Nitrogen preference across generations under changing ammonium nitrate ratios

Daryanto, Stefani; Wang, Lixin; Gilhooly, William P.; Jacinthe, Pierre-André

doi:10.1093/jpe/rty014

Cited by 31 publications

(13 citation statements)

References 46 publications

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“…Solos corrigidos possuem coloides com cargas predominantemente negativas, que repulsam as cargas aniônicas (CRUSCIOL et al, 2011), favorecendo a percolação e o movimento descendente do nitrato. Nesse contexto, a associação de baixas temperaturas com alta precipitação pode reduzir o teor de nitrato no solo (ROSOLEM et al, 2003;DARYANTO et al, 2018).…”

Section: Resultsunclassified

Teores de nitrato e amônio no solo em função de culturas de entressafra da soja e adubação nitrogenada

Balbinot

Yokoyama²,

Ribeiro³

et al. 2019

COLLOQ AGRARIAE

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ResumoO objetivo desse trabalho foi avaliar os teores de nitrato e amônio no solo na entressafra e na safra de soja em função de culturas de entressafra e fertilização com N mineral na soja. O delineamento experimental foi de blocos completos casualizados, com cinco repetições e em esquema de parcelas subdivididas. Nas parcelas foram alocados seis tratamentos de entressafra: pousio, milho segunda safra com 0 ou 80 kg de N ha -1 em cobertura, trigo, Urochloa ruziziensis e Crotalaria spectabilis. Nas subparcelas foram alocados duas adubações de N na implantação da soja (0 e 30 kg de N ha -1 ). De abril de 2016 a fevereiro de 2017 foram realizadas 26 coletas de solo na camada de 0,0-0,1 m, sendo avaliados os teores de nitrato e amônio nas amostras. Durante o período de entressafra da soja, os maiores teores de nitrato no solo foram observados no milho segunda safra adubado com 80 kg de N ha -1 , enquanto os teores de amônio variaram menos entre os tratamentos de entressafra. As culturas de entressafra não influenciaram os teores de nitrato e amônio no solo durante o ciclo da soja em sucessão. Na fase vegetativa da soja, os teores de nitrato no solo foram superiores quando a soja foi adubada com 30 kg de N ha -1 , em relação à ausência de adubação, mas nas fases de formação de vagens e de grãos essa diferença não ocorreu. Palavras-chave: culturas de cobertura; Glycine max L.; manejo do solo; nitrogênio inorgânico no solo; sistema plantio direto. Nitrate and ammonium content in the soil as a function of off-season crops and nitrogen fertilization in the soybean AbstractThe objective of this work was to evaluate the effect of off-season crops and fertilization with N mineral at soybean sowing on the nitrate and ammonium contents in the soil during the off-season and soybean development cycle. The experimental design was of randomized complete blocks, with five replications and in split plod scheme. Six off-season treatments were evaluated in the plots: fallow, maize with 0 or 80 kg of N ha 1 , wheat, Urochloa ruziziensis and Crotalaria spectabilis . In the subplots two levels of N were evaluated in the soybean sowing (0 and 30 kg N ha -1 ). From April 2016 to February 2017, 26 soil samples were collected in the 0.0-0.1 m layer, and the nitrate and ammonium contents in the samples were evaluated. During the off-season, the highest contents of nitrate were observed in maize fertilized with 80 kg de N ha -1 , while ammonium contents varied less among off-season crops. The off-season crops did not influence the soil nitrate and ammonium content during the soybean cycle. In the vegetative phase of soybean, nitrate contents were higher when the soybean received nitrogen fertilization in relation to the absence of fertilization, but in the pod and grain formation there was no effect of the nitrogen fertilization on the contents of inorganic N.

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Section: Resultsunclassified

Teores de nitrato e amônio no solo em função de culturas de entressafra da soja e adubação nitrogenada

Balbinot

Yokoyama²,

Ribeiro³

et al. 2019

COLLOQ AGRARIAE

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“…Despite extensive research conducted over past decades, the concept of preference remains an enigma, a terminology in common usage, yet without definition or clarity. Nevertheless, interest persists, as evidenced by recent literature (e.g., Boschiero, Mariano, & Trivelin, 2018;Cui et al, 2017;Daryanto et al, 2019;Iqbal et al, 2020;Liu et al, 2019;Zhang, Zhao, Chen, Zhang, & Shen, 2019). At first glance, the solution to this question may appear to be straightforward.…”

Section: Introductionmentioning

confidence: 99%

On inorganic N uptake by vascular plants: Can ¹⁵N tracer techniques resolve the NH₄⁺ versus NO₃⁻ “preference” conundrum?

