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  • 1
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    Online Resource
    Agronomic Characteristics, Chemical Composition and In vitro Gas Production of Sugarcane Cultivars (Saccharum spp.) for Feeding Ruminants
    Sciencedomain International ; 2019
    In:  Journal of Experimental Agriculture International ( 2019-04-23), p. 1-8
    Details
    In: Journal of Experimental Agriculture International, Sciencedomain International, ( 2019-04-23), p. 1-8
    Abstract: The aim of this work was to evaluate the agronomic characteristics, chemical composition and in vitro gas production of sugarcane (Saccharum spp.) cultivars used in ruminant feed. The experimental design was a randomized block containing seven treatments and three replications totaling 21 plots. The cultivars RB835436, RB925211, RB925345, RB937570, RB945961, RB955970 e SP91-1049 was evaluated for dry matter, dry matter yield, stalk percentage, stalk tons per hectare, plant height, stalk diameter, number of tillers per linear meter, mass per stem, soluble solids content (BRIX), NDF/BRIX ratio and tons of sucrose/ha, total digestible nutrients, digestible energy, metabolizable energy, net energy and in vitro digestibility of organic matter, crude protein, neutral detergent fiber (NDF) and acid detergent, of digestion and In vitro gas production of non-fibrous carbohydrates, latency time, digestion rate and gas production of fibrous carbohydrates, and in vitro digestibility of organic matter. There was a significant difference between the cultivars regarding the neutral detergent fiber content, in vitro digestibility of organic matter, total digestible nutrients, digestible energy, net energy, degradation rates of fibrous and non-fibrous carbohydrates and latency period. There was a negative correlation between stem percentage and NDF/BRIX and positive correlation between in vitro digestibility of organic matter and total digestible nutrients. The results were submitted to analysis of variance and mean test by Scott-Knott and Pearson's correlation analysis. The statistical program used was SAEG 2000. The RB835486 variety was superior to the other cultivars, as it presented 93.28% of stem, 57.5% of in vitro digestibility of organic matter, NDF / BRIX ratio of 2.68, 43.78% NDF, latency period 2.86h and fibrous carbohydrate degradation rate of 2.26% per hour. Therefore, this cultivar was better indicated for animal feeding between May and July in the State of Mato Grosso, Brazil.
    Type of Medium: Online Resource
    ISSN: 2457-0591
    URL: Article
    DOI: 10.9734/jeai/2019/v35i130194
    Language: Unknown
    Publisher: Sciencedomain International
    Publication Date: 2019
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  • 2
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    Online Resource
    Defoliation height and potassium fertilization of Mulato II grass
    Universidade Estadual de Londrina ; 2017
    In:  Semina: Ciências Agrárias Vol. 38, No. 4Supl1 ( 2017-08-25), p. 2719-
    Details
    In: Semina: Ciências Agrárias, Universidade Estadual de Londrina, Vol. 38, No. 4Supl1 ( 2017-08-25), p. 2719-
    Abstract: A pot trial in greenhouse conditions was carried out to identify at which defoliation height Mulato II grass (Urochloa hibrida cv. Mulato II) should be managed and to determine whether potassium fertilization is necessary in soil with high potassium content. The experiment was carried out in a greenhouse in a randomized block design with six treatments and five replications. Treatments consisted of a 3 × 2 factorial arrangement, with three defoliation heights (50, 65, and 80 cm) and with or without potassium maintenance fertilization. The production characteristics and chemical composition of the forage plant were evaluated. There was no interaction effect between defoliation height and fertilization with or without potassium on any of the analyzed variables, except for mineral content in Mulato II grass. The tillers and leaves number, shoot dry matter, leaf+sheath, root system, and residue were influenced by defoliation heights and potassium fertilization, except for the leaf blades and root dry matter, leaf blade/stem+sheath ratio, and leaves number, which were not influenced by potassium fertilization. Higher shoot dry matter was observed at the heights of 65 and 80 cm; however, comparing these two heights, leaf + sheath dry matter was lower at 65 cm. Regarding the grass’s chemical composition, there was an increase in neutral and acid detergent fiber and indigestible neutral detergent fiber contents as the defoliation height increased, which resulted in lower production of potentially digestible dry matter, which can compromise the potential use of the forage by animals. Among evaluated treatments, Mulato II grass defoliation is recommended for a maximum height of 65 cm. Potassium fertilization increases the yield and the potentially digestible dry matter content of Mulato II grass, even when cultivated in soil with high potassium content.
