Forage quality of native warm-season grasses in response to nitrogen fertilization and harvest date

Waramit, Naroon; Moore, Kenneth J.; Fales, S. L.

doi:10.1016/j.anifeedsci.2012.02.008

Cited by 39 publications

(50 citation statements)

References 23 publications

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“…The high IVDMD value is characteristic of sugarcane because this forage maintains high digestibility, including a slight increase at the end of the vegetative cycle that coincides with maturation. As in the work by Waramit et al (2012), this study also did not find a consistent pattern in the response of the IVDMD to nitrogen fertilization. Thus, it was difficult to draw conclusions regarding the beneficial effect of nitrogen fertilization on the IVDMD.…”

Section: In Vitro Digestibility -1 St and 2 Nd Ratoon Cropsmentioning

confidence: 33%

“…However, considering the requirement for N by sugarcane crops, the N dynamics in the soil, the biochemical processes that involve N assimilation, and the aspects related to the use of nitrogen fertilization, primarily regarding their possible effects on the nutritional quality of sugarcane, must be better clarified; the available studies in literature mostly focus on other tropical forage plants. In the study by Waramit et al (2012) In addition to the possible effect on the nutritional quality of sugarcane, the adequate management of nitrogen fertilization can contribute greatly to the sustainability of agro-ecosystems.…”

Section: Introductionmentioning

confidence: 99%

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Nutritional value of sugarcane varieties in relation to nitrogen fertilization for the pre-Amazon Region of Brazil

Costa

Shigaki

Freitas

et al. 2017

SCA

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This study evaluated the nutritional value of sugarcane varieties in relation to nitrogen fertilization. The varieties studied were RB 863129, RB 867515, and RB 92579, and nitrogen fertilizer was applied at doses of 0, 60, 80, 120, and 140 kg N ha -1 . The experiment was divided into two stages: i) Year I -plant cane, when the yield and nutritional quality of the three sugarcane varieties were evaluated; ii) Years II and III, when and the effect of nitrogen fertilization on the nutritional quality of the first and second ratoon crops of the same varieties was evaluated. In plant cane the yield (t ha -1 ) and DM (dry matter) and CP (crude protein) contents were higher for the RB 863129 variety. There was no difference between the varieties regarding their NDF (neutral detergent fiber) and ADF (acid detergent fiber) contents and IVDMD (in vitro dry matter digestibility). In the first and second ratoon crops, there was a difference between the varieties and fertilizer doses for the evaluated parameters, with the exception of the DM content and IVDMD, which were influenced by the varieties, doses of N, and cutting years. The RB 92579 variety showed the best yield of the two ratoon crops (131 t ha -1 of stems) and the best nutritional parameters (26% ADF, 41% NDF, 2.4% CP, and 69.4% IVDMD). The sugarcane yield and its nutritional quality can be influenced by the cutting year and nitrogen fertilization management system and by the variety type. Key words: In vitro digestibility. Animal nutrition. Saccharum officinarum. ResumoEste estudo avaliou o valor nutritivo de variedades de cana-de-açúcar em função da adubação nitrogenada. As variedades estudadas foram RB 863129, RB 867515 e RB 92579, e as doses nitrogenadas 0, 60, 80, 120 e 140 kg N ha -1 . O experimento foi dividido em duas etapas: i) Ano I -Cana-planta: avaliou-se a produtividade e qualidade nutricional de três variedades de cana-de-açúcar; ii) Anos II e III: avaliou-se a influência da adubação nitrogenada na qualidade nutricional da primeira e segunda soca das mesmas variedades. Na cana-planta foram determinados o teor de Brix e a relação FDN/Brix. Para a cana-planta, a produtividade (t ha -1 ) e os teores de MS e PB, foram superiores (P < 0.05) para a variedade RB 863129. Não houve diferença (P < 0,05) entre as variedades para os teores de FDN e FDA e para a DIVMS. Na primeira e segunda soqueira houve diferença (P < 0,05) entre variedades e doses de adubação para os parâmetros avaliados, com exceção do teor de MS e digestibilidade in vitro, que foram influenciados (P < 0,05) pelas variedades, doses de N e anos de corte. A variedade RB 92579 apresentou nas duas soqueiras a melhor produtividade (131 t ha -1 de colmos), aliada aos melhores parâmetros nutricionais (FDA 26%, FDN 41%, PB 2,4% e DIVMS 69,4%). A produtividade da cana-de-açúcar, assim com a sua qualidade nutricional, pode ser influenciada pelo manejo da adubação nitrogenada, ano de corte e pela variedade. Palavras-chave: Digestibilidade in vitro. Nutrição animal. Saccharum officinarum.

