Produ&amp;#231;&amp;#227;o de soja e milho cultivados sobre diferentes coberturas1

Borges, Wander Luis Barbosa; Freitas, Rogério Soares de; Mateus, Gustavo Pavan; Sá, Marco Eustáquio de; Alves, Marlene Cristina

doi:10.1590/s1806-66902015000100011

Cited by 7 publications

(4 citation statements)

References 8 publications

(8 reference statements)

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“…Regarding nutrient cycling, the amount of these elements in the plant is proportional to the dry mass produced, varying among species according to the absorption efficiency (Pissinati et al, 2018). However, for the cycling efficiency of the essential elements, there should be synchrony between the nutrient released by the residue of the cover plants and the demand for the crop grown in succession (Barbosa et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Dry Mass Accumulation, Nutrients and Decomposition of Cover Plants

Sousa¹,

Medeiros²,

Lacerda³

et al. 2019

JAS

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The use of cover crops is an important strategy for soil management in the Brazilian Cerrado to improve no-tillage (NT) systems. For this, it is necessary know the potential of cover crop species for biomass production, nutrient cycling, and persistence of residues on the soil surface in soils and climatic conditions of this biome. Thus, the experiment was developed to evaluate the agronomic potential of cover crops cultivated on an Oxisol (Latossolo Amarelo) in the Cerrado of Piauí, Brazil. The experiment was conducted from January 2015 to July 2016. The experimental design was in randomized blocks with 11 treatments and four replicates. The treatments consisted of single and intercropped cover species. The evaluations were: dry mass production, nutritional composition of the plants, nutrient accumulation by dry mass produced and decomposition rate of the dry mass produced for each treatment. The higher dry matter production was obtained with Crotalaria juncea, Cajanus cajan (cv. IAC-Fava larga), Pennisetum glaucum and Brachiaria ruziziensis. The lower dry matter production was obtained with Mucuna aterrima, and mix of Crotalaria spectabilis + Pennisetum glaucum. The higher nutrients accumulation in the plants occurred for Cajanus cajan (cv. IAC-Fava larga), Crotalaria juncea and Crotalaria spectabilis. The cover plants studied presented good potential for soil conservation, due to the permanence of residues on the surface, except for Mucuna aterrima and Crotalaria spectabilis.

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Section: Introductionmentioning

confidence: 99%

Dry Mass Accumulation, Nutrients and Decomposition of Cover Plants

Sousa¹,

Medeiros²,

Lacerda³

et al. 2019

JAS

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“…In the same region of this study, Sousa et al (2019) obtained similar values of DM and Pacheco et al 2017found higher values of approximately 11,000 kg•ha -1 . Among other factors, the higher DM production of millet is associated with its better adaptation to local edaphoclimatic conditions and its rapid growth, expressing high potential for use in the region, with efficient cover by its residues and remaining longer on the soil surface in relation to the other cover crops (Borges et al 2015;Sousa et al 2019).…”

Section: Dry Mass and Nutrient Accumulation By Cover Cropsmentioning

confidence: 99%

“…One of the benefits is due to the higher nitrogen accumulation provided by the cultivation of these plants, as shown in Table 2. Although soybean have symbiosis with nitrogen-fixing bacteria, this is the most required and exported nutrient by this crop (Borges et al 2015). These legume cover species have low C:N ratio and low lignin concentration, which accelerates the decomposition of their residues, makes nutrients readily available in the soil solution and favors their utilization by the sequential crop (Carvalho et al 2015).…”

Section: Soybean Yieldmentioning

confidence: 99%

Conservation system improves soil microbial quality and increases soybean yield in the Northeastern Cerrado

et al. 2020

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The conservation tillage systems is based on the surface protection by crop residue and reduced soil disturbance. These two principles can favor the soil quality and promote sustainable agricultural systems. The study was developed with the objective of measure soil microbial biomass, soil basal respiration, enzymatic activity and soybean yield in conservation systems cultivated with cover crops species in the Northeastern Cerrado. The experiment was carried out in 2016/2017 and 2017/2018 cropping seasons, performed in a randomized blocks design. The treatments were soil tillage systems allocated in the main plots: no-tillage (NT) and minimum tillage (MT) and the cover crops were allocated in the subplots: Pennisetum glaucum (millet), Urochloa ruziziensis (brachiaria), Crotalaria spectabilis (C. spectabilis), Crotalaria ochroleuca (C. ochroleuca), Pennisetum glaucum + Crotalaria spectabilis (millet + C. spectabilis) and spontaneous plants with three replicates. The evaluated variables were dry mass (DM) production and nutrient accumulation in cover crops; soil biological properties, namely microbial biomass carbon and nitrogen (MBC and MBN, respectively), respiration, metabolic quotient (qCO 2), dehydrogenase enzymatic activity (DH), fluorescein diacetate (FDA); and soybean yield. The higher production of dry mass and nutrient cycling occurs with the intercropping millet + C. spectabilis and single millet. The highest soybean yield occurs in succession to C. ochroleuca and intercropping of the millet + C. spectabilis. Cover crops in conservation systems improve soil microbial quality and increase soybean yield.

