Coberturas vegetais, manejo do solo, doses de nitrogênio e seus efeitos na nutrição mineral e nos atributos agronômicos do milho

Kappes, Claudinei; Arf, Orivaldo; Andrade, João Antônio da Costa

doi:10.1590/s0100-06832013000500021

Cited by 9 publications

(12 citation statements)

References 23 publications

(26 reference statements)

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“…Maximum concentration occurred at 144 kg ha -1 (Figure 2c). Kappes et al (2013a) also verified a linear increase in P concentration with an increase in N rates in topdressing. The root system develops better when N fertilizer is used, which improves diffusion between the phosphate and roots in the soil.…”

Section: Resultssupporting

confidence: 59%

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Corn Yield and Foliar Diagnosis Affected by Nitrogen Fertilization and Inoculation with Azospirillum brasilense

Galindo

Filho

Buzetti

et al. 2016

Rev. Bras. Ciênc. Solo

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ABSTRACT:The biological nitrogen fixation (BNF) process in grasses is caused by diazotrophic bacteria, particularly Azospirillum brasilense. However, studies are lacking on BNF efficiency to define how much mineral nitrogen (N) can be applied to achieve more sustainable high yields. Furthermore, there should be an analysis of whether urea with the urease enzyme inhibitor NBPT is less harmful, benefiting BNF in grasses. The objective of this study was to evaluate the effect of N sources and N rates associated with inoculation with Azospirillum brasilense regarding foliar diagnosis and leaf chlorophyll index (LCI), agronomic efficiency (AE), and corn grain yield in the Cerrado (Brazilian tropical savanna) region. The experiment was conducted in a no-tillage system in a Latossolo Vermelho Distroférrico (Oxisol). A randomized block experimental design was used with four replications in a 2 × 5 × 2 factorial arrangement as follows: two N sources -urea and Super N, urea with urease enzyme inhibitor NBPT [N -(n-butyl thiophosphoric triamide)]; five N rates (0, 50, 100, 150, and 200 kg ha -1 ) applied in topdressing; and two seed inoculation treatments, one with and one without A. brasilense. N rate positively influenced the LCI and concentrations of N, S, and Mn in leaves, and may increase the concentrations of P, Cu, and Fe; however, higher N rates can reduce AE. The N sources had similar effects, and therefore urea is recommended for N fertilization. Inoculation with A. brasilense decreased leaf concentration of Fe and increased LCI, leaf concentration of P, AE, and corn grain yield; the use of this diazotrophic bacterium is therefore viable even when high rates of N are applied.

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Section: Resultssupporting

confidence: 59%

“…Casagrande and Fornasieri Filho (2002) and Kappes et al (2013a) also found that N rates did not influence K concentration in corn leaves. Average K concentrations (Table 1) were below recommended values (Cantarella et al, 1997), which range from 17.0 to 35.0 g kg -1 .…”

Section: Resultsmentioning

confidence: 91%

Corn Yield and Foliar Diagnosis Affected by Nitrogen Fertilization and Inoculation with Azospirillum brasilense

Galindo

Filho

Buzetti

et al. 2016

Rev. Bras. Ciênc. Solo

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“…In contrast, Kappes et al (2013) verified that systems with soil mobilization decrease the final population of plants, since they obtained larger populations in tillage systems with soil stirring. Means followed by the same letter in the column do not differ by the Tukey test.…”

Section: Resultsmentioning

confidence: 80%

“…In contrast, a study by Jung et al (2009) with disk and pneumatic seeders, testing the rates of 4.9; 5.8; 7.0 km h -1 , claim no variation in yield. Another factor that may affect the development of the maize plant is the tillage system and, in this respect, Kappes et al (2013) verified that maize height was lower with soil tillage systems when compared to no-tillage in two agricultural years, the same effect being observed for ear height. Narimatsu et al (2014) found that maize yield did not differ between soil management systems (conventional tillage, minimum tillage and no-tillage), with differences only for the first ear insertion height.…”