    Type of Medium: Online Resource
    ISSN: 1679-0359 , 1676-546X
    URL: Article
    DOI: 10.5433/1679-0359.2017v38n4Supl1p2719
    Language: Unknown
    Publisher: Universidade Estadual de Londrina
    Publication Date: 2017
    detail.hit.zdb_id: 2551446-5
    SSG: 22
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  • 3
    Online Resource
    Online Resource
    Defoliation height and potassium fertilization of Mulato II grass
    Universidade Estadual de Londrina ; 2017
    In:  Semina: Ciências Agrárias Vol. 38, No. 4Supl1 ( 2017-08-25), p. 2719-
    Details
    In: Semina: Ciências Agrárias, Universidade Estadual de Londrina, Vol. 38, No. 4Supl1 ( 2017-08-25), p. 2719-
    Abstract: A pot trial in greenhouse conditions was carried out to identify at which defoliation height Mulato II grass (Urochloa hibrida cv. Mulato II) should be managed and to determine whether potassium fertilization is necessary in soil with high potassium content. The experiment was carried out in a greenhouse in a randomized block design with six treatments and five replications. Treatments consisted of a 3 × 2 factorial arrangement, with three defoliation heights (50, 65, and 80 cm) and with or without potassium maintenance fertilization. The production characteristics and chemical composition of the forage plant were evaluated. There was no interaction effect between defoliation height and fertilization with or without potassium on any of the analyzed variables, except for mineral content in Mulato II grass. The tillers and leaves number, shoot dry matter, leaf+sheath, root system, and residue were influenced by defoliation heights and potassium fertilization, except for the leaf blades and root dry matter, leaf blade/stem+sheath ratio, and leaves number, which were not influenced by potassium fertilization. Higher shoot dry matter was observed at the heights of 65 and 80 cm; however, comparing these two heights, leaf + sheath dry matter was lower at 65 cm. Regarding the grass’s chemical composition, there was an increase in neutral and acid detergent fiber and indigestible neutral detergent fiber contents as the defoliation height increased, which resulted in lower production of potentially digestible dry matter, which can compromise the potential use of the forage by animals. Among evaluated treatments, Mulato II grass defoliation is recommended for a maximum height of 65 cm. Potassium fertilization increases the yield and the potentially digestible dry matter content of Mulato II grass, even when cultivated in soil with high potassium content.
    Type of Medium: Online Resource
    ISSN: 1679-0359 , 1676-546X
    URL: Article
    DOI: 10.5433/1679-0359.2017v38n4SUPLp2719
    Language: Unknown
    Publisher: Universidade Estadual de Londrina
    Publication Date: 2017
    detail.hit.zdb_id: 2551446-5
    SSG: 22
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  • 4
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    Online Resource
    Tolerância de híbridos de braquiária ao estresse hídrico
    Scientific Electronic Archives ; 2023
    In:  Scientific Electronic Archives Vol. 16, No. 10 ( 2023-09-29)
    Details
    In: Scientific Electronic Archives, Scientific Electronic Archives, Vol. 16, No. 10 ( 2023-09-29)
    Abstract: O conhecimento sobre a tolerância ao estresse hídrico é importante para escolher adequadamente o capim conforme às diversas condições edafoclimáticas. Diante disso, o objetivo com esta pesquisa foi verificar a tolerância de híbridos de Brachiaria spp. ao estresse por déficit hídrico e alagamento. O experimento ocorreu em casa de vegetação, em delineamento experimental inteiramente casualizado, com doze tratamentos, em esquema fatorial 4x3, e três repetições. Os tratamentos adotados foram quatro capins, sendo três híbridos de braquiária (Camello, Cayana, Cayman) e B. humidicola cv. Llanero, que foram submetidos a três condições hídricas (déficit hídrico, sem estresse hídrico e alagamento). As gramíneas foram submetidas ao estresse hídrico por 47 dias e neste período foram realizadas duas avaliações. Para todos os capins, o déficit hídrico acarretou redução no número de perfilhos e o déficit hídrico e o alagamento promoveram redução no número de folhas, com maior impacto para o déficit hídrico. O alagamento não comprometeu a massa de forragem da Brachiaria humidicola cv. Llanero, o que demonstrou a tolerância deste capim a este estresse hídrico. Para todos os híbridos, houve a redução da produção de massa de forragem quando submetidos ao estresse hídrico (déficit e alagamento). O deficit hídrico promoveu menor massa de forragem que o alagamento para todos os híbridos estudados, com exceção do Cayana, que foi afetado de modo igual pelo déficit hídrico e alagamento.  O déficit hídrico reduziu a massa de raízes de todos os capins, enquanto o alagamento reduziu a massa de raízes dos capins Camello e Cayana. Observou-se que a Brachiaria humidicola cv. Llanero e o capim Cayman apresentam maior tolerância ao alagamento, visto que nesta condição não houve redução na massa de raízes. Por isso, nenhum dos híbridos tem tolerância ao déficit hídrico e o Cayman é o híbrido com maior tolerância ao alagamento.
