Adubação com KCl revestido na cultura do milho no Cerrado

Rodrigues, Mateus Augusto de Carvalho; Buzetti, Salatiér; Filho, Marcelo Carvalho Minhoto Teixeira; Garcia, Cássia Maria de Paula; Andreotti, Marcelo

doi:10.1590/s1415-43662014000200001

Cited by 21 publications

(21 citation statements)

References 17 publications

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“…Consequently, this system provided larger amounts of N compared to the conventional urea system. According to Rodrigues et al (2014), the slow or gradual release of fertilizers depends on having water and soil temperatures equal or greater than 21 ºC for the proper release of the nutrients to the plants. Therefore, it is likely that the coating was The effectiveness of a coated fertilizer depends on the solubility of the polymer-coated granule and the rate of hydrolysis, which regulates the nutrient supply process.…”

Section: Resultsmentioning

confidence: 99%

“…Among these advances, there is a search for new coated fertilizers as urea granules coated with various materials (resins, waxes, polymers, etc.) may depend on the characteristics of the polymers and increase efficiency through a gradual nutrient release mechanism (CIVARDI et al, 2011;RODRIGUES et al, 2014). The gradual release of nitrogen fertilizer has several benefits.…”

Section: Introductionmentioning

confidence: 99%

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Residual Effects of Nitrogen Fertilizer With Polymer-Coated Urea in a Corn Crop

et al. 2017

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-The use of nitrogenous fertilizer coated by polymers may reduce losses caused by volatilization, thus exposing this element to plants for a longer period of time. The objective of this work was to evaluate the residual effects of nitrogen in the form of conventional urea and urea coated by polymers in the production components and grain productivity of the first and second corn crops. The experiment was conducted in Selvíria -MS in a clay-type Oxisol during the corn crops of 2011/12 and 2012. The experiment was arranged as a randomized block design with four replications, with a factorial 4 x 4 treatment arrangement as follows: 4 doses of N (0, 40, 80 and 120 kg ha RESUMO -A utilização de fertilizantes nitrogenados revestidos por polímeros pode permitir a redução das perdas por volatilização, disponibilizando assim, esse elemento para as plantas por maior período de tempo. Neste contexto, objetivou-se avaliar o efeito residual de doses de nitrogênio na forma de ureia convencional e ureias revestidas por polímeros, nos componentes de produção e na produtividade da cultura do milho primeira e segunda safra. O experimento foi conduzido em Selvíria -MS, em Latossolo Vermelho distrófico de textura argilosa, em 2011/12 e 2012. O experimento foi disposto em blocos casualizados com quatro repetições, e os tratamentos em um esquema fatorial 4 x 4, sendo: 4 doses de N (0, 40, 80 e 120 kg ha -1 ) e 4 formas de ureia (ureia convencional e ureias revestidas por 3 diferentes polímeros). Os tratamentos foram aplicados na semeadura do milho na primeira safra (2010/11) e segunda safra (2011), sendo avaliado o efeito residual da adubação nitrogenada no cultivo sucessor de milho na primeira safra (2011/12) e segunda safra (2012). As formas de ureia revestidas por polímeros não diferiram em relação à ureia convencional. Palavras-chave:Zea mays L.. Fertilizante revestido. Nitrogênio. Fertilizantes de eficiência aprimorada.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Residual Effects of Nitrogen Fertilizer With Polymer-Coated Urea in a Corn Crop

et al. 2017

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“…This character is of extreme importance for the crop, since it is determinant for the best balance of the plant (Kappes et al, 2011;Nardino et al, 2016b). Research has shown that this characteristic can be influenced by the intraspecific competition of plants per unit area (Kappes et al, 2011;Nardino et al, 2016c), high levels of nitrogen fertilizers (Santos et al, 2010), potassic fertilizers (Rodrigues et al, 2014), and characteristics of the genotype used (Meira, 2006). Studies have determined that 83% of modern corn genotypes show a height of spike insertion of around 1.3 m (Sawazaki & Paterniani, 2004).…”

