Produtividade de fitomassa e relação C/N de monocultivos e consórcios de guandu-anão, milheto e sorgo em três épocas de corte

Calvo, Cássio Loureiro; Foloni, José Salvador Simoneti; Brancalião, Sandro Roberto

doi:10.1590/s0006-87052010000100011

Cited by 48 publications

(50 citation statements)

References 11 publications

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“…The value of N accumulated by the SDM from intercropping (pigeonpea + pearl millet) at the time of desiccation was similar to that obtained by Calvo et al (2010), who applied 200 kg ha -1 of the N-P-K fertilizer 08-28-16 at planting and, similarly to Teixeira et al (2005), grew the cover crops in the period from March to July, showing the importance of studies under different growth, soil and climate conditions.…”

Section: Resultssupporting

confidence: 79%

“…In our study, half the density of each one of the species individually was used, which may however have not been the ideal proportion. Still, this is the proportion seed companies recommend when using intercropping, however, without a scientific basis in the literature, e.g., in a study of Calvo et al (2010), who did not mention the sowing density of the intercropping of the two species, indicating a gap in this line of research. Calvo et al (2010) reported a shoot dry matter production of 1,397 and 7,631 kg ha -1 of pigeonpea and of pigeonpea-pearl millet intercrop, respectively, 60 days after sowing, grown from March to July on a dystroferric Red Nitosol, in a conventional soil tillage system and with fertilization at planting of 200 kg ha -1 of N-P-K fertilizer 08-28-16.…”

Section: Resultsmentioning

confidence: 98%

“…Still, this is the proportion seed companies recommend when using intercropping, however, without a scientific basis in the literature, e.g., in a study of Calvo et al (2010), who did not mention the sowing density of the intercropping of the two species, indicating a gap in this line of research. Calvo et al (2010) reported a shoot dry matter production of 1,397 and 7,631 kg ha -1 of pigeonpea and of pigeonpea-pearl millet intercrop, respectively, 60 days after sowing, grown from March to July on a dystroferric Red Nitosol, in a conventional soil tillage system and with fertilization at planting of 200 kg ha -1 of N-P-K fertilizer 08-28-16. In regard to pearl millet, SDM production in this study was greater than the yields achieved by Boer et al (2007Boer et al ( , 2008 and Cazetta et al (2005), which were 10,801 and 10,673 kg ha -1 51 days after sowing and 60 DAE, respectively.…”

Section: Resultsmentioning

confidence: 98%

“…Intercropping of legumes and grasses is an attempt to unite the individual benefits of each species, to attenuate the problem of low SDM production and persistence, and of soil compaction and N deficiency in the initial stages of development of successive crops, as well as to recycle the nutrients with high mobility in the soil (Aita & Giacomini, 2003;Perin et al, 2004;Teixeira et al, 2005;Calvo et al, 2010), notably N in the form of nitrate, and increase the supply of this nutrient in the soil by biological fixation by the legume. In addition, normally, the content of nutrients in the SDM, the speed of decomposition and nutrient release from these plants varies between grasses and legumes (Boer et al, 2007), which may also be an advantage in intercropping.…”

Section: Introductionmentioning

confidence: 99%

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Cycling of nutrients and silicon in pigeonpea and pearl millet monoculture and intercropping