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Section: In Vitro Digestibility -1 St and 2 Nd Ratoon Cropsmentioning

confidence: 33%

Section: Introductionmentioning

confidence: 99%

Nutritional value of sugarcane varieties in relation to nitrogen fertilization for the pre-Amazon Region of Brazil

Costa

Shigaki

Freitas

et al. 2017

SCA

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“…Higher fiber concentrations and lignin observed in C. ciliaris may have contributed to the lowest IVDMD observed during the grazing. Studies have shown that forage grasses at mature stages present lower IVDMD coefficients (Martins-Costa et al, 2008;Waramit et al, 2012), with a negative correlation occurring between digestibility and lignin concentration (Jung & Vogel, 1986). Higher IVDMD on D. pentzii during grazing may be associated with the fact that this grass also presented the lowest NDF.…”

Section: Resultsmentioning

confidence: 99%

“…Keeping warm-season grasses under stockpiled conditions should be carefully analyzed, because high NDF values might be negatively correlated with dry matter intake by ruminants (Arelovich et al, 2008). Waramit et al (2012) considered that the maturity of warm-season grasses is the main factor that affects negatively forage quality, with expected decrements in CP and IVDMD, and increments of NDF.…”

Section: Resultsmentioning

confidence: 99%

Prediction of the nutritional value of grass species in the semiarid region by repeatability analysis

Coêlho

Mello

Santos

et al. 2018

Pesq. agropec. bras.

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-The objective of this work was to estimate the repeatability (r) and the number of samples required to measure the nutritional value of four warm-season forage grasses growing in a semiarid region. The grasses evaluated were Urochloa mosambicensis, Cenchrus ciliaris, Digitaria pentzii, and Megathyrsus maximus. Evaluations occurred under two forage management conditions: stockpiling and grazing. Hand-plucked forage samples were analyzed for dry matter (DM), crude protein (CP), neutral detergent fiber (NDF), acid detergent fiber (ADF), lignin, and in vitro DM digestibility (IVDMD). Four methods were used to estimate r and the number of samples required: analysis of variance, method of principal components based on the covariance (PCCOV) and the correlation (PCCOR) matrices, and structural analysis (EVCOR). Species were compared by the probability of the difference using the t-test. The method PCCOV presents the highest coefficient of repeatability and, therefore, a lower number of samples required. Lignin is the trait that have the highest number of samples required. In terms of qualitative traits, D. pentzii and M. maximus show the best forage qualities among the species evaluated.Index terms: chemical composition, IVDMD, sampling, warm-season grasses. Predição do valor nutricional de gramíneas na região semiárida por meio da análise de repetibilidadeResumo -O objetivo deste trabalho foi estimar a repetibilidade (r) e o número de amostragens necessárias para mensurar o valor nutricional de quatro gramíneas forrageiras tropicais numa região semiárida. As gramíneas avaliadas foram Urochloa mosambicensis, Cenchrus ciliares, Digitaria pentzii e Megathyrsus maximus. As avaliações ocorreram sob duas condições de manejo da forragem: diferimento e pastejo. Amostras de forragem coletadas por pastejo simulado foram analisadas para matéria seca (MS), proteína bruta (PB), fibra em detergente neutro (FDN), fibra em detergente ácido (FDA), lignina e digestibilidade in vitro da MS (DIVMS). Para a análise de r e número de amostragens necessárias, utilizaram-se quatro métodos: análise de variância, componentes principais da matriz de covariância (CPCOV) e de correlação (CPCOR), e análise estrutural (AECOR). As espécies foram comparadas pela probabilidade da diferença, tendo-se utilizado o teste t. Para o método CPCOV, observa-se maior coeficiente de r, portanto, menor número de amostragens necessárias. A lignina é a característica que apresenta o maior número de amostragens necessárias. Em termos qualitativos, D. pentzii e M. maximus mostram melhores características entre as espécies forrageiras avaliadas.Termos para indexação: composição química, DIVMS, amostragem, gramíneas tropicais.

