João Virgínio Emerenciano Neto

ORCID: 0000-0003-3060-9696
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About
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Research Areas
  • Ruminant Nutrition and Digestive Physiology
  • Soil Management and Crop Yield
  • Agroforestry and silvopastoral systems
  • Growth and nutrition in plants
  • Genetic and phenotypic traits in livestock
  • Agricultural and Food Sciences
  • Crop Yield and Soil Fertility
  • Effects of Environmental Stressors on Livestock
  • Agronomic Practices and Intercropping Systems
  • Rural Development and Agriculture
  • Animal Nutrition and Physiology
  • Cassava research and cyanide
  • Environmental and biological studies
  • Meat and Animal Product Quality
  • Botanical Research and Applications
  • Rabbits: Nutrition, Reproduction, Health
  • Agriculture Sustainability and Environmental Impact
  • Agriculture and Rural Development Research
  • Plant Micronutrient Interactions and Effects
  • Plant Water Relations and Carbon Dynamics
  • Geography and Environmental Studies
  • Reproductive Physiology in Livestock
  • Moringa oleifera research and applications
  • Helminth infection and control
  • Agriculture and Biological Studies

Universidade Federal do Vale do São Francisco
2017-2025

Universidade Federal do Rio Grande do Norte
2016-2025

Instituto Federal de Educação, Ciência e Tecnologia Baiano
2024

Universidade São Francisco
2024

Southwest Bahia State University
2024

Universidade Federal do Maranhão
2024

Universidade Federal de Minas Gerais
2014-2016

Panicum maximum grasses are among the most used in Brazil because they have high forage production potential, nutritional value and adaptation to different climate conditions poor soils, which been improved by application of dolomitic limestone nitrogen fertilizers K2O, P2O5. The aim was evaluate tillering capacity structural characteristics six cultivars Brazilian semiarid region. test configured as a randomized block design with treatments—the Aruana, Massai, Mombaça, Tamani, Tanzânia,...

10.3390/su12093849 article EN Sustainability 2020-05-08

Abstract The present study aimed to determine the effect of combining sulfur (S) with nitrogen (N) in pastures Marandu palisade grass ( Urochloa brizantha [A. Rich.] R.D. Webster) at an early stage degradation. experiment was conducted São Luís de Montes Belos (located Brazilian Cerrado region), starting October 2019 and ending September 2021. design used a randomized block arranged factorial scheme, where plots were made up S doses subplots N doses, four replications. Five (0, 65, 130, 195...

10.1111/grs.70002 article EN Grassland Science 2025-03-27

Abstract This study aimed to evaluate the fermentation profile and nutritional quality of silages composed cactus pear maniçoba. Two experiments were performed: first evaluated characteristics, chemical composition determined organic acids in with inclusion five levels maniçoba (0, 25, 50, 75 100%) six opening times (1, 7, 15, 30, 60 90 days). The second experiment nutrient intake, digestibility, water balance nitrogen Canindé goats fed diets based on silage four (25, 100%), animals per...

10.1017/s0021859620000581 article EN The Journal of Agricultural Science 2020-05-01

Evapotranspiration (ET) is the main driver of energy balance partitioning and influences hydrological carbon cycles at global, regional local scales. Furthermore, it requirement for developing strategies to improve water use in agriculture. It known that there a close relationship between ET rainfall, especially tropical environments. Thus, goal this article was evaluate how its controls (surface conductance - Gs; decoupling coefficient Ω; Priestley-Taylor parameter α) respond seasonal...

10.1016/j.agwat.2024.108884 article EN cc-by-nc Agricultural Water Management 2024-05-24

The objective of this study was to evaluate the effects pasture height at pre-grazing Massai grass on quality available forage, forage intake and performance lambs raised for meat production. treatments consisted four canopy heights (35, 40, 45 50 cm). Pastures were managed by intermittent stocking method 32 sheep used. Dry matter (DMI) estimated Lipe® indicator. Green allowance not affected heights. There no effect chemical composition stem or leaf blades, except crude protein content which...

