Estudo metanalítico da resposta de gramíneas perenes de verão à adubação nitrogenada

Bernardi, A.; Silva, A.W.L.; Baretta, Dilmar

doi:10.1590/1678-4162-9501

Cited by 14 publications

(13 citation statements)

References 23 publications

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“…Forage accumulation rates were 58.1%, 54.3%, and 47.2% lower for the residual doses of 100, 200 and 300 kg ha -1 of N, respectively than the values observed by Barbosa (2018) in 2017, when the pastures received the doses of N. The lower FAR can be explained by the direct effect of N fertilization on the forage plant, since the nutrient is responsible for significant increases in forage production (5,9). Pastures under the residual dose of 100 kg ha -1 of N, presented a pre-grazing FM close to the 3000 kg ha -1 of DMM observed in a study by Brâncio et al (2003a).…”

Section: Resultsmentioning

confidence: 61%

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The effect of residual nitrogen fertilization on the yield components, forage quality, and performance of beef cattle fed on Mombaça grass

et al. 2021

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The objective of this study was to evaluate the effect of residual nitrogen (N) on pastures of Mombaça grass and its impact on pasture structure and the nutritive value and performance of beef cattle. The experiment analyzed randomized blocks subdivided into plots, with three replications. The research focused on a number of pastures having received three annual doses of N (100, 200 and 300 kg ha-1) from 2015 to 2017, with no N fertilization in 2018. The results indicated that pastures under residual effect of 300 kg ha-1 of N were characterized by higher (P<0.05) rates of forage accumulation than those under the residual effect of 100 kg ha-1 N. Furthermore, this study indicated no effect (P>0.05) on the pasture nutritive value and average daily gain (0.490 kg day-1). The stocking rate was higher (P<0.05) in pastures under the residual effect of 300 kg ha-1 of N, and lower in those at 100 kg ha-1 of N, while weight gain per area followed the trend observed in the stocking rate. The results thus suggest that the suspension of N fertilization for one year after three years of sequential fertilization was responsible for an immediate loss of 50 and 55% of the productivity of plants and animals, respectively. Highlights: Fundamental nitrogen fertilization to ensure pasture productivity. The use of nitrogen fertilization has been limited by cost, due to the extension of the areas involved and the need for frequent applications. We suspended nitrogen fertilization for one year after using the same doses of nitrogen for three years in order to evaluate a possible residual effect on plant and animal production. Suspending the N fertilization of Mombaça grass for one year after three years of sequential fertilization with the same doses leaves a residual effect on the pasture structure and performance of beef cattle. The suspension of nitrogen fertilization reduces the rate of forage accumulation by an average of 50%, causing a 55% reduction in animal productivity.

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Section: Resultsmentioning

confidence: 61%

“…The individual performance depends on the genetic potential of the animal (19) and the quantity, quality, and form of forage that it is fed (15). Also, the N fertilization promotes increases in forage accumulation (5), altering pasture dynamics (20,28) with direct reflexes in animal and per area production (16).…”

Section: Introductionmentioning

confidence: 99%

The effect of residual nitrogen fertilization on the yield components, forage quality, and performance of beef cattle fed on Mombaça grass

et al. 2021

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“…Pode-se observar efeito significativo das doses de nitrogênio na produção de matéria seca, em que as maiores doses de adubação nitrogenada resultaram em maior produção. Esse resultado era esperado visto que as gramíneas respondem bem a adubação nitrogenada, fato que têm sido amplamente demonstrado na literatura (BERNARDI et al, 2018).…”

Section: Resultsunclassified

“…O aumento na produção de matéria seca em função da adubação nitrogenada se justifica devido o N ser o componente responsável por várias reações, além de fazer parte da clorofila, de enzimas e proteínas, auxilia na formação e crescimento radicular, na fotossíntese e na translocação de fotoassimilados para o crescimento foliar. Além disso, o N é considerado o elemento mais demandado pelas gramíneas, o qual promove a aceleração na formação e crescimento de novas lâminas foliares e atua no aumento do vigor de rebrotação, o que contribui para melhorar a recuperação da planta após o corte (GALINDO et al, 2017;MARTUSCELLO et al, 2018;ROSADO et al, 2017;BERNARDI et al, 2018).…”

Section: Resultsunclassified

Desenvolvimento e produção do capim BRS quênia submetido a doses de adubação nitrogenada

