2007
DOI: 10.1590/s0100-204x2007000900008
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Abstract: Resumo -O objetivo deste trabalho foi avaliar o acúmulo e a liberação de nutrientes (N, P, K, Ca, Mg e S) de resíduos culturais de plantas de cobertura na entressafra, em condições de Cerrado. O experimento foi conduzido em um Latossolo Vermelho distroférrico com textura argilosa. As plantas de cobertura avaliadas foram: amaranto (Amaranthus cruentus L.), milheto (Pennisetum glaucum L.) e capim-pé-de-galinha (Eleusine coracana (L.) Gaertn.). O delineamento experimental utilizado foi o de blocos ao acaso, no es… Show more

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Cited by 127 publications
(161 citation statements)
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“…Results for black oat and triticale differed, i.e., the highest N dose (200 mg dm -3 ) for triticale and the calculated dose of 140 mg dm -3 of N for black oat increased N content and decreased C/N ratios of the straw (Figures 2 and 5). In an experiment using litter bags, N release from Amaranthus cruentus (C 3 ) was faster than than from Pennisetum glaucum and Eleusine coracana (C 4 ), which confirms our results (Boer et al, 2007). Therefore, in systems where these C 3 grasses are grown, at least part of the fertilizer N to be applied to the cash crop could be applied to the cover crops, which would recycle the N to the soil faster than C 4 species.…”
Section: Discussionsupporting
confidence: 86%
See 1 more Smart Citation
“…Results for black oat and triticale differed, i.e., the highest N dose (200 mg dm -3 ) for triticale and the calculated dose of 140 mg dm -3 of N for black oat increased N content and decreased C/N ratios of the straw (Figures 2 and 5). In an experiment using litter bags, N release from Amaranthus cruentus (C 3 ) was faster than than from Pennisetum glaucum and Eleusine coracana (C 4 ), which confirms our results (Boer et al, 2007). Therefore, in systems where these C 3 grasses are grown, at least part of the fertilizer N to be applied to the cash crop could be applied to the cover crops, which would recycle the N to the soil faster than C 4 species.…”
Section: Discussionsupporting
confidence: 86%
“…Usually, plant residues can be classified in two groups; fast and slow decomposition types, i.e., residues with C/N ratios higher than 25 strongly immobilize N and have a low decomposition rate; and on the contrary, C/N ratios below 25 indicate high N mineralization rate and fast plant residue decomposition (Boer et al, 2007). Generally, the higher the N rate, the lower the C/N ratio observed in the plant residues, which decreased from 36 to 23, 35 to 19, 24 to 11 and 28 to 10 for millet, congo grass, triticale and black oat, respectively.…”
Section: Discussionmentioning
confidence: 99%
“…Diversas espécies vegetais podem ser utilizadas como culturas de entressafra (cultivadas no outono/ inverno) com o objetivo específico de proporcionar cobertura do solo e reciclagem de nutrientes (Boer et al, 2007;Torres et al, 2008;Pacheco et al, 2011). O cultivo de leguminosas tem demonstrado ser uma alternativa promissora na suplementação de N para as culturas em sucessão (Amado et al, 2003;Sisti et al, 2004), devido à capacidade de fixação do N 2 atmosférico e à estreita relação carbono:nitrogênio (C:N) de seus resíduos, o que leva a uma rápida decomposição , disponibilizando ao solo, aos microrganismos e às plantas em sucessão, além do N e do C acumulados (Mulvaney et al, 2010), todos os nutrientes contidos na biomassa.…”
Section: Introductionunclassified
“…The persistence of shoot dry matter (SDM) on the soil, the nutrient recycling capacity, the mobilization of leached or not very soluble elements and their release to the subsequent crop are important indicators of the quality of cover crops (Boer et al, 2007;Crusciol & Soratto, 2007;Carneiro et al, 2008;Crusciol et al, 2005;Leite et al, 2010). Thus, it is not easy to unite all the aforementioned qualities in a single species, which should also increase the diversification in crop rotations or intercropping, providing soil protection and nutrient recycling in the no-tillage planting system under different soil and climatic conditions.…”
Section: Introductionmentioning
confidence: 99%
“…In the grain-producing regions of Brazil, characterized by dry winters, the grass species pearl millet (Pennisetum glaucum (L.) R. Brown) is the most commonly used cover species (Boer et al, 2007). This crop is characterized by high SDM production and persistence on the soil after desiccation (Silva et al, 2010) and high soil nutrient extraction capacity, with additional advantages in nutrient recycling, especially N and K, reducing the risk of losses through leaching (Crusciol & Soratto, 2009).…”
Section: Introductionmentioning
confidence: 99%