10.4314/sajas.v48i6.10 article EN cc-by South African Journal of Animal Science 2019-02-06

ABSTRACT This study aimed to evaluate the use of wastewater from cassava processing as organic fertilizer on pastures Brachiaria brizantha cv. ‘Marandu’. The treatments were doses (0, 15, 30, 60 and 120 m3 ha-1), in a randomized block design with four replicates. structural characteristics morphological composition evaluated, July 2013 January 2014. addition promoted positive linear increase three cuts for canopy height, light interception leaf area index. maximum dry matter (DM) production...

10.1590/1807-1929/agriambi.v21n6p404-409 article EN Revista Brasileira de Engenharia Agrícola e Ambiental 2017-05-24

Identifying forage species that are responsive in regions with marked water deficits is one of the greatest challenges for sustainable development agriculture. However, information still lacking about persistence response those pastures and their abilities to produce new tissues at times scarcity. We hypothesized Brachiaria grass has a tillering capacity during water-stress periods. This study thus examined structural characteristics four brizantha cultivars (Xaraés, Piatã, Marandu,...

10.5398/tasj.2020.43.2.133 article EN cc-by-sa Tropical Animal Science Journal 2020-06-01

The objective of this study was to evaluate the canopy structure and performance sheep raised on massai grass during dry season in response management adopted wet season. treatments consisted two targets light interception (90 95%) post-grazing heights (15 25 cm) a 2 x factorial scheme. Pastures were managed season, while continuous stocking used following pasture characteristics evaluated: height, forage mass, leaf blade, stem dead matter blade:stem ratio, crude protein, neutral detergent...

10.17523/bia.v74n2p86 article EN cc-by-nc Boletim de Indústria Animal 2017-01-01

The study aimed to evaluate the use of β-mannanase and mannan oligosaccharides (MOS) replace growth promoters in broiler diets. Four hundred male Cobb chicks were used, with initial weight 45±1g, distributed a completely randomized design five treatments eight repetitions ten birds. were: basal feed; feed without promoter; promoter + β-mannanase; MOS; MOS. intake birds increased response dietary compared diet during period 1-21 days age. A higher gain improved conversion was found at 42 age...

10.1590/0103-8478cr20131544 article EN cc-by-nc Ciência Rural 2014-10-08

This study was undertaken to examine biometric measurements during the growth phase of male and female Santa Inês sheep reared in Brachiaria brizantha pastures northeastern Brazil. The experiment involved 24 castrated males females at an initial age 90 days, with average body weight 19.04 ± 0.96 kg. Treatments consisted effect four cultivars (Marandu, Xaraés, Piatã Paiaguás) two sexes. Six animals were used per treatment, a randomized-block experimental design. following characteristics...

10.1371/journal.pone.0219343 article EN cc-by PLoS ONE 2019-07-30

This paper aimed to evaluate the dynamics of tillering, tiller density and structural characteristics Brachiaria brizantha, Panicum maximum Cenchrus ciliaris under a cutting regime.The utilized design was randomized blocks with six treatments (cultivars) three replications.The evaluations were conducted from May September 2011, data grouped into two periods, rainy season beginning dry season.The greatest population observed in Massai cultivar, averaging 1,019 tillers.m -2 .The mortality rate...

10.14393/bj-v32n4a2016-32944 article EN cc-by Bioscience Journal 2016-01-01

The forage sward height measurement is a practical and potential tool for grazing management. Thus, the objective of this study was to evaluate structure pasture accumulation related pre-grazing Panicum maximum cv. Massai, before being grazed by sheep. conducted in Federal University Rio Grande do Norte, Macaíba, Brazil. treatments were heights at: 35, 40, 45 50 cm. post-grazing 15 cm all treatments. interaction between cycles only statistically significant light interception (LI) leaf area...

10.5539/jas.v9n4p155 article EN Journal of Agricultural Science 2017-03-14

Abstract This study aimed to evaluate the agronomic and structural characteristics of massai grass under grazing by sheep supplemented in dry season. The treatments were supplements offered pastures: multiple mixture, leucaena hay, gliricidia hay soybean meal. pastures evaluated regarding: canopy height; forage accumulation mass; accumulation, mass percentage morphological constituents; leaf:stem green mass:dead material ratio; pre‐ post‐grazing bulk density. Higher pre‐grazing heights...

10.1111/grs.12165 article EN Grassland Science 2017-04-21

The objective was to evaluate the productive and structural characteristics of tropical grasses performance sheep supplemented during dry season. treatments consisted Marandu, Piatã, Massai Aruana cultivars managed under intermittent stocking with seven occupation days 35 d rest, a variable rate. evaluated variables were forage masses, morphological components, chemical composition pasture performance. mass similar among cultivars, while leaf blade percentage higher in cultivar. There...

