Adubação Nitrogenada Em Capim-Massai: Morfogênese E Produção

Martuscello, Janaína Azevedo; Silva, Randerson Cavalcante; Cunha, Daniel de Noronnha Figueiredo Vieira da; Batista, Ana Catharina dos Santos; Braz, Thiago Gomes dos Santos; Ferreira, Paulo Sérgio Fiúza

doi:10.1590/1089-68916i118730

Cited by 45 publications

(56 citation statements)

References 11 publications

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“…The increase in the DMP of tropical pasture grass plants as a function of increasing doses of N was presented by Martuscello et al (2015) and Cunha et al (2012). According to Fagundes et al (2006), the supply of this nutrient is indispensable in pasture production systems, when N resulting from soil organic matter mineralization is not sufficient Figure 2.…”

Section: Resultsmentioning

confidence: 90%

Nutrient extraction by mombaga grass submitted to sources and doses of nitrogen

Rosado

Gontijo

Passos

et al. 2017

Idesia

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The extraction of nutrients from the soil by plants depends on soil fertility, plant management and plant production. The objective of this study was to evaluate the effect of the application of sources and doses of nitrogen on macronutrient extraction by Panicum maximum cv. Mombaça. The experiment was conducted from 1 October 2011 to 14 April 2012 in the Federal Institute of Espírito Santo, Santa Teresa Campus. The experimental design was a randomised block design with three repetitions in a 3 × 6 factorial scheme, with three nitrogen fertilisers (urea, ammonium sulphate and calcium nitrate) and six nitrogen doses (0, 120, 240, 360, 480 and 600 kg ha -1 ). The established nitrogen doses were divided equally and applied every 28 days after the mombaça grass was cut, resulting in a total of seven applications during the 196-day experimental period. It was observed than nutrient extraction depends on forage plant production and was highest with the higher doses of nitrogen because of the greater dry matter production. The application of high doses of nitrogen in the form of calcium nitrate caused a reduced absorption of magnesium. Nitrogen fertilisation in pastures should be accompanied by the management of other nutrients to avoid nutritional imbalances or the depletion of soil fertility.Key words: Panicum maximum, nitrogen fertilisers, macronutrient absorption, interaction between ions. RESUMEN

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Section: Resultsmentioning

confidence: 90%

Nutrient extraction by mombaga grass submitted to sources and doses of nitrogen

Rosado

Gontijo

Passos

et al. 2017

Idesia

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“…In 1PER, lower LSR values were registered, which might have occurred due to a higher contribution of N at the beginning of 1PER; therefore, plants increased their LER and LAR without the need to translocate N from older leaves to the growing shoots, influencing LSR reductions. However, Masturcello et al (2015) observed a significant increase in LSR as N doses increased. According to these authors, plants facing N scarcity can present low LSR to keep tissues alive as metabolism decreases.…”

Section: As Shown Inmentioning

confidence: 82%

“…Patês et al (2007), studying nitrogen effects on Tanzania grass, observed signifi cant results (0.17 leaves.day -1 ) by applying 100 kg.ha -1 . Additionally, Masturcello et al (2015), assessing the effect of nitrogen doses on massai grass in the northeastern region of Brazil, reported a LAR of 0.8 leaves.tiller -1 for a rate of 80-kg.ha -1 . According to the authors, these inferior results might have occurred due to little rainfall, typical of that region, what directly infl uences plant morphogenesis.…”

Section: Resultsmentioning

confidence: 99%

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Morphogenesis and structure of mombassa grass over different growth periods

