Influência de fontes e modos de aplicação de nitrogênio nos componentes da produção e produtividade do milho irrigado no cerrado

Schiavinatti, Amanda Failli; Andreotti, Marcelo; Benett, Cleiton Gredson Sabin; Pariz, Cristiano Magalhães; Lodo, Bruno Nascimento; Buzetti, Salatiér

doi:10.1590/s0006-87052011000400027

Cited by 23 publications

(23 citation statements)

References 19 publications

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“…trabalhando com diferentes fontes e doses de ureia no milho, também observaram efeito significativo das doses de N para a variável diâmetro de colmo. Resultados diferentes foram obtidos por Valderrama et al (2011) que não observaram efeito significativo da aplicação de N para o diâmetro da base do colmo e Schiavinatti et al (2011) constataram que as maiores doses de N fornecidas em cobertura resultaram em colmos mais finos uma vez que na fase de crescimento vegetativo há maior demanda do elemento para a produção de tecidos na planta, resultados diferentes aos encontrados neste trabalho. Goes et al (2012) A. B.…”

Section: Resultsunclassified

Influência da cobertura do solo e doses de nitrogênio na cultura do milho safrinha

Torres¹,

Souza²,

Andrade³

et al. 2014

Agraria

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RESUMOA utilização da cobertura do solo e a adubação nitrogenada em cobertura no sistema de plantio direto, além de essenciais para a conservação do solo podem também auxiliar na disponibilidade de nutrientes para as plantas sucessoras. O objetivo deste trabalho foi avaliar a influência de três diferentes plantas de cobertura de solo e quatro níveis de adubação nitrogenada na cultura do milho safrinha em sistema de plantio direto. O experimento foi conduzido no Núcleo Experimental de Ciências Agrárias da Universidade Federal da Grande Dourados, Dourados-MS. O delineamento experimental foi o de blocos ao acaso no esquema fatorial 3x4, sendo três coberturas do solo (mucuna preta, uma área em pousio com capim camalote e outra com crotalária) e quatro doses de nitrogênio (0, 40, 80 e 120 kg ha -1 ), com quatro repetições. Foram avaliados a altura da planta e a inserção da espiga, diâmetro do colmo, o diâmetro e o comprimento de espigas, o peso de cem grãos e a produtividade. A cobertura do solo influenciou no diâmetro basal do colmo e na produtividade de grãos de milho. O incremento das doses de nitrogênio favoreceu a grande maioria dos componentes de produção da cultura do milho. A utilização das coberturas como mucuna preta e capim camelote e as doses de nitrogênio, aumentaram a produtividade de grãos de milho. Palavras-chave: conservação do solo, produtividade, Zea mays L. Influence of cover crops and nitrogen rates in winter corn crop ABSTRACTThe use of cover crops along with the nitrogen application in no-tillage system, besides being essential for the conservation of soil, can also assist in nutrient availability to succeeding crops. The aim of this study was to evaluate the influence of three different ground cover plants and four levels of nitrogen fertilization on winter maize under no-tillage system. The experiment was conducted at the Experimental Center of Agricultural Sciences of the Universidade Federal da Grande Dourados, Dourados-MS. The experiment was conducted in randomized blocks in a 3x4 factorial design, with three ground covers (velvet bean, an area under fallow with 'camalote' grass and another with sunn hemp) and four levels of nitrogen (0. 40. 80 and 120 kg ha -1 ), with four replications. The plant height and ear height, stem diameter, the diameter and length of ears, weight of hundred grains and productivity of winter corn were evaluated. Soil cover influenced the basal stem diameter and grain yield of maize. The increment of nitrogen favored the vast majority of yield components of corn. The use of hedges such as velvet bean and grass camelote and nitrogen increased the grain yield of maize.