10.22319/rmcp.v11i1.5083 article EN cc-by-nc-sa Revista Mexicana de Ciencias Pecuarias 2020-02-27

The aim of this study was to predict carcass traits Santa Inês lambs finished in tropical pastures by using biometric measurements. Data originated from two experiments involving 56 (32 experiment I and 24 II). In both experiments, the sheep were that Panicum maximum Brachiaria brizantha, being conducted rainy season II dry season. following measurements recorded before slaughter: body length (BL), withers height (WH), rump (RH), thorax width (TW), (RW), chest (CW), heart girth (HG), thigh...

10.3390/ani11082329 article EN cc-by Animals 2021-08-07

The objective of this study were to examine the effects diets containing spineless cactus associated with hays different legume species [gliricidia ( Gliricidia sepium ), “catingueira” Caesalpinia bracteosa “sabiá” Mimosa caesalpiniifolia Benth ) and “catanduva” Piptadenia moniliformis )] on intake, digestibility, performance carcass traits lambs. Twenty-four ½ Santa Inês × Soinga lambs an average body weight 21.4 ± 2.53 kg distributed into four treatments in a completely randomized design....

10.1371/journal.pone.0261554 article EN cc-by PLoS ONE 2021-12-17

This study examined the effect of different supplementation strategies for ewes in last third gestation, kept on a deferred Brachiaria brizantha cv. Marandu pasture, their performance and growth curve lambs. A total 54 ewes, no defined breed, with an average weight 41.10±3.10 kg, were used completely randomized design, divided into three groups (18 per treatment). In total, 61 lambs born, 28 females 33 males, [...]

10.37496/rbz5120210094 article EN cc-by Revista Brasileira de Zootecnia 2022-01-01

Objetivou-se avaliar o efeito de dois solos distintos sobre as características produtivas, morfogênicas e estruturais duas cultivares Brachiaria brizantha. O experimento foi conduzido em delineamento inteiramente ao acaso, com três repetições. Os tratamentos consistiam (Piatã Marandu) (Cambissolo Argissolo), um arranjo fatorial 2 x 2. Não houve interação (P>0,05) entre os fatores. tipo solo a cultivar não afetaram das gramíneas. Houve (P<0,05) do da produtivas forrageiras. A altura...

10.33448/rsd-v9i7.2947 article PT Research Society and Development 2020-05-03

ABSTRACT The objective of this study was to evaluate the effect different protein sources on performance lamb ewes and their offspring supplemented in deferred pasture. treatments were sources: soybean meal, cotton cake, babassu cake coconut cake. weighed evaluated for body condition score during gestation, parturition weaning phases. lambs at birth weaning. structural variables chemical composition pasture usage period. Grass height forage mass higher when gestation stages. leaf not altered...

10.1590/1678-4162-11702 article EN cc-by Arquivo Brasileiro de Medicina Veterinária e Zootecnia 2020-09-01

Resumo Objetivou-se avaliar o efeito da inclusão de cunhã na dinâmica fermentativa, qualidade nutricional e estabilidade aeróbia silagens mistas capim-elefante. Níveis (0, 20, 40, 60 80% matéria natural) foram adicionados às Adotou-se delineamento inteiramente casualizado, com 5 tratamentos 3 repetições, totalizando 15 silos experimentais, que abertos após 30 dias fermentação. A nas capim-elefante resultou em quadrático para permeabilidade, densidade, pH máximo, final, tempo atingir a...

10.1590/1809-6891v25e-76994p article PT cc-by Ciência Animal Brasileira 2024-01-01

The aim was to evaluate the impact of supplementation with different protein sources from agro-industrial production on parasitological profile ovine matrices and development their offspring. used were: soybean bran, cotton pie, babassu coconut pie. A total 60 were used, confirmed pregnancy supplemented in final third gestation at 0.5% live weight pastures deferred Marandu grass. evaluations occurred lactation phase until weaning. data collected counting eggs per gram feces (EPG)...

10.14393/bj-v36n2a2020-39823 article EN cc-by Bioscience Journal 2020-02-11
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