Biomass and Nutrient Accumulation of Cover Crops in the Crop Off-season in Cerrado, in Goiás State, Brazil

Pacheco, Leandro Pereira; Medeiros, Marinete Martins de Sousa; Silva, Rodrigo Fonseca da; Soares, Leandro dos Santos; Fonseca, Wéverson Lima; Petter, Fabiano André; Neto, Francisco de Alcântara; Almeida, Fernandes Antônio de; Santos, Glênio Guimarães

doi:10.5539/jas.v4n9p209

Cited by 2 publications

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References 18 publications

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“…Winter cultivation in Cerrado, between May and September, presents low rainfall, and irrigation is used. Currently, one of the major challenges in the Cerrado region is to obtain species with a high potential for grain production in the second crop and simultaneously produce enough biomass for coverage and protect the soil during the off-season, since water availability for the plants in these periods is reduced [3]. The use of cover crop in an agricultural system is mainly beneficial for soil and water conservation [4].…”

Section: Introductionmentioning

confidence: 99%

Nutrient Accumulation in Cover Crops under Contrasting Water Regimes in the Brazilian Cerrado

et al. 2022

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Brazilian Cerrado has a dry period, and the inclusion of new species for diversification in the production system needs to be drought-tolerant. This work aimed to evaluate biomass and nutrient accumulation in species with potential as cover crops and grain crops under different water levels. Irrigation treatments were obtained through an irrigation bar with sprinklers with increasing water flows to create a continuous gradient. The experimental design randomized complete blocks in split plots with four replications. The main plots were composed of four water regimes (167 mm, 268 mm, 381 mm and 432 mm), and the subplots were formed by the following cover crops: Amaranthus cruenthus, Chenopodium quinoa and Pennisetum glaucum, the latter already used for this purpose. Amaranthus cruenthus and P. glaucum recorded the highest dry biomass (10.16 and 9.75 Mg ha−1, respectively). Dry biomass production and the cellulose contents decreased with the reduction of water availability for all species. A. cruenthus was the species that most accumulated P (37.42 kg ha−1), K (416.92 kg ha−1), Mg (30.88 kg ha−1), S (43.53 kg ha−1), Fe (2.22 kg ha−1), B (0.124 kg ha−1) and Zn (0.240 kg ha−1). Amaranthus cruenthus produced the highest yield. Under high and low water availability conditions, A. cruenthus presents potential as a cover crop and grain cash crop, in addition to accumulating more nutrients; P. glaucum has potential as a cover crop and C. quinoa only for grain production.

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Section: Introductionmentioning

confidence: 99%

Nutrient Accumulation in Cover Crops under Contrasting Water Regimes in the Brazilian Cerrado

et al. 2022

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“…A maior parte dos estudos sobre o comportamento de plantas de cobertura na entressafra concentra-se na região do Cerrado onde, entre os meses de abril e setembro, as condições climáticas são de reduzidas precipitações e de elevada temperatura, o que dificulta o estabelecimento destas espécies (PACHECO et al, 2008). O uso de plantas de cobertura semeadas em safrinha no Cerrado tem sido praticado na tentativa de reduzir a erosão, incrementar o teor de matéria orgânica e proporcionar a ciclagem de nutrientes após a colheita da cultura anual (SOUZA et al, 2008;PACHECO et al, 2012).…”

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Produção De Fitomassa E Extração De Macronutrientes Por Plantas De Cobertura Cultivadas Na Estação Seca

Scavazza

Soares

Casagrande

et al. 2018

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Na região centro-sul do Estado de São Paulo, informações sobre a adaptabilidade de plantas de cobertura cultivadas na estação seca são escassas. Objetivou-se com este estudo investigar a produção de fitomassa e extração de macronutrientes em plantas de cobertura durante a estação seca, em um Latossolo Vermelho distrófico, no município de Araras-SP. O delineamento foi em blocos ao acaso, com cinco tratamentos, correspondendo a espécies, em seis blocos. Na entressafra de milho 2015/2016, foram cultivadas: crotalária-spectabilis (Crotalaria spectabilis Roth.), feijão-guandu (Cajanus cajan L.), feijão-de-porco (Canavalia ensiformes L.), mucuna-preta (Stilozobium aterrimum Piper et Tray) e milheto (Pennisetum glaucum L.). O milheto foi a espécie que produziu mais fitomassa seca (acima de 8 t ha-1) e a que mais extraiu macronutrientes (185;10;106;42;18 e 8 kg ha-1 de N, P, K, Ca, Mg e S, respectivamente), apresentando relação C/N inferior a 25, sugerindo que seus resíduos sofreriam uma rápida decomposição e mineralização.A análise de agrupamento indicou que o feijão-guandu obteve desempenho semelhante ao do milheto. Crotalária-spectabilis apresentou a menor fitomassa seca e extraiu menor quantidade de macronutrientes. Neste estudo, milheto e feijão-guandu foram as espécies que mais contribuíram para cobertura do solo e para a reciclagem de nutrientes na estação seca.Palavras-chave: biomassa, nutrição, relação C/N, safrinha. BIOMASS PRODUCTION AND NUTRIENT ACCUMULATION BY COVER CROPS CULTIVATED IN THE DRY SEASON ABSTRACT: In the south-central region of the State of São Paulo, data on the adaptability of cover crops grown in the dry season are insuficient. The objective of this study was to investigate the biomass production and extraction of macronutrients in cover crops during the dry season, in a Oxysoil (LatossoloVermelho), in the city of Araras-SP. The design was in randomized blocks, with five treatments, corresponding to species in six blocks. In the maize off-season 2015/2016, were cultivated: crotalaria spectabilis (Crotalaria spectabilis Roth.), pigeon pea (Cajanus cajan L.), pig bean (Canavalia ensiformes L.), velvet bean (Stilozobium aterrimum Piper et Tray) and millet (Pennisetum glaucum L.). Millet was the species that produced the highest dry matter average (above 8 tons ha-1) and the one that most extracted macronutrients (185;10;106;42;18 and 8 Kg ha-1 of N, P, K, Ca, Mg and S, respectively), showing a C/N ratio of less than 25, suggesting that its residues would undergo rapid decomposition and mineralization. The clustering analysis indicated that the pigeon pea had similar performance to millet. Crotalaria-spectabilis presented the lowest dried biomass extracted a smaller amount of macronutrients. In this study, millet and pigeon pea were the species that contributed the most to cover the soil and to recycle nutrients in the dry season.Keywords: biomass, nutrition, C/N ratio, off-season.

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Biomass and Nutrient Accumulation of Cover Crops in the Crop Off-season in Cerrado, in Goiás State, Brazil

Cited by 2 publications

References 18 publications

Nutrient Accumulation in Cover Crops under Contrasting Water Regimes in the Brazilian Cerrado

Nutrient Accumulation in Cover Crops under Contrasting Water Regimes in the Brazilian Cerrado

Produção De Fitomassa E Extração De Macronutrientes Por Plantas De Cobertura Cultivadas Na Estação Seca

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