Crusciol

Neto

Soratto

et al. 2013

Rev. Bras. Ciênc. Solo

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SUMMARYIn a no-tillage system, cover crops must be used that combine shoot dry matter production and nutrient recycling. The aim of this study was to evaluate shoot dry matter production, decomposition rate and macronutrient and silicon release from pigeonpea and pearl millet in monoculture and intercropping systems. A randomized block design was used with a 3 x 6 factorial arrangement, with four replications. The first factor consisted of three cover crops (pigeonpea, pearl millet and intercropping of these cover crops) and the second consisted of six sampling times [0, 18, 32, 46, 74 and 91 days after desiccation (DAD)]. Pearl millet produced greater amounts of shoot dry matter and content of N, P, K, Ca, Mg, S, C and Si and had a higher decomposition rate and macronutrient and Si release than the other cover crops. The rates of decomposition and daily nutrient release from shoot dry matter were highest in the first period of evaluation (0-18 DAD). Over time, the C/N, C/P and C/S ratios increased, while C/Si and the decomposition rate decreased. Potassium was the nutrient most quickly released to the soil, especially from pearl millet residue. Silicon had the lowest release rate, with 62, 82 and 74 % of the total content in the shoot dry matter remaining in the last evaluation of pearl millet, pigeonpea and in the intercrop system, respectively. The shoot dry matter from the intercrop system had a different decomposition rate than that from the pearl millet monoculture and pigeonpea. Plants with greater shoot dry matter production and lower C/Si ratio are more effective in a no-tillage system for providing a more complete and persistent soil cover.Index terms: Cajanus cajan, Pennisetum glaucum, intercropping, nutrient release. RESUMO: CICLAGEM DE NUTRIENTES E SILÍCIO PELO GUANDU-ANÃO E MILHETO CULTIVADOS SOLTEIROS E CONSORCIADOSAs características mais importantes na escolha de plantas de cobertura para o sistema plantio direto são a quantidade e a durabilidade da fitomassa produzida, bem como a capacidade de reciclar nutrientes. Este estudo objetivou avaliar a produção de fitomassa, taxa de decomposição e ciclagem de macronutrientes e silício pelo guandu-anão e milheto, em cultivo solteiro e consorciado. O delineamento experimental foi em blocos casualizados, com quatro repetições, em esquema fatorial 3 x 6, constituído por três tipos de cobertura vegetal (guandu-anão, milheto e o consórcio dessas espécies) e seis épocas de coleta [0, 18, 32, 46, 74 e 91 dias, após a dessecação (DAD)]. O milheto produziu maior quantidade de fitomassa, acumulou mais N, P, K, Ca, Mg, S, C e Si e teve maior taxa de decomposição e de liberação de macronutrientes e Si que as demais coberturas vegetais. As maiores taxas de decomposição e liberação diária de nutrientes das fitomassas ocorreram no primeiro período de avaliação (0 a 18 DAD). Com o passar do tempo ocorreu aumento das relações C/N, C/P e C/S e redução na relação C/Si e na taxa de decomposição da fitomassa. O K foi o nutriente mais rapidamente disponibilizado ao solo, e...

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Section: Resultssupporting

confidence: 79%

Section: Resultsmentioning

confidence: 98%

Section: Resultsmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

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Cycling of nutrients and silicon in pigeonpea and pearl millet monoculture and intercropping

Crusciol

Neto

Soratto

et al. 2013

Rev. Bras. Ciênc. Solo

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“…Dentre as espécies utilizadas como adubo verde, a Crotalaria juncea apresenta grande potencialidade para uso no Cerrado, em razão da sua fitomassa permanecer por maior período em solos tropicais, devido à relação carbono/nitrogênio C/N (29) ser superior à algumas leguminosas utilizadas (CARVALHO & AMABILE, 2006), como o guandu (CALVO et al, 2010), Lablabe (CARNEIRO et al, 2008), feijão-de-porco e mucuna (ARAÚJO et al, 2011). A C. juncea apresenta grande aceitação pelos agricultores no planejamento da implementação do sistema de rotação de culturas, o que fundamenta a necessidade de estudos sobre o desempenho do adubo verde nas condições edafoclimáticas encontradas no Cerrado.…”

Section: Introductionunclassified

ACÚMULO DE NUTRIENTES E MASSA SECA PRODUZIDA POR Crotalaria juncea CULTIVADA NO CERRADO