    Type of Medium: Online Resource
    ISSN: 2316-9281
    URL: Article
    DOI: 10.36560/161020231792
    Language: Unknown
    Publisher: Scientific Electronic Archives
    Publication Date: 2023
    detail.hit.zdb_id: 2771824-4
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  • 5
    Online Resource
    Online Resource
    Investigating the Optimal Day for Nitrogen Fertilization on Piatã palisadegrass and Quênia guineagrass after Defoliation
    Sciencedomain International ; 2019
    In:  Journal of Experimental Agriculture International ( 2019-04-23), p. 1-11
    Details
    In: Journal of Experimental Agriculture International, Sciencedomain International, ( 2019-04-23), p. 1-11
    Abstract: Considering that nitrogen is the main macronutrient limiting pasture productivity, the aim of this study was to investigate the most appropriate day for nitrogen fertilization of the grasses Brachiaria brizantha BRS Piatã and Panicum maximum BRS Quênia. The experiment was conducted in a greenhouse in the city of Rondonópolis, located in the state of Mato Grosso, Brazil, using a completely randomized design. The treatments consisted of five nitrogen fertilization periods: 0; 2; 4; 6 and 8 days after defoliation. The dry mass of the leaf blade (DMLB), dry mass of stem + sheath (DMSS), dry mass of residue (DMRES) and root dry mass (RDM) were evaluated. The non-structural carbohydrate of the grass roots was also quantified. The later nitrogen fertilization after defoliation reduced DMLB (P 〈 .01) and DMSS (P 〈 .01) of the BRS Piatã palisadegrass, and DMRES of both grasses (P 〈 .01). Higher levels of water soluble carbohydrates were observed when nitrogen fertilization was performed on grass cutting (day 0). Nitrogen fertilization of the BRS Piatã palisadegrass close the time of defoliation is recommended. For Quênia guineagrass, nitrogen can be applied between the cutting day and the eighth day after defoliation. For the root system, there is a higher content of water soluble carbohydrates in the BRS Piatã palisadegrass and greater accumulation of starch in the BRS Quênia guineagrass.
    Type of Medium: Online Resource
    ISSN: 2457-0591
    URL: Article
    DOI: 10.9734/jeai/2019/v34i630192
    Language: Unknown
    Publisher: Sciencedomain International
    Publication Date: 2019
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  • 6
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    Reactive natural phosphate and nitrogen fertilizers in Marandu grass fertilization
    Lepidus Tecnologia ; 2019
    In:  Comunicata Scientiae Vol. 9, No. 4 ( 2019-01-04), p. 729-736
    Details
    In: Comunicata Scientiae, Lepidus Tecnologia, Vol. 9, No. 4 ( 2019-01-04), p. 729-736
    Abstract: This study aimed to identify a nitrogen fertilizer in order to allow the use of reactive natural phosphate (phosphate rock) in the fertilization of Marandu grass (palisade grass cv. Marandu) in a sandy clayey Oxisol with low phosphorus content. The experiment was performed in a plant nursery at the Federal University of Mato Grosso (UFMT), in a completely randomized experimental design, in a split-plot scheme, with eight replications. The plots consisted of six fertilization treatments of the Marandu grass (Brachiaria brizantha cv. Marandu), divided into four treatments applied after liming and two treatments without liming. Treatments in the presence of liming were: single superphosphate and urea, single superphosphate and ammonium sulfate, urea and reactive natural phosphate, reactive natural phosphate and ammonium sulfate. Treatments without liming were: reactive natural phosphate and urea, reactive natural phosphate and ammonium sulfate. For this experiment, three growth times were evaluated. Ammonium sulfate allows the use of reactive natural phosphate in the fertilization of the Marandu grass even after liming, whilst urea does not provide sufficient acidity.
