Nutrientes na fitomassa de capim-marandu em função de fontes e doses de nitrogênio

Primavesi, A. C.; Primavesi, O.; Corrêa, L. de A.; Silva, Aliomar Gabriel da; Cantarella, Heitor

doi:10.1590/s1413-70542006000300024

Cited by 86 publications

(105 citation statements)

References 9 publications

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“…This confirms the high K recycling capacity of grasses and their potential use as cover crops (Raij et al 1997). Lower K contents and accumulation in signalgrass were obtained by Primavesi et al (2006). Jack bean and pearl millet showed the lowest K contents (Table 2); however, due to great dry matter production, jack bean had higher accumulated values of K than sunn hemp and pearl millet, differing from values described in the literature.…”

Section: Discussionmentioning

confidence: 62%

Grasses and legumes as cover crop in no-tillage system in northeastern Pará Brazil

et al. 2014

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Studies to select one or more species of coverage plants adapted to Amazonian soil and climate conditions of the Amazon are a promising strategy for the improvement of environmental quality, establishing no-till agricultural systems, and thereby reducing the impacts of monoculture farming. The aim of this study was to assess the persistence time, half-life time, macronutrient content and accumulation, and C:N ratio of straw coverage in a Ultisol in northeastern Pará. Experimental design was randomized blocks with five treatments and five replicates. Plants were harvested after 105 days, growth and biomass production was quantified. After 84 days, soil coverage was 97, 85, 52, 50, and 15% for signalgrass (Brachiaria brizantha) (syn. Urochloa), dense crowngrass (Panicum purpurascens), jack bean (Canavalia ensiformes), pearl millet (Pennisetum americanum) and sunn hemp (Crotalaria juncea,), respectively. Signalgrass yielded the greatest dry matter production (9,696 kg ha -1 ). It also had high C:N ratio (38.4), long half-life (86.5 days) and a high persistence in the field. Jack bean also showed high dry matter production (8,950 kg ha -1 ), but it had low C:N ratio (17.4) and lower half-life time (39 days) than the grasses. These attributes indicate that signalgrass and jack bean have a high potential for use as cover plants in no-till agricultural systems in the State of Pará. KEYWORDS: Half-life, persistence of plant biomass, recycling nutrients, C / N ratio Gramíneas e leguminosas como plantas de cobertura para o sistema de plantio direto no nordeste do estado do Pará RESUMO Estudos que visem à seleção de espécies, ou de grupos de espécies de plantas de cobertura do solo adaptadas as condições edafoclimáticas amazônicas parece ser uma estratégia viável para a melhoria da qualidade ambiental por propiciar o estabelecimento do SPD atenuando problemas relacionados ao monocultivo. O objetivo foi avaliar o comportamento de plantas de cobertura, no Nordeste paraense, quanto a persistência, tempo de meia vida, teor e acúmulo de macronutrientes e relação C/N na palhada, em Argissolo Vermelho Amarelo. O delineamento experimental foi em blocos ao acaso, com cinco tratamentos e cinco repetições. As plantas foram cultivadas a partir do mês de julho e cortadas aos 105 dias de cultivo e então foi feita a avaliação da produção. Ao final dos 84 dias a percentagem de cobertura do solo correspondeu a 97, 85, 52, 50 e 15%, para a braquiária (Brachiaria brizantha) (syn. Urochloa), capim colônia (Panicum purpurascens), feijão de porco (Canavalia ensiformes), milheto (Pennisetum americanum) e crotalária (Crotalaria juncea,), respectivamente. A braquiária apresentou maior produção de matéria seca (9.696 kg ha -1 ), elevada relação C/N (38,4), alto tempo de meia vida (86,5 dias) e grande persistência no campo. O feijão de porco apresentou alta produção de matéria seca (8.950 kg ha -1 ), porém menor relação C/N (17,4) e tempo de meia vida (39 dias), quando comparada as gramíneas. Por estas características, a braquiária e o feijã...

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Section: Discussionmentioning

confidence: 62%

Grasses and legumes as cover crop in no-tillage system in northeastern Pará Brazil

et al. 2014

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“…The maximum content of leaf nitrogen found by Lavres Júnior & Monteiro (2002) Primavesi et al (2006), working with Marandu grass (Brachiaria brizantha), found nitrogen contents ranging from 17 to 24 g kg -1 . Nevertheless, for Piatã grass, in the present study, it was found content of up to 34 g kg -1 in the first cut, showing a higher nutritional potential, when the nitrogen fertilization is handled properly.…”

Section: Resultsmentioning

confidence: 91%

“…Primavesi et al (2006), using a combination of nitrogen and potassium fertilization on Marandu grass observed that potassium contents ranged from 28 to 35 g kg -1 .…”

Section: Resultsmentioning

confidence: 99%

Nitrogen and potassium in the cultivation of Piatã grass in Brazilian Cerrado soil

Morais

Bonfim-Silva

Pacheco

et al. 2016

Rev. bras. eng. agríc. ambient.

