Análise de crescimento do capim-elefante 'Napier' adubado e irrigado

Andrade, A. C.; Fonseca, Dilermando Miranda da; Lopes, Rogério dos Santos; Júnior, Domicio do Nascimento; Cecon, Paulo Roberto; Queiroz, Domingos Sávio; Pereira, D. H.; Reis, Sidnei Tavares dos

doi:10.1590/s1413-70542005000200020

Cited by 26 publications

(32 citation statements)

References 6 publications

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“…According to Ferrari Júnior & Lavezzo (2001) and Queiroz Filho (1998, the shorter the time between cuts, the greater is the proportion of leaves in the produced biomass. In the case of animal feeding forage, silage or grazing, the recommendation is the short-time cutting intervals (1 to 2 months), which also end up with a plant material with increased protein levels (Andrade et al, 2005;Fagundes et al, 2007). For energy purposes, however, the strategy should be the opposite, as fi brous and low protein plant materials promote the most effi cient heat production.…”

Section: Resultsmentioning

confidence: 99%

“…The contents of acid detergent fi bre (ADF) were not infl uenced by soil type, and all genotypes showed levels above 40% (Table 6). In studies with elephant grass grown for fodder purposes, the fi bre content of the whole plant increases and protein content decreases, the longer the plant remains in the fi eld (Andrade et al, 2005). The levels of fi bre in the present study were similar to those reported by Savioli et al (2000) and Campos et al (2002), which recorded values close to 42%, and by Queiroz Filho et al (2000), which reported values up to 48%, for plants growing for 100 days in the fi eld.…”

Section: Resultsmentioning

confidence: 99%

“…At planting, P and K fertilizer were applied in the furrows at a rate of 150 kg ha -1 of K 2 O (KCl) and 100 kg ha -1 of P 2 O 5 (single superphosphate), and 60 kg ha -1 of FTE BR-12. The doses of P, K and micronutrients were applied based on a mean accumulation of these nutrients in elephant grass plants (Andrade et al, 2005;Moreira et al, 2006). No lime application was required (Table 1).…”

Section: Methodsmentioning

confidence: 99%

“…is highly effi cient in fi xing atmospheric CO 2 , being capable of accumulating more than 60 Mg ha -1 of dry matter per year, when under optimal conditions for growth, at high fertilization rates, especially with N, and good water availability (Andrade et al, 2005). Botrel et al (2000) tested several clones of elephant grass, among which Cameroon, CNPGL 91 F27-01 and CNPGL 91 F06-3.…”

Section: Introductionmentioning

confidence: 99%

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Elephant grass genotypes for bioenergy production by direct biomass combustion

Morais

Souza

Leite

et al. 2009

Pesq. agropec. bras.

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-The objective of this work was to evaluate elephant grass (Pennisetum purpureum Schum.) genotypes for bioenergy production by direct biomass combustion. Five elephant grass genotypes grown in two different soil types, both of low fertility, were evaluated. The experiment was carried out at Embrapa Agrobiologia fi eld station in Seropédica, RJ, Brazil. The design was in randomized complete blocks, with split plots and four replicates. The genotypes studied were Cameroon, Bag 02, Gramafante, Roxo and CNPGL F06-3. Evaluations were made for biomass production, total biomass nitrogen, biomass nitrogen from biological fi xation, carbon/ nitrogen and stem/leaf ratios, and contents of fi ber, lignin, cellulose and ash. The dry matter yields ranged from 45 to 67 Mg ha -1 . Genotype Roxo had the lowest yield and genotypes Bag 02 and Cameroon had the highest ones. The biomass nitrogen accumulation varied from 240 to 343 kg ha -1. The plant nitrogen from biological fi xation was 51% in average. The carbon/nitrogen and stem/leaf ratios and the contents of fi ber, lignin, cellulose and ash did not vary among the genotypes. The fi ve genotypes are suitable for energy production through combustion.Index terms: Pennisetum purpureum, ash, agroenergy, biological nitrogen fi xation, genotype, lignin. Genótipos de capim-elefante para produção de bioenergia por combustão direta da biomassaResumo -O objetivo deste trabalho foi avaliar genótipos de capim-elefante (Pennisetum purpureum Schum.) quanto ao potencial para a produção de bioenergia por combustão direta da biomassa. Avaliaram-se cinco genótipos de capim-elefante, em dois solos com baixa fertilidade. Os experimentos foram conduzidos na estação experimental da Embrapa Agrobiologia, em Seropédica, RJ. O delineamento experimental foi o de blocos ao acaso, em parcelas subdivididas, com quatro repetições. Os genótipos estudados foram Cameroon, Bag 02, Gramafante, Roxo e CNPGL F06-3. Determinaram-se a produção de biomassa, o acúmulo de nitrogênio na biomassa, o nitrogênio da biomassa proveniente da fi xação biológica, as relações carbono/nitrogênio e talo/ folha, e os teores de fi bra, lignina, celulose e cinzas da biomassa. A produção de matéria seca variou de 45 a 67 Mg ha -1 . A menor produção foi do genótipo Roxo, e as maiores, dos genótipos Bag 02 e Cameroon. O nitrogênio total acumulado na matéria seca variou de 240 a 343 kg ha -1 . Em média, 51% do nitrogênio foram provenientes da fi xação biológica. As relações carbono/nitrogênio e talo/folha e os conteúdos de fi bra, lignina, celulose e cinzas não variaram entre os genótipos. Os cinco genótipos constituem materiais adequados para produção de energia pela queima.Termos para indexação: Pennisetum purpureum, cinzas, agroenergia, fi xação biológica do nitrogênio, genótipo, lignina.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Elephant grass genotypes for bioenergy production by direct biomass combustion

Morais

Souza

Leite

et al. 2009

Pesq. agropec. bras.

View full text Add to dashboard Cite

show abstract

“…Conforme Gomide (1997), a variação na AFE contribui indiretamente, via interceptação de luz, para o crescimento da planta, enquanto a variação na RMF tem efeito direto na produção de massa seca. Andrade et al (2002) atribuem os decréscimos na RAF ao investimento de fotoassimilados para o desenvolvimento de órgãos não fotossintetizantes, como colmos, bainhas e raízes, tornando a planta mais ineficiente, já que a massa total aumenta e a superfície fotossintetizante varia pouco.…”

Section: Methodsunclassified