    Type of Medium: Online Resource
    ISSN: 2177-5133 , 2176-9079
    URL: Article
    DOI: 10.14295/cs.v9i4.1170
    Language: Unknown
    Publisher: Lepidus Tecnologia
    Publication Date: 2019
    detail.hit.zdb_id: 2563565-7
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  • 7
    Online Resource
    Online Resource
    Marandu palisade grass intercropped with densely spaced teak in silvopastoral system
    Universidade Estadual de Londrina ; 2017
    In:  Semina: Ciências Agrárias Vol. 38, No. 4 ( 2017-08-04), p. 2075-
    Details
    In: Semina: Ciências Agrárias, Universidade Estadual de Londrina, Vol. 38, No. 4 ( 2017-08-04), p. 2075-
    Abstract: This study was conducted to evaluate two systems of production: integration between teak and forage (silvopastoral system) and forage only (monoculture). The forage species used was Marandu palisade grass (Urochloa brizantha cv. Marandu). In January 2009, part of the pasture was desiccated and the teak (Tectona grandis) was implemented in a 3 × 4 m spacing arrangement, and at every five rows, a space between rows of 6 m was established, providing a population of 750 trees per hectare. Alongside the development of the trees, the Marandu palisade grass pasture was reestablished. In February 2015, the animals were removed from the experimental area and, in March, the pasture degradation, the density and the mass of tillers was assessed. The following variables were evaluated: sward height; forage mass, percentage of leaf blade, stem+sheath and senescent material; leaf blade:stem+sheath ratio; and live:dead material ratio. The experimental design was completely randomized, with 12 replicates. Treatments consisted of two systems (silvopastoral and monoculture). The total forage accumulation was higher in the monoculture system. The sward height and the percentage of stem+sheath were higher in the integrated system, while the percentage of leaf blade and the leaf blade:stem+sheath ratio were higher in the system exclusively with forage. In conclusion, Marandu palisade grass tolerates shading in a high density spacing silvopastoral system, but the degradation process is more intense compared to grass in monoculture, and the use of Marandu palisade grass in silvopastoral systems changes the forage mass and the structure of the produced forage.
    Type of Medium: Online Resource
    ISSN: 1679-0359 , 1676-546X
    URL: Article
    DOI: 10.5433/1679-0359.2017v38n4p2075
    Language: Unknown
    Publisher: Universidade Estadual de Londrina
    Publication Date: 2017
    detail.hit.zdb_id: 2551446-5
    SSG: 22
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  • 8
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    Online Resource
    Resposta da Brachiaria brizantha cv. Marandu a fertilizantes nitrogenados associados ao fosfato natural reativo
    Lepidus Tecnologia ; 2016
    In:  Comunicata Scientiae Vol. 7, No. 1 ( 2016-05-10), p. 66-
    Details
    In: Comunicata Scientiae, Lepidus Tecnologia, Vol. 7, No. 1 ( 2016-05-10), p. 66-
    Abstract: This study aimed to identify a proportion of urea and ammonium sulfate associated to natural reactive phosphate that coud maximize the production of ‘marandu’ grass in a red clayay oxisol with low phosphorus content. The experiment was conducted in a greenhouse with a completely randomized design , in split plots in the time with seven repetitions. The main plots consisted of six levels of the substitution of urea by ammonium sulfate: 0, 20, 40, 60, 80 and 100%. The split plots consisted of three growth periods, being the first 30 days after plants emergence and the others spaced 20 days after the previous evaluation. The evaluated variables were: number of tillers, SPAD value, shoot, leaf blade and stem dry mass. The ammonium sulfate can provide higher soil acidity when compared to urea, which contributes to the reactive phosphate solubilization. Ammonium sulfate increment changes the SPAD value of ‘marandu’ grass fertilized with natural reactive phosphate.