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“…The intercropped alfalfa showed different behaviour between the two switchgrass varieties, probably due the different habit and growing cycle of Alamo, which negatively affected the alfalfa establishment compared with Blackwell. The plentiful yields of switchgrass did not comply with the nutritional values required for quality forage, having a low protein content particularly after boot stage (Rogers et al, 2012;Waramit et al, 2012;Mosali et al, 2013). In fact, Guretzky et al (2010) and Rogers et al (2014) recommended using switchgrass as forage only at vegetative stage, from spring to early summer, and they indicated, in a dual-purpose management, to use the herbage summer regrowth as feedstock biomass for cellulosic industry.…”

Section: Discussionmentioning

confidence: 99%

Alfalfa (Medicago sativa L.) overseeding on mature switchgrass (Panicum virgatum L.) stand: biomass yield and nutritive value after the establishment year

et al. 2016

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Perennial crops can positively act on the environment providing a better inter-annual protection of soil cover from water erosion, limiting soil fertility degradation, the risk of nutrient leaching and the exploitation of water for irrigation. Switchgrass (Panicum virgatum L.), a warm-season grass native from North America, has been cultivated for decades as forage crop and only recently as bioenergy crop. Even if several studies reported a positive effect of nitrogen (N) supply on switchgrass yield and quality, potential indirect and direct environmental risks (e.g., eutrophication and greenhouse gas emission) are related to this practice. For this reason grass-legume intercropping can represent a sustainable practice able to increase biomass yield and quality, and at the same time to improve N use efficiency, soil structure and fertility. Based on this, the aim of this study was to evaluate the suitability of switchgrass to Mediterranean environment as forage crop and to improve biomass yield and its nutritional value by intercropping with alfalfa (Medicago sativa L). During spring 2013, in two switchgrass pure stands (varieties Alamo and Blackwell, respectively), alfalfa was established through direct seeding implementing a split-plot experimental design. Our first year results report a positive effect of the intercropping in increasing the total annual yield of the stand, of about 20% with respect to the pure switchgrass stand. However, the presence of alfalfa negatively affected switchgrass yield in the mixture. In both varieties, the crude protein content was higher in the mixture than in the pure switchgrass stands. Conversely, the neutral detergent fibre content in the mixture was lower than in pure switchgrass. Then, our results show that switchgrass-alfalfa intercropping leads to increase the profitability of grassland-based livestock production.

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Forage quality of native warm-season grasses in response to nitrogen fertilization and harvest date

Cited by 39 publications

References 23 publications

Nutritional value of sugarcane varieties in relation to nitrogen fertilization for the pre-Amazon Region of Brazil

Nutritional value of sugarcane varieties in relation to nitrogen fertilization for the pre-Amazon Region of Brazil

Prediction of the nutritional value of grass species in the semiarid region by repeatability analysis

Alfalfa (Medicago sativa L.) overseeding on mature switchgrass (Panicum virgatum L.) stand: biomass yield and nutritive value after the establishment year

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