Rodrigues

Santos

Silva

et al. 2017

SCA

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This study aimed to evaluate the effect of nitrogen (N) fertilizer doses on morphogenic and structural characteristics of mombassa grass (Panicum maximum Jacq.) at three different periods of the lifespan of tillers. The experiment was conducted in Araguaína-TO, Brazil, from December 2014 to February 2015. It was installed in split plots in a randomized block design with four replications. The doses of N-fertilizer (0, 30, 60, 90 kg N.ha -1 ) were the plots and the periods evaluated (1PER -first period from day 16 to 30; 2PER from day 31 to 45 and 3PER from day 46 to 60 after germination) were the subplots. The evaluated variables consisted of leaf appearance rate (LAR), leaf elongation rate (LER), stem elongation rate (SER), leaf senescence rate (LSR), phyllochron, tiller number, leaf emergence, and total leaf number. A Pearson correlation analysis was used to morphogenic and structural characteristics along with a regression analysis for all the variables. Overall, increasing N-fertilizer doses positively influenced the leaf appearance and leaf elongation rates, tiller density, and the number of live leaves per tiller. The 90-kg N.ha -1 dose enabled the best morphogenic and structural responses of the forage when compared to the other rates. Each period featured differently, with higher values of LSR, SER, and LER in 3PER when compared to those in 2PER and in 1PER. Therefore, the nutritional supply over the first weeks of tiller lives was defining to an increase in forage production in the remaining periods. In light of this, we observed that as LAR raise in the first days after germination, nutritional supplies are required from day 15 on, mainly nitrogen, so plants could continue their development since initial plant growth determines pasture productive vigor and longevity. Key words: leaf appearance; tiller; (Panicum maximum Jacq.); growth period. ResumoObjetivou-se avaliar o efeito de doses de N-fertilizante sobre as características morfogênicas e estruturais no período de estabelecimento do capim-mombaça (Panicum maximum Jacq.) em três períodos da vida do perfilho. O experimento conduzido em Araguaína-TO de dezembro de 2014 a fevereiro de 2015, foi instalado em parcelas subdivididas em um delineamento de blocos casualizados, com quatro repetições, sendo as doses de N-fertilizante (0, 30, 60 e 90 kg N.ha -1 ) a parcela e os períodos avaliados (1°PER-primeiro período do 16º ao 30º; 2°PER-segundo período do 31º ao 45º e 3°PER-terceiro período do 46º ao 60º dia pós germinação) a subparcela. Avaliou-se a taxa de aparecimento foliar (TApF), taxa de alongamento foliar (TAlF) e colmo (TAlC), taxa de senescência foliar (TSF), filocrono, número de perfilhos, surgimento de folhas e o número de folhas totais. Foi utilizada uma análise de correlação de Pearson entre as características morfogênicas e estruturais e, também, análise de regressão para todas as variáveis avaliadas. O incremento das doses de nitrogênio influenciou positivamente as taxas de aparecimento foliar, alongamento foliar, densidade de perfi...

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“…Martuscello et al (2015) reported a high potential response to nitrogen fertilization in Massai grass. However, increased forage production may be limited by low base saturation, when not corrected by liming.…”

Section: Key-wordsmentioning

confidence: 99%

Effect of nitrogen and lime on Massai grass subjected to intensive cutting

Cardoso

Volpe

Macedo

2016

Pesqui. Agropecu. Trop.

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Soil acidity and lack of nitrogen fertilization limit the yield of forage grasses. This study aimed at evaluating the effects of lime (0 kg ha-1; 2,000 kg ha-1; 4,000 kg ha-1; and 8,000 kg ha-1) and nitrogen (0 kg ha-1, 20 kg ha-1, 40 kg ha-1, 80 kg ha-1 and 160 kg ha-1) doses on forage accumulation, soil chemical properties and macronutrient concentrations in leaf blades of Massai grass (Panicum maximum cv. Massai). A randomized blocks design in a 4 x 5 factorial scheme, with four replications, was used. Lime and nitrogen doses positively affected the accumulation of green dry mass in the Massai grass as well as the base saturation in the soil. The maximum yield was obtained at nitrogen doses close to 587 kg ha-1 year-1 for nitrogen and 5,796 kg ha-1 for lime, which produced the greatest accumulation of green dry mass (15,267 kg ha-1 year-1) in the first year of assessment. The demand for lime increased from the first to the second year. Lime increased the base saturation, whereas nitrogen reduced it. The nitrogen applied to the soil raised the nitrogen, magnesium and calcium contents (g kg-1) in the leaf blades of Massai grass. Thus, Massai grass reacted positively to nitrogen and lime doses, with significant effects on the accumulation of green dry mass and soil characteristics assessed.

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Adubação Nitrogenada Em Capim-Massai: Morfogênese E Produção

Cited by 45 publications

References 11 publications

Nutrient extraction by mombaga grass submitted to sources and doses of nitrogen

Nutrient extraction by mombaga grass submitted to sources and doses of nitrogen

Morphogenesis and structure of mombassa grass over different growth periods

Effect of nitrogen and lime on Massai grass subjected to intensive cutting

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