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A B S T R A C TThis study aimed to evaluate the production and mineral nutrition of Piatã grass as a function of nitrogen and potassium fertilization in Oxisol collected in the Cerrado. The experiment was carried out in a greenhouse, the experimental design was completely randomized, in a 5 x 5 factorial scheme, corresponding to five nitrogen doses (0, 100, 200, 300 and 400 mg dm -3 of N) and five potassium doses (0, 90, 180, 270 and 360 mg dm -3 of K 2 O), with four replicates. Three cuts of the shoots were performed every 30 days. Chlorophyll index, dry mass of shoots and roots, and nitrogen and potassium contents in the leaves were evaluated. The dry mass of shoots showed interaction between nitrogen and potassium in the three cuts; in the second and third cuts, it had maximum production at the nitrogen and potassium doses of 254 and 158 mg dm -3 , in the second, and 250 and 306 mg dm -3 in the third, respectively. The nitrogen and potassium contents are influenced as a function of nitrogen and potassium fertilization isolated by factor. The nitrogen and potassium ratio in the Piatã grass crop was around 1:1.Nitrogênio e potássio no cultivo do capim-piatã em solo do Cerrado brasileiro R E S U M O Objetivou-se avaliar a produção e a nutrição mineral do capim piatã em função da adubação nitrogenada e potássica em Latossolo Vermelho coletado no Cerrado. Realizouse o experimento em casa de vegetação, o delineamento experimental foi inteiramente casualizado em esquema fatorial de 5 x 5 sendo cinco doses de nitrogênio (0, 100, 200, 300 e 400 mg dm -3 ) e cinco doses de potássio (0, 90, 180, 270 e 360 mg dm -3 ), com quatro repetições. Realizaram-se três cortes da parte aérea a cada 30 dias. Foram avaliados o índice de clorofila, a massa seca da parte aérea e das raízes, a concentração de nitrogênio e de potássio, nas folhas. A massa seca da parte aérea apresentou interação entre o nitrogênio e o potássio nos três cortes sendo que no segundo e no terceiro apresentou máxima produção nas doses de nitrogênio e potássio, de 254 e 158 mg dm -3 no segundo e de 250 e 306 mg dm -3 no terceiro, respectivamente. As doses de nitrogênio e de potássio apresentaram interação significativa para a massa seca da parte aérea do capim piatã, nos três cortes. As concentrações de nitrogênio e potássio são influenciadas em função da adubação nitrogenada e potássica isolada por fator. A relação de nitrogênio e potássio no capim piatã é de 1:1. Key words:Brachiaria brizantha nitrogen content potassium content N:K ratio in plants Palavras-chave: Brachiaria brizantha concentração de nitrogênio concentração de potássio relação N:K nas plantas

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“…Lana et al (2010) observed contents of 2.80 g kg -1 for Mg and 4.12 g kg -1 for Ca with mineral fertilization in the second cut, which were significant compared with highest dose of poultry manure applied. Primavesi et al (2006) observed that Ca contents in the dry matter of Marandu grass increased, although slightly, with fertilization using ammonium nitrate.…”

Section: Resultsmentioning

confidence: 95%

“…Silva et al (2013) found linear adjustment and K content of 17.72 g kg -1 for the treatment with 20 t ha -1 of poultry manure. According to Primavesi et al (2006) and Costa et al (2009), these low K contents may be associated with the large K extraction by Marandu grass with high forage production.…”

Section: Resultsmentioning

confidence: 99%

Productive and chemical characteristics of Marandu grass in response to poultry manure and soil chiseling

Eguchi

Cecato

Muniz

et al. 2015

Rev. bras. eng. agríc. ambient.

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The objective of this study was to evaluate the productive and chemical characteristics of Marandu grass fertilized with poultry manure with or without the use of soil chiseling, during a period of 210 days. The experiment was conducted in a Dark-Red Latosol (Haplustox) of sandy texture, in a randomized block design with 4 replicates, in a 6 x 2 factorial scheme (0, 1.037, 2.074, 4.148, 6.222 t ha-1 of poultry manure and an additional treatment with chemical fertilizer based on 2.074 t ha-1, with and without soil chiseling). Grass-cutting management was performed between 95% of light interception by the canopy and the residual height of 0.15 m. The application of poultry manure resulted in an increase of forage production with higher number of cuts (NC). A linear model described the effect of the applied manure doses on dry matter accumulation (DMA), stems + sheaths (SS) and dead material (DM). There was significant interaction between manure doses and soil managements for leaf blade (LB), with greater variations in the treatment without soil chiseling. For plant chemical evaluation, a negative effect of poultry manure was observed on the contents of Ca, Mg, N, S, Mn and Zn, which may be due to the increased number of cuts. Poultry manure positively changed the production of Marandu grass.

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Nutrientes na fitomassa de capim-marandu em função de fontes e doses de nitrogênio

Cited by 86 publications

References 9 publications

Grasses and legumes as cover crop in no-tillage system in northeastern Pará Brazil

Grasses and legumes as cover crop in no-tillage system in northeastern Pará Brazil

Nitrogen and potassium in the cultivation of Piatã grass in Brazilian Cerrado soil

Productive and chemical characteristics of Marandu grass in response to poultry manure and soil chiseling

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