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“…Nesse sentido, sistemas de manejo conservacionistas e sustentáveis, que visam melhorar a qualidade e reduzir as perdas de solo se fazem necessários (BORGES et al, 2015; KASSAM; FRIEDRICH; DERPSCH, 2019). Segundo Telles et al (2019), o sistema de plantio direto, que se caracteriza pelo cultivo sobre a palhada de culturas anteriores e o mínimo revolvimento do solo, vem sendo utilizado no Brasil, principalmente, para reduzir as perdas de solo por erosão.…”

Section: Introductionunclassified

Produtividade Do Milho Irrigado Na Região Do Arenito Caiuá No Noroeste Do Paraná

Prado¹,

Tinos

Mahl

et al. 2020

R_I

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Produtividade do milho irrigado na região do Arenito Caiuá no Noroeste do Paraná Giuliani do Prado1; Adriano Catossi Tinos1; denise mahl1 e rafael de almeida schiavon1 1 Departamento de Engenharia Agrícola - DEA, Universidade Estadual de Maringá - UEM, Rodovia PR 482, km 45, CEP: 87.820-000, Cidade Gaúcha-PR, Brasil. E-mail: gprado@uem.br, actinos@uem.br, demahl@gmail.com, raschiavon@gmail.com. 1 RESUMO Este trabalho foi desenvolvido na Universidade Estadual de Maringá, em Cidade Gaúcha/PR, e objetivou avaliar a produtividade da variedade de milho IPR-164, em diferentes sistemas de cultivo e lâminas de irrigação. O experimento, conduzido entre 01/10/2019 a 10/02/2020, foi estabelecido em faixas, com parcelas subdivididas, quatro repetições e dois tratamentos (sistemas de cultivo e lâminas de irrigação). Nas parcelas, os sistemas de cultivo foram: semeadura convencional e semeadura direta. Nas subparcelas, as lâminas de irrigação (percentual da lâmina líquida - %IL) foram: 0, 30, 63, 100 e 193%. Após a colheita, a produtividade de espigas (com e sem palha) e de grãos na umidade de 20,5 e 13% foram avaliadas. Os resultados mostraram que: 1) o sistema de cultivo não influenciou na produtividade; 2) a produtividade respondeu de forma quadrática às lâminas de irrigação; 3) lâminas próximas a 100% da IL resultaram em produtividades máximas e; 4) a sensibilidade ao déficit hídrico promoveu decréscimos de 20,4% na produtividade. Quando o custo do milímetro de água for 10 vezes maior que o custo do quilograma do milho (umidade 13%), economicamente é mais viável produzir 7.957 kg ha-1 com 60% da IL do que alcançar a produtividade máxima (8.283 kg ha-1). Palavras-chave: lâminas de irrigação, sistemas de cultivo, déficit hídrico. Prado, G; Tinos, A. C.; mahl, D; schiavon, R. A. Irrigated corn yield at the Arenito Caiuá region in Northwest of Paraná State, Brazil 2 ABSTRACT This work was performed at Universidade Estadual de Maringá, in Cidade Gaúcha/PR city, Brazil, and aimed to evaluate the corn variety IPR-164 yield, in different tillage systems and irrigation depths. The experiment, carried out from 10/01/2019 to 10/02/2020, was set in strips design, with subdivided plots, four replications, and two treatments (tillage systems and irrigation depths). In the plots, the tillage systems were: conventional-tillage and no-tillage. In the subplots, the irrigation depths (percentage of the net irrigation depth - %NID), were: 0, 30, 63, 100, and 193%. After harvesting, the data corn ear yield (in-husk and unhusked) and the grain yield with the moisture of 20.5 and 13% were evaluated. The results showed that: 1) the tillage system did not influence the corn yield; 2) corn yield presented a quadratic response to the irrigation depths; 3) irrigation depths close to 100% of NID provided maximum yield; 4) the sensitivity to water deficit led to a 20.4% decrease in corn yield. When the millimeter water cost is 10 times greater than the corn kilogram cost (moisture 13%), it is economically more profitable to produce 7,957 kg ha-1 with 60% of NID than to reach the maximum yield (8,283 kg ha-1). Keywords: irrigation depths, tillage systems, water deficit.

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Produção de soja e milho cultivados sobre diferentes coberturas1

Cited by 7 publications

References 8 publications

Dry Mass Accumulation, Nutrients and Decomposition of Cover Plants

Dry Mass Accumulation, Nutrients and Decomposition of Cover Plants

Conservation system improves soil microbial quality and increases soybean yield in the Northeastern Cerrado

Produtividade Do Milho Irrigado Na Região Do Arenito Caiuá No Noroeste Do Paraná

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