    Type of Medium: Online Resource
    ISSN: 2177-5133 , 2176-9079
    URL: Article
    DOI: 10.14295/cs.v7i1.964
    Language: Unknown
    Publisher: Lepidus Tecnologia
    Publication Date: 2016
    detail.hit.zdb_id: 2563565-7
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  • 9
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    Online Resource
    Energy to protein ratios in supplements for grazing heifers in the rainy season
    Springer Science and Business Media LLC ; 2019
    In:  Tropical Animal Health and Production Vol. 51, No. 8 ( 2019-11), p. 2395-2403
    Details
    In: Tropical Animal Health and Production, Springer Science and Business Media LLC, Vol. 51, No. 8 ( 2019-11), p. 2395-2403
    Type of Medium: Online Resource
    ISSN: 0049-4747 , 1573-7438
    URL: Article
    DOI: 10.1007/s11250-019-01953-8
    Language: English
    Publisher: Springer Science and Business Media LLC
    Publication Date: 2019
    detail.hit.zdb_id: 2005233-9
    SSG: 22
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  • 10
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    Online Resource
    IMPACTOS TÉCNICO-ECONÔMICOS DA ADUBAÇÃO DE PASTOS
    Nativa ; 2021
    In:  Nativa Vol. 9, No. 2 ( 2021-05-14), p. 173-181
    Details
    In: Nativa, Nativa, Vol. 9, No. 2 ( 2021-05-14), p. 173-181
    Abstract: A criação de bovinos no Brasil ocorre, prioritariamente, em pastagens e, neste contexto, a adubação do pasto é uma importante estratégia de aumento na eficiência produtiva. Diante disso, objetivou-se, com esta revisão, descrever os impactos técnicos da adubação no desenvolvimento de gramíneas tropicais. A calagem é uma prática importante na disponibilidade dos nutrientes e, novos estudos visam demonstrar que o intervalo entre a incorporação do calcário e a semeadura tem maior dependência da umidade do solo e que é possível reduzir este período que tradicionalmente é de 60 a 90 dias. A adubação fosfatada tem maior impacto sobre a implantação do que a manutenção do pasto, e quando negligenciada na formação do pasto, observa-se um efeito residual sobre a rebrota. O nitrogênio e o potássio são os nutrientes mais extraídos na manutenção dos pastos, o que se torna importante o estudo da relação entre estes nutrientes, bem como a adoção da adubação potássica em sistemas em que a adubação nitrogenada é uma prática rotineira. A varredura, que consiste na mistura de sobras de fertilizantes em galpões, embora tenha baixo custo por quilo de produto, o uso pode ser antieconômico, o que depende da composição do insumo adquirido. Palavras-chave: calagem; fertilização de pastos; formação de pastagens.   Technical and economic impacts of pasture fertilization   ABSTRACT: Cattle production on Brazil priority occurs in grasslands, in this context, pasture fertilization is an important strategy to improve production efficiency. Therefore, the aim with this review is to describe the technical impacts of fertilization on tropical grass development. Liming is an important practice in nutrient availability and new studies aim to demonstrate that the interval between limestone incorporation and seeding has more dependence on soil moisture, and that is possible to reduce this period, which traditionally is from 60 to 90 days. Phosphate fertilization has a greater impact on pasture implantation than maintenance, and when neglected in pasture formation, there is a residual effect on regrowth. Nitrogen and potassium are the nutrients extracted on pasture maintenance, which makes it important to study the relationship between these nutrients, as well as the adoption of potassium fertilization in systems where nitrogen fertilization is a routine practice. Mixing leftover fertilizers in warehouses, although it has a low cost per kilo of product, the use can be uneconomical, which depends on the input composition purchased. Keywords: liming; pasture fertilization; pasture implantation.
    Type of Medium: Online Resource
    ISSN: 2318-7670
    URL: Article
    DOI: 10.31413/nativa.v9i2.12047
    Language: Unknown
    Publisher: Nativa
    Publication Date: 2021
    detail.hit.zdb_id: 2746807-0
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