Nutrição e produtividade do amendoim em sucessão ao cultivo de plantas de cobertura no sistema plantio direto

Crusciol, Carlos Alexandre Costa; Soratto, Rogério Peres

doi:10.1590/s0100-204x2007001100006

Cited by 30 publications

(25 citation statements)

References 13 publications

(21 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Entre as espécies utilizadas como plantas de cobertura e para adubação verde, duas se destacam: a crotalária (Crotalaria juncea L.), pela boa cobertura do solo proporcionado pelo rápido crescimento, pela associação simbiótica com bactérias fixadoras de N 2 (PERIN; GUERRA; TEIXEIRA, 2003) e supressão de nematóides parasitas (INOMOTO et al, 2008), sendo que essa última característica tem acarretado em grande expansão do cultivo dessa espécie nas áreas de produção de grãos na região do cerrado brasileiro; e o milheto (Pennisetum glaucum (L.) R. Brown), que é caracterizado pela produção de palhada em grande quantidade e com características de maior persistência sobre o solo (BOER et al, 2008;SILVA et al, 2010), pela alta capacidade de extração de nutrientes do solo, com amplas vantagens de reciclagem, principalmente N e K, reduzindo os riscos de lixiviação (ROSOLEM;PACE;CRUSCIOL, 2004;CRUSCIOL;SORATTO, 2007SORATTO, , 2009LEITE et al, 2010).…”

Section: Introductionunclassified

Persistência e liberação de elementos da fitomassa do consórcio crotalária com milheto sob fragmentação

Costa¹,

Crusciol²,

Soratto³

et al. 2014

Rev. Ciênc. Agron.

Self Cite

View full text Add to dashboard Cite

RESUMO -Objetivou-se, com esse trabalho, avaliar a taxa de decomposição e a velocidade de liberação de macronutrientes e Si da fitomassa do consórcio crotalária mais milheto, em função do tempo após manejo, sem e com fragmentação. O experimento foi conduzido em condições de campo, em Botucatu-SP. O delineamento experimental foi de blocos casualizados, com quatro repetições, em esquema fatorial constituído por dois manejos da fitomassa da parte aérea (sem e com fragmentação mecânica) e seis épocas de coleta [0; 18; 32; 46; 74 e 91 dias após manejo (DAM)]. Foram determinadas a massa de matéria seca, teor de macronutrientes e Si e quantidade dos nutrientes remanescentes. Os dados foram submetidos à análise de variância, as médias dos tratamentos do fator manejo comparadas pelo teste de t (LSD) a 5% e do fator épocas de coletas ajustados a equações matemáticas. A fragmentação da fitomassa aumenta a taxa de decomposição e a liberação de N, P, Ca e S. O K é rapidamente disponibilizado, restando 91 DAM, em média, 1,5% da quantidade total acumulada. Aos 91 DAM pelo menos 80% de todos os macronutrientes já haviam sido liberados ao solo. A máxima liberação diária dos macronutrientes ocorre entre 0 a 18 DAM. A taxa de liberação de Si é constante e ocorre aumento do teor do elemento na fitomassa com o tempo devido à acentuada liberação de C. O Si é o elemento liberado mais lentamente ao solo, restando ainda 91 DAM, em média, 85% da quantidade total acumulada na fitomassa. Palavras-chave:Crotalaria juncea. Milheto. Palha-utilização na agricultura. Cultivo consorciado.ABSTRACT -The objective of this work was to evaluate the rate of decomposition and rate of release of macronutrients and Si in the biomass from intercropped sunn hemp and millet, as a function of time after management, both with and without fragmentation. The experiment was conducted under field conditions in Botucatu, São Paulo. The experimental design was of randomized blocks with four replications, in a factorial design consisting of two managements of shoot phytomass (with and without mechanical fragmentation) at six harvesting times [0, 18, 32, 46, 74 and 91 days after management (DAM)]. The dry-matter weight, macronutrient and Si content, and quantity of remaining nutrients were determined. The data were subjected to variance analysis, the averages of the factor management treatments were compared by t-test (LSD) at 5%, and those of the factor sampling-times, adjusted to the mathematical equations. Fragmentation of the phytomass increases the rate of decomposition and release of N, P, Ca and S. K is available quickly, with on average 1.5% of the total amount accumulated at 91 DAM. By 91 DAM at least 80% of all the macronutrients had been released into the soil. The maximum daily release of macronutrients occurs between 0 to18 DAM. The release rate of Si is constant, and there is an increase of the content of this element in the phytomass over time, due to the marked release of C. The element Si is that released most slowly into the soil, with there still ...

show abstract

Section: Introductionunclassified

Persistência e liberação de elementos da fitomassa do consórcio crotalária com milheto sob fragmentação

Costa¹,

Crusciol²,

Soratto³

et al. 2014

Rev. Ciênc. Agron.