Chalk

2020

European J Soil Science

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The relative uptake by plants of the two ionic nitrogen (N) forms, ammonium (NH4+) and nitrate (NO3−), has been the subject of much interest during the past 50 years, resulting in a considerable scientific literature. The general idea is that plants have choice, resulting in preference for either one mineral N form or the other. Unfortunately, there is no specific definition of preference or agreement on how it should be measured. In this review, we critically examine the alternative techniques that have been used to measure the relative uptake of NH4+ and NO3− by plants, including those based on unlabelled sources, 15N‐enriched mineral N forms and variations in the 15N natural abundance of mineral N sources. The main difficulty with using unlabelled N is the antecedent N in plant tissue prior to the imposition of treatments. Although 15N‐enrichment overcomes this obstacle, it is nevertheless difficult to separate uptake as 15NH4+, uptake as 15NO3− and uptake as 15NO3− derived from the nitrification of 15NH4+. With 15N natural abundance, isotopic fractionation during plant uptake complicates the interpretation of data. There is increasing evidence that plants exhibit flexibility or plasticity with respect to the use of mineral N forms rather than preference.Highlights The concept of plant preference for NH4+ or NO3− forms of mineral N is examined Experiments using 15N‐enrichment and 15N natural abundance are reviewed The direct uptake of 15NO3− is confounded with the uptake of 15NO3− derived from nitrified 15NH4+ Plants exhibit plasticity rather than preference in the acquisition of ammonium and nitrate

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“…Different plants have different preferences for the uptake of NH 4 + and NO 3 − . When both N forms are present, plants preferentially use one of them [5,6]. The absorption of N by plants varies with environmental conditions, such as the N concentration, temperature, and soil pH [7].…”

Section: Introductionmentioning

confidence: 99%

Ammonia–Nitrate Mixture Dominated by NH4+–N Promoted Growth, Photosynthesis and Nutrient Accumulation in Pecan (Carya illinoinensis)

Chen

Zhu

Tan

et al. 2021

Forests

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Although ammonia–nitrogen (NH4+–N) and nitrate–nitrogen (NO3−–N) are the two main forms of N absorbed and utilized by plants, the preferences of plants for these forms are still unclear. In this study, we analyzed the growth, photosynthesis, and nutrients of pecan under different NH4+:NO3− ratios (0/0, 0/100, 25/75, 50/50, 75/25, 100/0) by indoor aerosol incubation. The results showed that additions of different N forms promoted the growth and development of pecan seedlings. When NO3−–N was used as the sole N source, it significantly promoted the ground diameter growth of pecan and increased the leaf pigment content and photosynthetic rate. The NH4+:NO3− ratio of 75:25 and NH4+–N as the sole N source significantly increased the soluble sugars in stems and roots, starch in leaves, stems and roots, soluble protein in leaves and stems, and soluble phenols in stems and roots. Additionally, the NH4+:NO3− ratio of 75:25 increased plant height, leaf number, root soluble protein, and leaf soluble phenol contents. In conclusion, regarding the physiological aspects of pecan growth, pecans are more inclined to use NH4+–N. Considering that the NH4+–N as the only N source may lead to nutrient imbalance or even toxicity, the NH4+:NO3− ratio of 75:25 was most favorable for the growth and development of pecan seedlings.

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Nitrogen preference across generations under changing ammonium nitrate ratios

Cited by 31 publications

References 46 publications

Teores de nitrato e amônio no solo em função de culturas de entressafra da soja e adubação nitrogenada

Teores de nitrato e amônio no solo em função de culturas de entressafra da soja e adubação nitrogenada

On inorganic N uptake by vascular plants: Can ¹⁵N tracer techniques resolve the NH₄⁺ versus NO₃⁻ “preference” conundrum?

Ammonia–Nitrate Mixture Dominated by NH4+–N Promoted Growth, Photosynthesis and Nutrient Accumulation in Pecan (Carya illinoinensis)

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Nitrogen preference across generations under changing ammonium nitrate ratios

Cited by 31 publications

References 46 publications

Teores de nitrato e amônio no solo em função de culturas de entressafra da soja e adubação nitrogenada

Teores de nitrato e amônio no solo em função de culturas de entressafra da soja e adubação nitrogenada

On inorganic N uptake by vascular plants: Can 15N tracer techniques resolve the NH4+ versus NO3− “preference” conundrum?

Ammonia–Nitrate Mixture Dominated by NH4+–N Promoted Growth, Photosynthesis and Nutrient Accumulation in Pecan (Carya illinoinensis)

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On inorganic N uptake by vascular plants: Can ¹⁵N tracer techniques resolve the NH₄⁺ versus NO₃⁻ “preference” conundrum?