Produção de milho em plantio direto com adubação nitrogenada e cobertura do solo na pré-safra

Andrioli, Itamar; Beutler, Amauri Nelson; Centurion, José Frederico; Andrioli, Fabrícia Flávia; Coutinho, Edson Luiz Mendes

doi:10.1590/s0100-06832008000400034

Cited by 16 publications

(13 citation statements)

References 14 publications

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“…In the crop rotation/succession system, the maintenance of crop residues (straw) on the soil surface provides several benefits such as the energy dissipation of raindrop impact, increase in water infiltration, moisture preservation, improvement of macro and micro fauna activity present in the soil and nutrient cycling efficiency, and reduction of thermal amplitude, erosion losses, and weed incidence (ANDRIOLI et al, 2008;CHIODEROLI et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

Seed vigor and amount of soybean straw on seedling emergence and productive performance of wheat

Abati¹,

Brzezinski²,

Zucareli³

et al. 2017

SCA

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The use of high-quality seeds is essential to minimize the possible suppressive effect of straw on seedling emergence, contributing to stand establishment and high grain yield. The aim of this study was to assess the influence of seed vigor associated with soil cover with different amounts of soybean straw on seedling emergence and productive performance of wheat. The experiment was conducted in a greenhouse using two wheat cultivars (CD 150 and BRS Gralha Azul) under a completely randomized design in a 2 × 5 factorial scheme with four replications. Factors consisted of two seed vigor levels (high and low) and five amounts of soybean straw (0, 3, 6, 9, and 12 t ha −1). The following assessments were performed: seedling emergence, dry mass of seedling shoot, number of tillers, plant height, yield components (number of spikes per plant, number of grains per spike, and mass of one thousand seeds), grain yield, and harvest index. The use of high vigor seeds favors the emergence and dry mass production of seedling shoot for both cultivars. The increased amount of soybean straw reduces seedling emergence in both cultivars. In the cultivars CD 150 and BRS Gralha Azul, the amounts of soybean straw of 2.45 and 5.40 t ha −1 , respectively, result in a higher wheat grain yield. Key words: Seedling establishment. Seed quality. Triticum aestivum L. Vegetation cover. ResumoO uso de sementes de elevada qualidade é fundamental para minimizar o possível efeito supressor da palhada sobre a emergência de plântulas, contribuindo para o estabelecimento do estande e a obtenção de altos rendimentos de grãos. O objetivo foi avaliar a influência do vigor de sementes associado à cobertura do solo com diferentes quantidades de palhada de soja, sobre a emergência de plântulas e o desempenho produtivo da cultura do trigo. O experimento foi conduzido em casa de vegetação, utilizando duas cultivares de trigo (CD 150 e BRS Gralha Azul), sob o delineamento inteiramente casualizado, em esquema fatorial 2x5, com quatro repetições. Os fatores foram constituídos por dois níveis de vigor de sementes (alto e baixo) e cinco quantidades de palhada de soja (0, 3, 6, 9 e 12 t ha -1 ). As avaliações efetuadas foram: emergência de plântulas, massa seca da parte aérea de plântulas, número de perfilhos, altura de plantas, componentes do rendimento (número de espigas por planta, número de grãos por espiga e massa de mil sementes), produtividade de grãos e índice de colheita. A utilização de sementes de alto vigor favorece a emergência e a produção de massa seca da parte aérea das plântulas,

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Section: Introductionmentioning

confidence: 99%

Seed vigor and amount of soybean straw on seedling emergence and productive performance of wheat

Abati¹,

Brzezinski²,

Zucareli³

et al. 2017

SCA

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“…Some systems have been developed in response to this issue, with the common objective of providing a more sustainable management of the soil, as in the case of the no-tillage system (SPD), which advocates the constant maintenance of mulch on the soil, among other objectives; and integrated systems, such as crop-livestock integration (ILC), which combines annual crops and pasture in the same area (Andrioli et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

Quantification of the Carbon Content of the Fractions of Humic Substances and Total Organic Carbon in Different Production Systems

Rego¹,

Egewarth²,

Francziskowski³

et al. 2017

JAS

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Soil organic matter is degraded and easily altered by the type of management. The objective of this work is to determine the total organic carbon and humic substance fractions in the organic matter of the soil with different management types and depths in the western region of Paraná, Brazil. The work was carried out in the Experimental Farm "Professor Antônio Carlos dos Santos Pessoa", belonging to the State University of the West of Paraná. Five soil management systems were evaluated: one area with corn cultivation for silage (CS); other area with succession of crops, with soybean in summer and corn in winter (SC); the next area also with succession of crops, with soy in the summer and oat in the winter (SO); the following area with permanent pasture with Tifton (PP); and the last area with crop-livestock integration (ILC). For each management system, four plots were randomly selected, in each plot three simple samples were collected in a diagonal direction to form a composite sample for the depth of 0.00-0.05 m, 0.05-0.10 m and 0.10-0.15 m. Total organic carbon, fractionation of the humic substances and the AH/AF and EA/HUM ratios were calculated. For most of the analyzed variables, it was verified that there were significant differences (P < 0.05) between the systems evaluated in the studied depths. In the evaluated areas, the PP, SO and ILC systems presented the highest carbon content for all attributes analyzed.

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“…One should also take into consideration the phytomass and soil cover productivity (NUNES et al, 2006;ANDRIOLI et al, 2008) and the potential of these plants to be, or not, hosts for pests or diseases (BARROS et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

Bioecology of Spodoptera frugiperda (JE Smith, 1757) in different cover crops

Dias¹,

Marucci²,

Mendes³

et al. 2016

Biosci. J.

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ABSTRACT:The objective of this work was to evaluate the biological variables of Spodoptera frugiperda on species of cover crops. The experiments were conducted in laboratory and greenhouse using the following species: sunflower (Helianthus annuus), sun hemp (Crotalaria juncea), brachiaria (Urochloa decumbens e Urochloa ruziziensis), millet (Pennisetum americanum), black oat (Avena stringosa), white lupin (Lupinus albus), forage turnip (Rafanus sativus) and maize (Zea mays). In laboratory the S. frugiperda larval survival varied from 57%, on L. albus, to 93% on H. annuus and the survival of the pre-imaginal phase varied from 45% on U. decumbens to 81.6% on Z. mays. On C. juncea the larval biomass was lower and the development period of the young and larval stage was higher. The adaptation index was less on C. juncea in greenhouse and laboratory. In greenhouse the larval survival at 14 days was similar for all plants and at 21 days was the lowest on C. juncea. There was less accumulation of biomass at 14 days on C. juncea and at 21 days on C. juncea and A. stringosa. Regarding damage, C. juncea presented less susceptibility to Spodoptera frugiperda attack, which together with the other evaluated parameters, indicated this plant as the most appropriate for soil cover before cultivation of maize.

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Produção de milho em plantio direto com adubação nitrogenada e cobertura do solo na pré-safra

Cited by 16 publications

References 14 publications

Seed vigor and amount of soybean straw on seedling emergence and productive performance of wheat

Seed vigor and amount of soybean straw on seedling emergence and productive performance of wheat

Quantification of the Carbon Content of the Fractions of Humic Substances and Total Organic Carbon in Different Production Systems

Bioecology of Spodoptera frugiperda (JE Smith, 1757) in different cover crops

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