Silva

Oliveira

Merloti³

et al. 2017

Revista Brasileira De Engenharia De Biossistemas

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A adubação verde com Crotalaria juncea é uma estratégia vastamente utilizada no Cerrado para melhorar as características químicas, físicas e biológicas do solo, em uma matriz que apresenta limitações naturais para o desempenho adequado dos cultivos. O objetivo do trabalho foi de verificar o acúmulo de nutrientes e produção de matéria seca por C. juncea cultivada em solo de Cerrado. Dois experimentos foram realizados nos anos de 2015 e 2016, em um Latossolo Vermelho distrófico, no município de Selvíria, MS, Brasil. As semeaduras foram realizadas a lanço em área previamente preparada com aração e gradagem, sem utilização de adubação. Aos 80 dias após a semeadura e antes do pleno florescimento, as plantas foram manejadas com roçadora. Foram feitas as seguintes avaliações: (a) Massa seca: amostras obtidas de cada parcela foram levadas à estufa, realizou-se a mensuração da massa seca e o valor médio foi extrapolado para unidade de kg ha -1 . (b) Acúmulo de nutrientes: após coleta de amostras das plantas, determinou-se os teores de macro e micronutrientes e, posteriormente, multiplicou-se o teor de cada nutriente pela massa seca de C. juncea produzida, obtendo-se o acúmulo de macronutrientes (g kg -1 ) e micronutrientes (mg kg -1 ). O adubo verde apresentou elevada produção de matéria seca e excelente acúmulo de nitrogênio, potássio e ferro. Palavras chave: reciclagem de nutrientes, adubação verde, prática conservacionista ACCUMULATION OF NUTRIENTS AND DRY MATTER PRODUCED BY Crotalaria juncea CULTIVED IN CERRADO ABSTRACTThe green manuring with Crotalaria juncea is a strategy widely used in the Cerrado to improve the chemical, physical and biological characteristics of the soil, in a matrix that presents natural limitations to the proper performance of the crops. The objective of this work was to verify the accumulation of nutrients and dry matter production by C. juncea cultivated in Cerrado soil. Two experiments were carried out in the years 2015 and 2016, in a dystrophic Red Latosol, in the city of Selvíria, MS, Brazil. Seeds were insered in an area with conventional preparation, without the use of fertilization. At 80 days after sowing and before blooming, the plants were managed mechanically. The following evaluations were performed: (a) Dry matter production: the samples obtained from the plants were desiccated and the average dry matter yield was extrapolated to a unit of kg ha -1 . (b) Accumulation of nutrients: after collecting plant samples, the macronutrients and micronutrients contents were determined and, posteriorly, the content of each nutrient was multiplied by the dry mass of C.* mssmarcio@yahoo.com

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Growth, nodulation, production, and physiology of leguminous plants in integrated production systems

Freitas

Ferreira

Alves

et al. 2023

Agrosystems Geosci & Env

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Choosing the species suitable for cultivation in intercropped systems is a critical limiting factor for grain and forage production. This study aimed to evaluate the growth, nodulation, production, and physiology of cowpea (Vigna unguiculata) and guandu bean (Cajanus cajan) intercropped with buffel grass (Cenchrus ciliaris) and Eucalyptus urograndis (Eucalyptus grandis × Eucalyptus urophylla) in an integrated production system. Two experiments were conducted simultaneously, arranged in a 2 × 4 factorial scheme. The first factor consisted of the use of two integrated production systems. The second factor consisted of four distances (2, 4, 6, and 8 m) from the eucalyptus planting rows. In the first experiment, crop-forest systems (CFIS: eucalyptus trees and cowpea) and crop-livestock-forest systems (CLFIS: eucalyptus trees, cowpea, and buffel grass) were evaluated. In the second, livestock-forest systems LFIS1 (eucalyptus trees and guandu bean) and LFIS2 (eucalyptus trees, guandu bean, and buffel grass) were evaluated. In cowpea, nodulation was not influenced by production systems and distances, whereas in guandu bean, there was a reduction in the nodules' number and dry mass with the distance from the trees. Higher growth, biomass production, and photosynthetic activity of cowpea and guandu bean were observed with the increasing distance from the eucalyptus planting rows. However, cowpea increased the 100-seed weight at 2 and 4 m distances from the eucalyptus rows, improving the grains' quality close to the trees. The simultaneous cultivation with buffel grass did not affect the leguminous plant yield, promoting greater diversification and increasing the total biomass production of the intercropping.

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Produtividade de fitomassa e relação C/N de monocultivos e consórcios de guandu-anão, milheto e sorgo em três épocas de corte

Cited by 48 publications

References 11 publications

Cycling of nutrients and silicon in pigeonpea and pearl millet monoculture and intercropping

Cycling of nutrients and silicon in pigeonpea and pearl millet monoculture and intercropping

ACÚMULO DE NUTRIENTES E MASSA SECA PRODUZIDA POR Crotalaria juncea CULTIVADA NO CERRADO

Growth, nodulation, production, and physiology of leguminous plants in integrated production systems

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