Silva¹,

Heidrich²,

Silva³

et al. 2019

Rev Agr Acad

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________________________________________________________________________________ ResumoO objetivo deste trabalho foi avaliar o crescimento e a produtividade do capim BRS Quênia (Panicum maximum) submetido à adubação nitrogenada em Alta Floresta, MT. As maiores produções de matéria seca ocorreram nas doses de 150 e 300 kg ha -1 de N. Observou-se a ocorrência de cigarrinha-verde (Empoasca kraemeri) no período final do experimento. O capim BRS Quênia, nas condições do experimento, apresentou alta resposta à adubação nitrogenada, sendo recomendada a dose de 150 kg de N ha -1 . Sugere-se mais estudos para verificar a suscetibilidade do capim BRS Quênia à cigarrinha-verde (E. Kraemeri) e identificar as melhores condições para o máximo desempenho dessa forrageira na região. AbstractThe objective of this work was to evaluate the growth and productivity of BRS Quênia grass (Panicum maximum) submitted to nitrogen fertilization in Alta Floresta, MT. The highest dry matter yields occurred at doses 150 and 300 kg ha -1 . It was observed the occurrence of green leafhopper (Empoasca kraemeri) in the final period of the experiment. The BRS Quênia grass, under the conditions of the experiment, presented a high response to nitrogen fertilization. The dose of 150 kg of N ha -1 is recommended. Further studies are suggested to verify the susceptibility of BRS Quênia grass under the occurrence of the green leafhopper (E. kraemeri) and to identify the best conditions for the maximum performance of this forage in the region.

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“…The relatively low CP content of capim-de-raiz in comparison with the other species studied can be explained by the different types of soil in which the samples were grown. In addition, CP content is directly affected by plant age (Cedeño et al, 2003) and fertilization, particularly with nitrogen (Bernardi et al, 2018).…”

Section: Discussionmentioning

confidence: 99%

Nutrient digestibility in horses of tropical grasses found in semi-arid areas of the Brazilian Northeast region assessed using mobile bags

Silva¹,

Lucena²,

Santiago³

et al. 2021

Revista Brasileira De Zootecnia

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The present study used mobile bags to estimate horse nutrient digestibility of tropical grasses found in semi-arid areas of the Brazilian Northeast region. Five female mixed-breed horses with a mean weight of 400±23 kg were assigned to a 5×5 Latin square design with five periods of seven days and five grasses: Tifton 85 hay (Cynodon spp.), sixweeks threeawn (Aristida adscensionis Linn.), Alexandergrass (Brachiaria plantaginea (Link) Hitchc), capim-de-raiz (Chloris orthonoton Doell), and Sabi grass (Urochloa mosambicensis). The nutrient content of forages was determined prior to inoculation in horses and after recovery of mobile bags from feces. The digestibility coefficients were determined from the difference between the inoculated and recovered material. The dry matter, organic matter, mineral matter, crude protein, neutral detergent fiber, and acid detergent fiber contents of the grass species were analyzed. Digestibility data were subjected to analysis of variance using the Statistical Analysis System (SAS, version 9.0) software. Higher dry matter digestibility coefficients were observed in Tifton 85 (74.61%), Alexandergrass (74.30%), and capim-de-raiz (68.88%) than in sixweeks threeawn (48.40%) and Sabi grass (52.89%). The highest crude protein digestibility coefficients were found for Alexandergrass (95.70%), Tifton 85 (93.50%), and sixweeks threeawn (93.35%). Sixweeks threeawn had lower apparent mineral matter digestibility than the other grasses. The digestibility coefficients of Alexandergrass and capim-de-raiz indicate that those grasses have potential to be used in equine feed.

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Estudo metanalítico da resposta de gramíneas perenes de verão à adubação nitrogenada

Cited by 14 publications

References 23 publications

The effect of residual nitrogen fertilization on the yield components, forage quality, and performance of beef cattle fed on Mombaça grass

The effect of residual nitrogen fertilization on the yield components, forage quality, and performance of beef cattle fed on Mombaça grass

Desenvolvimento e produção do capim BRS quênia submetido a doses de adubação nitrogenada

Nutrient digestibility in horses of tropical grasses found in semi-arid areas of the Brazilian Northeast region assessed using mobile bags

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