Self Cite

View full text Add to dashboard Cite

show abstract

“…The small biomass accumulation of palisadegrass occurred because the herbicide was applied at 75 DAM, in order to leave enough time to plant a summer crop in succession. Nitrogen, one of the nutrients most required by palisadegrass (Crusciol & Soratto 2007), has a direct effect on dry matter production (Santos et al 2009). However, there was no significant interaction between time and fertilization (Table 1).…”

Section: Resultsmentioning

confidence: 99%

“…Esses resultados evidenciam o elevado potencial dessa espécie para sistemas de integração lavoura-pecuária, com algumas vantagens que podem ser potencializadas com doses maiores de N. The benefits of cover crops have been observed by several authors, either in the chemical and physical properties of the soil, or in the yield of crops planted in succession. These benefits result from cover crop biomass production, accumulation and subsequent release of nutrients by decomposing straw (Crusciol & Soratto 2007, Torres et al 2008. Among the species commonly used, palisadegrass [Urochloa brizantha (Syn.…”

Section: Introductionmentioning

confidence: 99%

Nitrogen fertilization on palisadegrass: phytomass decomposition and nutrients release

Costa

Crusciol

Soratto

et al. 2016

Pesqui. Agropecu. Trop.

Self Cite

View full text Add to dashboard Cite

Topdressing or pre-seeding nitrogen (N) application increases phytomass production, providing a higher nutrients accumulation and indirectly favoring the subsequent crop. However, N fertilization can alter the dry matter decomposition and nutrients release dynamics. This study aimed at evaluating the decomposition rate, cellulose, lignin and nutrients release speed from palisadegrass as a function of N fertilization. The experimental design was randomized blocks with four replications, in a factorial scheme constituted by two N fertilization levels and six sampling times after desiccation [0, 14, 34, 41, 51 and 68 days after management (DAM)]. The topdressing N fertilization on palisadegrass increases the dry matter production and N accumulation, but does not alter the decomposition and release speed. N fertilization reduces the C/N ratio, but it does not change the contents of cellulose and lignin and the decomposition and release of N, K, Ca, Mg, C and Si. The amounts of P and S accumulated in the plant and released into the soil increase with N fertilization. The maximum release rates occur within 0-14 DAM, being more intensive for P and S when N is applied. These results demonstrate the high potential of this species for crop-livestock integration systems, with some advantages that can be potentialized with higher N doses.

show abstract

“…The persistence of biomass on the ground, ability to recycle nutrients, mobilization leachate or poorly soluble elements and the release of these for subsequent crop are important indicators of the quality of cover crops (BOER et al, 2007;SORATTO , 2007;CRUSCIOL et al, 2008;LEITE et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

Phytomass decomposition and nutrients release from pearl millet, guinea grass and palisade grass

et al. 2016

Self Cite

View full text Add to dashboard Cite

ABSTRACT:The objective of this study was to evaluate the production and persistence of biomass of pearl millet (Pennisetum glaucum), guinea grass (Panicum maximum) and palisade grass (Urochloa brizantha), as well as the release rate of macronutrients and Si and changes in cellulose, lignin and the C/N and C/Si ratios of biomass. The experimental design was a randomized block design, with four replications, in a factorial constituted by three cover crops (pearl millet, guinea grass and palisade grass) and six sampling times (0, 14, 34, 41, 51 and 68 days after desiccation (DAD). The pearl millet produced more biomass and accumulated more N, P, K, Ca, Mg, S, Si and C than the guinea grass and palisade grass. The maximum release rate of macronutrient occurred soon after the desiccation of the cover crops. The decomposition and release rate of nutrients and Si was higher in the biomass of pearl millet, compared to other cover crops. Over time there was an increased C/N ratio, cellulose and lignin content and reduction in the C/Si and decomposition rate of the biomass. The K is the nutrient most quickly available to the soil, and Si has the lowest release rate. Plants with higher biomass production and lower C/Si are more interesting to be used under no-till by offering greater and more persistent ground cover.

show abstract

Nutrição e produtividade do amendoim em sucessão ao cultivo de plantas de cobertura no sistema plantio direto

Cited by 30 publications

References 13 publications

Persistência e liberação de elementos da fitomassa do consórcio crotalária com milheto sob fragmentação

Persistência e liberação de elementos da fitomassa do consórcio crotalária com milheto sob fragmentação

Nitrogen fertilization on palisadegrass: phytomass decomposition and nutrients release

Phytomass decomposition and nutrients release from pearl millet, guinea grass and palisade grass

Contact Info

Product

Resources

About