Section: Resultsmentioning

confidence: 99%

Interrelations of Characters and Multivariate Analysis in Corn

Szareski¹,

Carvalho²,

Kehl³

et al. 2018

JAS

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The objective of this work was to evaluate the agronomic performance of corn hybrids, the interrelations of the characters with the grain yield, and to genetically discriminate the corn hybrids by means of the dispersion analysis of the canonical variables. The experiment was conducted in the agricultural crop of 2013/2014, in an area belonging to the Federal University of Santa Maria, Campus of Frederico Westphalen, RS. The experimental design was a randomized block design, with four replications. The treatments were composed of seven maize hybrids with different genetic bases and maturation cycles. The LG 6304 modified simple hybrid has higher grain yield than the others. The characters plant height, spike insertion height and number of grains per row of spike have positive interrelations with grain yield of corn hybrids. Hybrids are not grouped according to the genetic basis and maturation cycle. The canonical variables explain 94.62% of the existing genetic variation, and allows the formation of five groups of maize hybrids.

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“…According to Rodrigues et al (2014), K has great impact on the quality of the corn crop, with positive influence on the individual mass of grains and number of grains per ear, which evidences that the increase in crop yield depends, among other factors, on the increase in the absorption of the nutrient. Still according to the previously mentioned authors, after N, K is the element absorbed in highest amount by corn and 30% is exported in the grains, which would explain the observed decrease.…”

Section: Resultsmentioning

confidence: 99%

Macronutrient and sodium content in maize plants under cassava wastewater fertilization

Magalhães

Rolim

Duarte

et al. 2016

Rev. bras. eng. agríc. ambient.

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A B S T R A C TThis study aimed to evaluate the content of macronutrients and sodium in corn (Zea mays) plants as a function of different doses of cassava wastewater and ages of the plants after emergence. The experiment was conducted in a greenhouse in pots with capacity for 25 dm 3 of soil, using a 5 × 3 factorial design with four replicates. The studied factors were doses of cassava wastewater: 0; 12.6; 25.2; 50.4; 75.6 m 3 ha -1 , and plant age: 20, 40 and 52 days after emergence (DAE). Potassium, calcium, magnesium, nitrogen, phosphorus, sodium and sulfur contents were evaluated in leaves and stalks. Nutritional deficiency of calcium was visible at 20 DAE. The increment in cassava wastewater doses increased N, P and K contents in plant shoots, but decreased Ca and Mg absorption. The contents of N, P and K in the leaves and N in stalks at 20 DAE were higher than at 40 and 52 DAE. The highest contents of P and K in the stalks occurred at 40 DAE.Teores de macronutrientes e sódio em plantas de milho biofertilizadas com manipueira R E S U M O Objetivou-se, com este trabalho, avaliar os teores de macronutrientes e sódio em plantas de milho (Zea mays) em função da aplicação de doses de manipueira e idade das plantas após a emergência. O experimento foi conduzido em casa de vegetação em vasos com capacidade de 25 dm 3 de solo usando o esquema fatorial 5 × 3 com quatro repetições. Os fatores de estudo foram doses de manipueira: 0; 12,6; 25,2; 50,4; 75,6 m 3 ha -1 e idade das plantas aos 20, 40 e 52 dias após a emergência (DAE). Foram avaliados, nas folhas e no colmo, os teores de nitrogênio, fósforo, potássio, cálcio, magnésio, enxofre e sódio. Aos 20 DAE as plantas apresentaram deficiência nutricional em cálcio. O incremento das doses de manipueira aplicadas no solo aumentou os teores de N, P e K na parte aérea das plantas e reduziu a absorção de Ca e Mg. Os teores de N, P e K nas folhas e de N nos colmos das plantas de milho, aos 20 DAE, foram maiores que aos 40 e 52 DAE. Os maiores teores de P e K foram registrados nos colmos aos 40 DAE.

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Adubação com KCl revestido na cultura do milho no Cerrado

Cited by 21 publications

References 17 publications

Residual Effects of Nitrogen Fertilizer With Polymer-Coated Urea in a Corn Crop

Residual Effects of Nitrogen Fertilizer With Polymer-Coated Urea in a Corn Crop

Interrelations of Characters and Multivariate Analysis in Corn

Macronutrient and sodium content in maize plants under cassava wastewater fertilization

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