Section: Introductionmentioning

confidence: 79%

Tillage and sowing rate in soil physical and agronomic attributes of maize crop

et al. 2017

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Soil is an important resource to promote increased maize yield, which can occur through an efficient soil tillage system, this being directly linked to the sowing process. Thus, the objective of this study was to evaluate the influence of tillage systems in an Ultisol and sowing rate on soil physical and agronomic attributes of the maize hybrid BRS 1055. The experiment was conducted in randomized blocks in subdivided plots with four replications, with soil tillage in the plots -moldboard plow + off-set harrow of 24" (T1), off-set harrow of 22" (T2), off-set harrow of 24" (T3) and chisel + off-set harrow of 24" (T4), and the following maize sowing rates: R1 -5.1 km h -1 , R2 -8.7 km h -1 and R3 -10.7 km h -1 . In the soil, the following variables were determined: soil density, soil porosity and soil penetration resistance (RP); and in the crop: plants per meter, plant height, first ear insertion height, viable ears, stem diameter, ear length, number of rows, number of grains per row and yield. Soil density and total porosity did not show differences between soil tillage systems. There was variation of RP in the 0.30-0.40 m layer, due to the depth and type of tillage performed for each implement. The rate variation provided changes in all agronomic attributes of the maize crop, while the soil tillage systems only affected plant height at 30 days after sowing.Additional keywords: agricultural mechanization; maize hybrid BRS 1055; Ultisol. ResumoO solo é um importante recurso para promover o aumento da produtividade do milho, o que pode ocorrer por meio de um sistema de preparo do solo eficiente, e que também esteja ligado diretamente ao processo de semeadura. Assim, objetivou-se avaliar a influência dos sistemas de preparo em Argissolo Amarelo e a velocidade de semeadura sobre os atributos físicos do solo e agronômicos da cultura do milho híbrido BRS 1055. O experimento foi conduzido em blocos ao acaso, em parcelas subdivididas com quatro repetições, sendo realizados os preparos de solo nas parcelas -arado de aivecas+grade off-set de 24" (T1), grade off--set de 22" (T2), grade off-set de 24" (T3) e escarificador+grade off-set de 24" (T4), com velocidades de semeadura do milho: V1 -5,1 km h -1 ; V2 -8,7 km h -1 , e V3 -10,7 km h -1 . No solo, foram determinadas: densidade, porosidade e resistência do solo à penetração (RP), e na cultura: plantas por metro, altura de planta, altura de inserção da primeira espiga, espigas viáveis, diâmetro de colmo, comprimento da espiga, quantidade de fileiras, quantidade de grãos na fileira e produtividade. A densidade e a porosidade total do solo não apresentaram diferenças entre os preparos do solo. Ocorreu variação da RP na camada de 0,30-0,40 m, devido à profundidade e ao tipo de preparo realizado para cada implemento. A variação da velocidade apresentou alterações em todos os atributos agronômicos da cultura do milho, enquanto os sistemas de preparo do solo afetaram apenas a altura de plantas, aos 30 dias após a semeadura.Palavras-chave adicionais: Argissolo Amarelo; me...

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“…Based on the data shown in Fig 3, it can be observed that the N doses adjusted to a positive linear function, in which the increase in N doses in topdressing resulted in an increase in the amount of accumulated N. This can be explained, according to Silva et al (2009), because the mineral fertilizer provides most of the N accumulated in corn plants, followed by soil and green manures. The amount of N accumulated also increased linearly in response to the increasing doses of cover N in an experiment conducted by Kappes et al (2013a). Gava et al (2010) concluded that the increase in N fertilizer doses promoted an increase in N accumulation in corn plants.…”

Section: Initial Population Of Plants Accumulation Of Dry Matter Andmentioning

confidence: 93%

Nutritional aspects of corn due to cover crops, nitrogen doses and inoculation with Azospirillum brasilense

Portugal¹,

Arf²,

Peres³

et al. 2018

Aust J Crop Sci

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In modern agriculture, there is a challenge for adequately nourishing plants using sustainable techniques, mitigating the use of mineral fertilizers, especially nitrogenous fertilizers, which are the most used for corn crops. The objective of this study is to evaluate the accumulation potential of nitrogen, phosphorus and potassium in: a) cover crops (millet, crotalaria, pigeon pea, millet + crotalaria, millet + pigeon pea and fallow) and b) corn plants sown in succession to the cover crops and with application of nitrogen doses (0, 40, 80 and 120 kg ha . Inoculation via seeds using Azospirillum brasilense did not increase the accumulation of dry matter and nutrients of corn plants. It is recommended to cultivate corn in succession to the millet + crotalaria and the aplication of 80 to 100 kg ha -1 of N in topdressing aiming at better nutrition of the plants.

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Coberturas vegetais, manejo do solo, doses de nitrogênio e seus efeitos na nutrição mineral e nos atributos agronômicos do milho

Cited by 9 publications

References 23 publications

Corn Yield and Foliar Diagnosis Affected by Nitrogen Fertilization and Inoculation with Azospirillum brasilense

Corn Yield and Foliar Diagnosis Affected by Nitrogen Fertilization and Inoculation with Azospirillum brasilense

Tillage and sowing rate in soil physical and agronomic attributes of maize crop

Nutritional aspects of corn due to cover crops, nitrogen doses and inoculation with Azospirillum brasilense

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