Eficiência de uso de nitrogênio em cultivares de trigo pioneiras e modernas

Beche, Eduardo; Benin, Giovani; Bornhofen, Elesandro; Dalló, Samuel Cristian; Sassi, Luiz Henrique Scarparo; Oliveira, Ronaldo de

doi:10.1590/s0100-204x2014001200005

Cited by 14 publications

(8 citation statements)

References 28 publications

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“…Nitrogen use efficiency (NUE) results for modern Brazilian wheat cultivars show that they use N more efficiently and are more tolerant of lower N rates than older cultivars. Furthermore, N uptake and utilization efficiencies are positively associated with NUE (Beche et al, 2014a). When different N rates are applied, N remobilization efficiency was shown to be the main NUE component under both low and high N fertilization conditions (Todeschini et al, 2016).…”

Section: Achieving Genetic Gains and The Way Forwardmentioning

confidence: 97%

“…When different N rates are applied, N remobilization efficiency was shown to be the main NUE component under both low and high N fertilization conditions (Todeschini et al, 2016). Wheat breeding programs should prioritize the selection of genotypes with higher N uptake, remobilization, and utilization efficiencies if cultivars that have better NUE are to be developed (Beche et al, 2014a).…”

Section: Achieving Genetic Gains and The Way Forwardmentioning

confidence: 99%

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Genetic Gain Over 30 Years of Spring Wheat Breeding in Brazil

et al. 2019

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Wheat (Triticum aestivum L.) is one of the most important crops in the world. Brazil is one of the largest importers of this cereal, and wheat breeding programs are attempting to increase productivity and reduce external dependence. The objectives of this study were to quantify the spring wheat genetic gain in Brazil between 1984 and 2014 using data from multienvironment trials, and to verify if the genetic gain stagnated after the 2000s. This study used a highly unbalanced dataset containing grain yield (GY) data from 187 spring wheat trials that were performed at 25 locations between 2002 and 2015. In total, 126 cultivars, released between 1985 and 2014, were evaluated over 14 crop seasons. The cultivar evaluation indicated that there was a genetic gain in GY of 33.9 kg ha−1 yr−1 (r2 = 0.53, P < 0.01), which represents an increase of 1.28% yr−1. The dataset showed a linear regression for the genetic gain and indicates that wheat genetic gain has not stagnated in Brazil after the 2000s.

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Section: Achieving Genetic Gains and The Way Forwardmentioning

confidence: 97%

Section: Achieving Genetic Gains and The Way Forwardmentioning

confidence: 99%

Genetic Gain Over 30 Years of Spring Wheat Breeding in Brazil

et al. 2019

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“…In this case, the response of the plants to the increase in salt concentration, in the form of osmotic adjustment, was associated with a limited absorption of NO 3 and its accumulation in vacuoles (Ding et al, 2010). Additionally, the competition between Cland NO 3 for the same carrier is a factor that directly affected NUE because N absorption and use efficiency depends on the level of availability of this nutrient in the cultivation medium (Beche et al, 2014).…”

Section: Resultsmentioning

confidence: 99%

Ionic relationships between macronutrients and sodium in parsley under nutrient solutions prepared with brackish water

Muchecua

Júnior

Menezes

et al. 2022

Rev. bras. eng. agríc. ambient.

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The concentration and nature of ions directly influence ionic relationships between macronutrients and sodium, especially in the context of plants grown under saline conditions. The goal of this study was to analyze the efficiency of use of N, P, K, Ca, Mg, and S, the efficiency of Na accumulation, and the relationships between Ca+2, Mg+2, Na+, and K+ after analysis of parsley, cultivar Graúda Portuguesa, plant tissues exposed to nutrient solutions prepared with brackish water with different cationic natures. The treatments consisted of exposing plants to nutrient solutions (ECns = 1.7, 2.7, 3.7, 4.7, 5.7, and 6.7 dS m-1) prepared with brackish water obtained by solubilizing different salts, NaCl, CaCl2.2H2O, MgCl2.6H2O, and KCl in supply water (ECw = 0.12 dS m-1). Two cultivation cycles were conducted, adopting a completely randomized experimental design in both (6 × 4 factorial scheme), with four replicates. The efficiency of the use of macronutrients and sodium accumulation was more affected by the cationic nature of the water at the highest concentration levels. Except for the Ca+2 - Mg+2 ratio, all other cationic ratios were affected by the increase in the concentration of salts in the nutrient solution.

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“…Therefore, optimising nutritional efficiency is of great importance, since in general, fertilisers contribute approximately 30% to the total cost of seedling production (Marles, 2017). Currently in Brazil, few studies characterise plants as to nutrient use efficiency; the few results available in the domestic and international literature refer mainly to cereal production (Beche et al, 2014).…”

Section: Resultsmentioning

confidence: 99%

Nutritional Efficiency and Morphophysiological Aspects With Growth in the ‘Okinawa Roxo’ Peach Rootstock

Souza¹,

Ritterbusch²,

Menegatti³

et al. 2019

JAS

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The aim of this study was to evaluate the efficiency of nutrient uptake, accumulation, distribution and use, and its relationship with growth variables, chlorophyll content, and root and shoot dry-weight partitioning in the ‘Okinawa Roxo’ peach rootstock, submitted to different nutrient solutions and substrates. The experimental design was completely randomised, with four treatments and five replications. The treatments were T1: Ns1 = Souza et al. nutrient solution (2011), applied to a sand substrate; T2: Ns2 = Hoagland and Arnon (1950), applied to a sand substrate; T3: Commercial Substrate + H2O; and T4: Control, Sand + H2O. Ninety days after transplanting (DAT), morphological, physiological and nutritional parameters were determined in the ‘Okinawa Roxo’ rootstock, together with the correlation between nitrogen concentration and nitrogen balance index, and the chlorophyll content and index. The greatest zinc content was detected in the shoots of the ‘Okinawa Roxo’ plants, at more than 80% of the accumulated total. Treatments T1 and T2 (nutrient solutions Ns1 and Ns2 respectively) made it possible to obtain ‘Okinawa Roxo’ plants with the best morphophysiological characteristics, being ready for grafting three months after transplanting in a greenhouse. The use of the Ns1 nutrient solution resulted in greater efficiency in the uptake and use of the nutrients nitrogen (N), potassium (K) and iron (Fe). The N and Total Chlorophyll concentrations in the leaves of the red-leaved peach tree can be estimated indirectly with a chlorophyll meter, and are an accurate indication of the nutritional status of the plant in relation to nitrogen content.

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Eficiência de uso de nitrogênio em cultivares de trigo pioneiras e modernas

Cited by 14 publications

References 28 publications

Genetic Gain Over 30 Years of Spring Wheat Breeding in Brazil

Genetic Gain Over 30 Years of Spring Wheat Breeding in Brazil

Ionic relationships between macronutrients and sodium in parsley under nutrient solutions prepared with brackish water

Nutritional Efficiency and Morphophysiological Aspects With Growth in the ‘Okinawa Roxo’ Peach Rootstock

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