Diagnose foliar em plantas de milho em sistema de semeadura direta em função de doses e épocas de aplicação de nitrogênio

Nascimento, Flávia Meinicke; Bicudo, Sílvio José; Fernandes, Dirceu Maximino; Rodrigues, José Guilherme Lança; Fernandes, Janainny Magalhães

doi:10.5777/paet.v5.n1.04

Cited by 7 publications

(8 citation statements)

References 3 publications

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“…In response to N rates, the linear increase of Cu content in maize leaves was also reported by Nascimento et al. (2012) in a production system of maize in succession with oat crops. For soybean, the linear raise of Mn leaf content, also as a function of N rates, may be explained by the rhizosphere acidification provided by NH 4 + uptake, as previously argued for P response.…”

Section: Discussionsupporting

confidence: 79%

Soil chemical attributes and nutritional status of soybean and maize intercropped with Urochloa under nitrogen rates

Barzan

Jordão²,

Firmano

et al. 2021

Agronomy Journal

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Maize (Zea mays L.) intercropping with forage plants has been adopted with the main goal of promoting benefits on soil physical properties. However, a better understanding of soil chemical attributes and crops nutrition under this system is necessary. The objective was to verify whether intercropping maize with Urochloa ruziziensis (Germ. & Evrard) Crins, a tropical forage grass originating in Africa, associated with N rates, could provide modifications on soil chemical attributes and nutritional status of maize and soybean [Glycine max (L.) Merr.] grown in succession. The experiment was carried out for three agricultural years at field conditions in a Rhodic Hapludox soil under no‐till system in the state of Paraná, Brazil. Fall/winter (March–August) maize cropping systems, sole or intercropped with U. ruziziensis, were associated with four nitrogen (N) rates (0, 40, 80, and 120 kg ha–1 N) applied as ammonium nitrate (30% N). The soil chemical attributes were not influenced by the factors studied. The N rates linearly increased phosphorus (P), sulfur (S), and copper (Cu) concentrations in maize leaves by 29, 30, and 49%, respectively, whereas for soybeans, only the concentration of manganese was raised by 15%. Maize leaf calcium was linearly reduced with N rates only when sole cropped, up to 15%. The cropping systems did not influence nutrient concentrations in soybean leaves; however, maize leaf concentrations of P within 80 and 120 kg ha–1 of N, as well as potassium, S, and Cu at all N rates, were reduced in 9, 6.5, 6.5, and 8%, respectively.

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Section: Discussionsupporting

confidence: 79%

Soil chemical attributes and nutritional status of soybean and maize intercropped with Urochloa under nitrogen rates

Barzan

Jordão²,

Firmano

et al. 2021

Agronomy Journal

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“…Two possible reasons for this are: a) data variability resulted in a low value for the coefficient of determination, consequently affecting the adjustment of the regression equation; b) a proximity to the optimum point of leaf nitrogen content was reached for sweet corn in that season, hindering the response to the application of higher nitrogen doses. Nascimento et al (2012) report that the adequate nitrogen content for corn crop ranges from 2.7 % to 3.5 %.…”

Section: Resultsmentioning

confidence: 99%

Effect of irrigation and nitrogen fertilization on agronomic traits of sweet corn1

Souza

Cunha

Magalhães

et al. 2015

Pesqui. Agropecu. Trop.

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Irrigation and nitrogen fertilization are management practices that have positive results for the corn crop. This study aimed at evaluating the effect of nitrogen fertilization and irrigation on agronomic traits of sweet corn. Two experiments were carried out in two crop seasons (winter/spring and summer/autumn), in a split-plot design, with the main plots consisting of four irrigation levels (50 %, 75 %, 100 % and 125 % of the crop evapotranspiration - ETc) and subplots consisting of four nitrogen doses (0 kg ha-1, 100 kg ha-1, 200 kg ha-1and 300 kg ha-1), applied at the V3 and V8 stages, via urea, in a randomized blocks design experiment, with four replications. Leaf nitrogen content, root depth, plant height, stem diameter, ear yield and water use efficiency were evaluated. In the winter/spring season, nitrogen fertilization did not affect yield, while in the summer/autumn season the dose that maximized yield was 300 kg ha-1. Sweet corn showed better results when irrigated with replacements of 50 % and 125 % of ETc, respectively in the summer/autumn and winter/ spring seasons.

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“…The greater number of dwarf pigeon pea plants in the PR2B treatment probably caused a greater amount of nitrogen, which could have favored absorption by the corn plants. An increase in nitrogen availability is accompanied by a positive response in N content in the leaves (Nascimento et al, 2012).…”

Section: Resultsmentioning

confidence: 99%

Macronutrient content and accumulations in different arrangements of dwarf pigeon pea intercropped with corn

Gallo¹,

Fontanétti²,

Guimaraes³

et al. 2017

Afr. J. Agric. Res.

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Intercropping is a technique which consists of cultivating two or more species in the same area. In these systems, planning and management should be carried out in order to avoid interspecies competition for water, light, and nutrients. This paper aimed to evaluate macronutrient content and accumulations in corn (Zea mays L.) intercropped with dwarf pigeon pea (Cajanus cajan L.) in different plant arrangements. The experimental design adopted was one of randomized blocks, with six treatments and four repetitions. The treatments consisted of different arrangements of dwarf pigeon pea intercropped with corn: corn in monoculture, dwarf pigeon pea sown in the same rows as the corn, one row of dwarf pigeon pea sown between the rows of corn, dwarf pigeon pea sown in the same rows and in a row between the corn, and dwarf pigeon pea sown in the same rows and in two rows between the corn. The following variables were evaluated: dry matter (t ha ). The arrangement with dwarf pigeon pea sown in the same rows and in two rows between the corn increased N content in the corn plants, in relation to the other arrangements and the corn in monoculture. Ca content and accumulations were higher in corn in monoculture and in the arrangement with dwarf pigeon peas sown in the same rows as the corn.

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Diagnose foliar em plantas de milho em sistema de semeadura direta em função de doses e épocas de aplicação de nitrogênio

Cited by 7 publications

References 3 publications

Soil chemical attributes and nutritional status of soybean and maize intercropped with Urochloa under nitrogen rates

Soil chemical attributes and nutritional status of soybean and maize intercropped with Urochloa under nitrogen rates

Effect of irrigation and nitrogen fertilization on agronomic traits of sweet corn1

Macronutrient content and accumulations in different arrangements of dwarf pigeon pea intercropped with corn

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