Nitrogen fertilization management for no-till cereal production in the Canadian Great Plains: a review

Malhi, S. S.; Grant, C. A.; Johnston, Adrian; Gill, K. S.

doi:10.1016/s0167-1987(01)00176-3

Cited by 254 publications

(190 citation statements)

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“…Urease inhibitors are substances that reduce the rate of hydrolysis of urea -CO (NH 2 ) 2 , which allows for greater percolation of urea in the soil profile, reducing the concentration of NH 3 on the soil surface which therefore reduces the volatilization NH 3 (Malhi et al, 2001). Among the inhibitors of urease currently researched, N-(n-butyl) thiophosphoric triamide (NBPT) stands out as one of the most promising (Krajewska, 2009).…”

Section: Introductionmentioning

confidence: 99%

“…The NBPT can be a viable alternative to minimize volatilization of NH 3 (Malhi et al, 2001), but its effectiveness has not been proven for most crops and conditions in Brazil. Therefore, the aim of this study was to evaluate the performance of wheat 'Pioneiro' (Triticum aestivum L.) subjected to fertilization with urea or urea + NBPT, single or split applied.…”

Section: Introductionmentioning

confidence: 99%

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Urease inhibitor (NBPT) and efficiency of single or split application of urea in wheat crop

et al. 2014

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RESUMOInibidor de urease (NBPT) e a eficiência da ureia aplicada em dose única ou parcelada na cultura do trigo O NBPT (N-(n-butil) tiofosfórico triamida) é uma substância inibidora da urease, que se vem apresentando como das mais promissoras para a maximização do uso do nitrogênio da ureia em sistemas agrícolas. O objetivo deste estudo foi avaliar o desempenho produtivo do trigo irrigado, submetido à fertilização com ureia ou ureia+NBPT aplicadas em dose única ou parcelada. O experimento foi conduzido, de junho a outubro de 2006, em Viçosa-MG, Brasil. Seguiu-se o esquema fatorial 2×2, em que a ureia ou ureia+NBPT foram combinadas com duas formas de aplicação: dose total na semeadura (60kg ha -1 ) ou parcelada (20kg ha -1 na semeadura + 40kg ha -1 , em cobertura, no perfilhamento). O delineamento experimental foi o de blocos ao acaso com dez repetições. Conclui-se que o parcelamento da fertilização nitrogenada não promove incremento de produtividade do trigo, sob as condições de cultivo empregadas; o uso de inibidor de urease aumenta a produtividade da cultura do trigo, quando a ureia é aplicada, em cobertura, durante o perfilhamento, mas, seu uso não promove aumento da produtividade quando a ureia é aplicada no sulco, durante a semeadura. Palavras-chave:Triticum aestivum L., nitrogênio, volatilização de amônia. Received: 20/09/2012; Approved:20/02/2014 Urease inhibitor (NBPT) and efficiency of single or split application of urea in wheat crop 1 NBPT (N-(n-butyl) thiophosphoric triamide), a urease inhibitor, has been reported as one of the most promising compounds to maximize urea nitrogen use in agricultural systems. The objective of this study was to evaluate the performance of irrigated wheat fertilized with urea or urea + NBPT as single or split application. The experiment was conducted from June to October 2006 in Viçosa, MG, Brazil. The experimental design followed a 2×2 factorial scheme, in which urea or urea + NBPT were combined with two modes of application: full dose at sowing (60kg ha -1 ) or split (20kg ha -1 at sowing + 40kg ha -1 as topdressing at tillering), in randomized blocks with ten replications. The split application of nitrogen fertilization does not improve the yield wheat under used conditions. The use of urease inhibitor improves the grain yield of wheat crop when urea is applied in topdressing at tillering, but its use does not promote difference when urea is applied in the furrow at planting.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Urease inhibitor (NBPT) and efficiency of single or split application of urea in wheat crop

et al. 2014

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“…O sistema de preparo de solo, além de influenciar a demanda da cultura por nutrientes e o seu Acta Scientiarum: Agronomy Maringá, v. 25, n. 1, p. 73-80, 2003 suprimento pelo solo, pode, também, afetar o potencial de perdas de N por meio de volatilização, imobilização, desnitrificação e lixiviação (Malhi et al, 2001). Há necessidade, portanto, de se adaptar para cada sistema a maneira mais adequada de fornecimento para se ter o uso mais eficiente de fertilizantes.…”

Section: Introductionunclassified

Qualidade de sementes de trigo e de soja em função de sistemas de preparo de solo e da sucessão de culturas

Nakagawa

Gaspar

Santos³

et al. 2003

Acta Sci. Agron.