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Section: Resultsunclassified

Influência da cobertura do solo e doses de nitrogênio na cultura do milho safrinha

Torres¹,

Souza²,

Andrade³

et al. 2014

Agraria

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“…The BNF contributed 80 % of the N accumulated in the aerial part of gliricidia (Gliricidia sepium), which corresponded to 109 kg ha -1 , and 64.5 % of the N for crotalaria (Crotalaria juncea), which corresponded to 96.5 kg ha -1 , when intercropped with soursop and mango trees (Paulino et al, 2009 Coffee is one of the most demanding crops in terms of N -the recommendation ranges from 150 to 450 kg ha -1 of N, depending on the age of the crop and yield expectations (Guimarães et al, 1999;Schiavinatti et al, 2011). We are unaware of results from research utilizing the δ 15 N technique to demonstrate the contribution of BNF from legumes in nutrition of coffee plants.…”

Section: Introductionmentioning

confidence: 99%

Biological Nitrogen Fixation by Legumes and N Uptake by Coffee Plants

Mendonça

Lima

Guimarães

et al. 2017

Rev. Bras. Ciênc. Solo

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ABSTRACT:Green manures are an alternative for substituting or supplementing mineral nitrogen fertilizers. The aim of this study was to quantify biological N fixation (BNF) and the N contribution derived from BNF (N-BNF) to N levels in leaves of coffee intercropped with legumes grown on four family farms located in the mountainous region of the Atlantic Forest Biome in the state of Minas Gerais, Brazil. The following green manures were evaluated: pinto peanuts (Arachis pintoi), calopo (Calopogonium mucunoides), crotalaria (Crotalaria spectabilis), Brazilian stylo (Stylosanthes guianensis), pigeon pea (Cajanus cajan), lablab beans (Dolichos lablab), and velvet beans (Stizolobium deeringianum), and spontaneous plants. The experimental design was randomized blocks with a 4 × 8 factorial arrangement (four agricultural properties and eight green manures), and four replications. One hundred grams of fresh matter of each green manure plant were dried in an oven to obtain the dry matter. We then performed chemical and biochemical characterizations and determined the levels of

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“…Nitrogen presents a great dynamic in the soil due to numerous chemical and biological reactions (Cantarella and Duarte, 2004) that result in a complex management of Nfertilization Schiavinatti et al, (2011). Only a part of the N applied is absorbed by the plants, the remainder is lost in the soil-plant-atmosphere system by leaching, volatilization, erosion and denitrification processes, with a fraction remaining in the soil in the organic form (Dhital and Raun, 2016).…”

Section: Introductionmentioning

confidence: 99%

“…The N splitting, the use of different sources and the definition of the time of application are the main alternatives for increasing nitrogen use efficiency and mitigating its losses to the environment (Cantarella, 2007;Schiavinatti et al, 2011). Thus, knowing how these techniques influence maize productivity is vital since N-fertilization is one of the most expensive steps in maize production (Gramig, Massey, Yun, 2016).…”

Section: Introductionmentioning

confidence: 99%

The effect of types and split of urea on yield indicators and yield components of maize

Oliveira¹,

Krysczun²,

Ubessi³

et al. 2017

Aust J Crop Sci

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Maize is one of the most important cereals in the world. The productive potential of this crop is closely associated with nitrogen (N) fertilization, thus, studies focused on this subject are important in the development of cropping strategies. The aim of this work was to evaluate the effects of N split and different type of urea on important agronomic traits of the maize crop. A randomized complete block design in a 2×2+1 factorial treatment design with four replications was used. The factorial levels were composed of two types of urea (common and coated) and two nitrogen splits (V 3 and V 3 +V 8 ), plus the control treatment (without urea application). Important agronomic traits such as grain yield, biological productivity, and yield components were assessed. It was verified that there is no difference between the common or coated urea on grain yield and its components. On the other hand, the split of nitrogen into V 3 and V 8 stages is an efficient strategy to improve grain yield as well as important features as the number of rows per ears and harvest index. Thus, by using this management system farmers can achieve a more efficient nitrogen use.Key words: Zea mays L. nitrogen application; phenological stage; slow-release; Abbreviations: N_ nitrogen; V3_ vegetative 3 stage; V8_ vegetative 8 stage; GY_ gain yield; BP_ biological productivity; SP_ straw productivity; HI_ harvest index; NRE_ number of rows per ear; NKR_ number of kernels per row; NKE_ number of kernels per ear; TKW_ thousand-kernel weight; KWE_ kernel weight per ear.

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Influência de fontes e modos de aplicação de nitrogênio nos componentes da produção e produtividade do milho irrigado no cerrado

Cited by 23 publications

References 19 publications

Influência da cobertura do solo e doses de nitrogênio na cultura do milho safrinha

Influência da cobertura do solo e doses de nitrogênio na cultura do milho safrinha

Biological Nitrogen Fixation by Legumes and N Uptake by Coffee Plants

The effect of types and split of urea on yield indicators and yield components of maize

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