall characteristics, especially at sub‐hourly resolutions, are scarce in large areas of South America due to the lack of a high‐resolution temporal database. The Brazilian National Centre for Monitoring and Early Warning of Natural Disasters (CEMADEN) has gradually implemented, starting in 2013, a sub‐hourly monitoring network composed of approximately 3500 automated rain gauges distributed across Brazil, enabling access to new hydrological studies in this vast tropical country featuring a range of biomes. This study analysed the characteristics of rainfall events for the whole of Brazil on sub‐daily and sub‐hourly timescales, using 7 years of data (from 2014 to 2021) provided by CEMADEN. Rainfall events were defined by the minimum inter‐event time (MIT) and the minimum depth (1 mm). Seven MITs (30, 60, 120, 180, 360, 720, and 1440 min) were considered to evaluate the behaviour of rainfall event characteristics and their relationships. The Gaussian mixture model method was applied to identify regions with similar rainfall patterns according to the MIT. Six groups with homogeneous characteristics were identified, evidencing the climatic diversity of Brazil. The results show that the MIT strongly influences precipitation properties (especially the dry time and the number of events). The highest number of events occurred in the North‐east Coast region, which exceeded 200 events per year (MIT < 60 min), while the lowest number of events was observed in the Semiarid region, which reached only 38 events per year with an MIT of 1440 min. Moreover, the events with the highest rainfall intensities were found in the Central region. The results found in this study provide a better understanding of precipitation and its characteristics in Brazil, highlighting the climatological diversity of this country.

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Caracterização da caatinga e da dieta de novilhos fistulados, na época chuvosa, no semiárido de Pernambuco

Cited by 21 publications

References 12 publications

Influence of the period of year on the chemical composition and digestibility of pasture and fodder selected by goats in caatinga

Influence of the period of year on the chemical composition and digestibility of pasture and fodder selected by goats in caatinga

Land use, fallow period and the recovery of a Caatinga forest

Spatiotemporal distribution of precipitation and its characteristics under tropical atmospheric systems of Brazil: Insights from a large sub‐hourly database

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