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RESUMO.Este trabalho teve como objetivo avaliar algumas características físicas e fisiológicas de sementes de trigo e de soja cultivadas em sucessão, obtidas a partir de quatro sistemas de preparo de solo instalados após o cultivo de crotalária ou de guandu. Os sistemas de preparo para o trigo foram: 1. semeadura direta; 2. semeadura direta + 40 kg/ha de N em cobertura; 3. gradagem e 4. aração, seguindo-se a soja com: 1. semeadura direta; 2. semeadura direta; 3. escarificação e 4. aração. A cultivar de trigo IAC-24 foi semeada em 13/04/98 e colhida em 21/08/98. Avaliaram-se a pureza física, o peso hectolítrico, a massa de 1000 sementes, o teor de água, a porcentagem de germinação e o vigor dessas sementes. A soja, cv. IAC-17, com semeadura em 23/10/98 e colheita em 29/03/99, teve suas sementes avaliadas quanto ao tamanho, massa de 100 sementes, teor de água, germinação e vigor. Os sistemas de preparo de solo e de sucessão, apesar de terem afetado algumas características físicas das sementes produzidas de trigo e de soja, influenciaram muito pouco a qualidade fisiológica.Palavras-chave: trigo, soja, sementes, sucessão de cultura, adubo verde, preparo de solo.ABSTRACT. Wheat and soybean seeds quality performance for tillage systems and crops succession. The aim of this work was to evaluate some physical and physiological characteristics of wheat and soybean seeds produced under four tillage systems and in succession after pigeonpea or sunnhemp crops. The tillage systems used for wheat were: 1. No tillage; 2. No tillage + 40 kg/ha of N top dressing; 3. disk harrow; 4. disk plow, following the soybean with: 1. No tillage; 2. No tillage; 3. chisel; 4. disk plow. The wheat, cv. IAC-24, was sowed in 13 th of April 1998 and harvested in 21 st of August 1998. The wheat seeds quality was evaluated by physical purity, hectolitric weight, moisture content, 1000 seeds weight, germination and vigor. The soybean, cv. IAC-17, was sowed in 23 rd of October 1998 and harvested in 29 th of March 1999. The size of the seeds, the 100 seeds weight, the moisture content, the germination and the vigor of the seeds of soybean were studied. The tillage systems and the succession kind had influences on some physical characteristics of seeds, but few effects on the physiological quality of soybean and wheat seeds.

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“…Therefore, the microclimate of the soil surface under ZT is less favorable for soil decomposition than that of the soil under CT (Malhi et al, 2001). The impact of the presence of residues on N dynamics in the soil is illustrated by the results of Nyborg and Malhi (1989), who observed that the contents of NO 3 -in the soils was greater under CT than under ZT, suggesting a higher activity of mineralization.…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, less N is immobilized in soils when the residues from the preceding crop are removed. Based on this, Malhi et al (2001) suggested that a reduction in the mineralization capacity of nitrogen, a larger immobilization of N and a higher crop yield in soils under ZT might generate a N deficit.…”

Section: Introductionmentioning

confidence: 99%

Nitrification potential, dehydrogenase activity and microbial biomass in an argiudol soil cultivated with wheat under two tillering methods

Diosma

Golik

Chidichimo

et al. 2003

Span. j. agric. res.

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The purpose of this work was to analyze the dynamics of soil biomass and its activity in a soil fertilized with N andcultivated under conventional or zero tillage systems. The soil under conventional tillage had larger biomass than underzero tillage but, in this latter condition, it was further increased by the N-fertilization. Dehydrogenase activity inthe soil was identical under both management systems suggesting similar levels of activity. In addition, fertilizationdid not modify the nitrogen mineralization capacity of the soil. Only the addition of calcareous NH4NO3, a fertilizerthat releases nitrogen much faster than urea, resulted in the immobilization of nitrogen during wheat tillering, whereasurea did not alter soil N mineralization. The lack of a significant biomass response to tilling practices was reflectedby the wheat biomass and grain yield, that was the same under both tilling systems. Only the total N content of wheatwas higher under zero tillage than under conventional management, although this did not result in an increment ingrain yield.

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Nitrogen fertilization management for no-till cereal production in the Canadian Great Plains: a review

Cited by 254 publications

References 56 publications

Urease inhibitor (NBPT) and efficiency of single or split application of urea in wheat crop

Urease inhibitor (NBPT) and efficiency of single or split application of urea in wheat crop

Qualidade de sementes de trigo e de soja em função de sistemas de preparo de solo e da sucessão de culturas

Nitrification potential, dehydrogenase activity and microbial biomass in an argiudol soil cultivated with wheat under two tillering methods

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