Vigor de sementes e adubação nitrogenada na produtividade e qualidade fisiológica de sementes de trigo

Bazzo, José Henrique Bizzarri; Garcia, Emanueli Bastos; Marinho, Jéssica de Lucena; Gomes, Diogo; Silva, Sérgio Ricardo; Zucareli, Claudemir

doi:10.32929/2446-8355.2021v30n1p39-50

Cited by 5 publications

(7 citation statements)

References 7 publications

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“…In addition, the use of vigorous seeds in the crop establishment reflects on the yield and quality of the final product. Bazzo et al (2021) studied the effects of initial seed vigor on plant performance and wheat seed production and observed that seeds from plants established with high-vigor seeds had higher physiological quality, corroborating results obtained in this study.…”

Section: Physiological Potential Of Seedssupporting

confidence: 84%

Wheat yield and seed physiological quality as influenced by seed vigor, nitrogen fertilization and edaphoclimatic conditions

Souza¹,

Seeds²

2021

Semina: Ciênc. Agrár.

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Wheat is one of the most important cereals grown in the world, and in Brazil, increasing national production is still a challenge. Nitrogen (N) supply can favor grain yield and the physiological quality of wheat seeds. However, the definition of adequate N rate and fertilization timing must consider genotype, cultivation environment, and initial seed vigor level. The aim of this work was to evaluate the effect of initial seed vigor and the combinations of rates and timings of N application on grain yield and seed physiological quality of wheat cultivars under different edaphoclimatic conditions. The experiment was carried out in Londrina and Ponta Grossa, state of Paraná, in a randomized block design in a 2 × 2 × 7 factorial scheme, with four replicates. Treatments consisted of two seed vigor levels (vigorous and non-vigorous seeds), two wheat cultivars (BRS Gralha-Azul and BRS Sabiá) and seven combinations of fertilization timings and N rates (kg ha-1) (control-0N; 20N at sowing and 60N at tillering; 40N at sowing; 80N at sowing; 40N at sowing and 40N at tillering; 40N at tillering; 80N at tillering). Number of emerged seedlings, vegetation index, shoot dry matter, number of fertile spikes m-2 and grain yield were evaluated. Additionally, the physiological potential of seeds produced in Londrina was evaluated by the testes of first count, germination, seedling emergence in sand and emergence speed index. The climatic conditions during the experiment, in both cultivation environments, were similar to average historical records, with some periods of water deficit. The highest grain yield was obtained with the BRS Gralha-Azul in Londrina, and with BRS Sabiá in Ponta Grossa. The use of vigorous seeds favored the stand establishment and the response of plants to N fertilization. The treatments 40N + 40N, and 40N + 0N favored the majority of evaluated variables. Both cultivars showed potential for the production of high physiological potential seeds in Londrina environment. Inadequate N supply impairs wheat grain yield and seed production.

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Section: Physiological Potential Of Seedssupporting

confidence: 84%

Wheat yield and seed physiological quality as influenced by seed vigor, nitrogen fertilization and edaphoclimatic conditions

Souza¹,

Seeds²

2021

Semina: Ciênc. Agrár.

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“…Considering that the maximum economic efficiency is generally obtained by farmers with agronomic practices that provide 90% of the maximum seed yield, it is estimated that 18 kg.ha −1 N would be needed to achieve it. These results reinforce that suitable N availability is essential to increase seed yield and, therefore, N fertilization must be properly managed for wheat crop feasibility (Bazzo et al, 2016;Bazzo et al, 2021;Ferreira et al, 2021). Alves et al (2017) studied N fertilization in wheat crop and observed that N rates up to 120 kg.ha −1 promoted an increase in grain yield, corroborating the current results achieved in Ponta Grossa.…”

Section: Resultssupporting

confidence: 72%

“…Concerning the 'N rate' factor, the results reinforce the importance of N for seed commercial production since the amount of N taken up by the plant during its cycle has a positive correlation with the physiological quality of the produced seeds (Carvalho and Nakagawa, 2012;Bazzo et al, 2021). However, the results also show that high N rates applied to the crop might impair the physiological quality of the produced seeds, as the excess of N may cause several damages to the plant such as cell toxicity (Elhanafi et al, 2019) and increased lodging (Galetto et al, 2017), which impair seed formation.…”

Section: Discussionmentioning

confidence: 60%

“…Despite the availability of studies on the effects of sowing density (Cardoso et al, 2021;Marinho et al, 2021) or N rate (Souza et al, 2021;Bazzo et al, 2021) on the physiological quality of wheat seeds, there are no scientific studies on the interaction between these two factors influencing the quality of wheat seeds under subtropical conditions in Brazil. Thus, the authors hypothesized that there is an optimal combination between sowing density and N rate for each wheat genotype in each edaphoclimatic environment.…”

Section: Introductionmentioning

confidence: 99%

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Nitrogen fertilization and sowing density on yield and physiological quality of wheat seeds

et al. 2022

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The optimal combination between sowing density and nitrogen (N) fertilization rate is a challenge for the production of high-quality seeds, considering the diversity of genotypes and environments. This study aimed to evaluate the yield and physiological quality of wheat seeds as a function of sowing density and N rate, under different edaphoclimatic conditions. The experiment was carried out in three environments (Londrina, Cascavel, and Ponta Grossa) in a randomized block design with four replications, considering a 2 × 3 × 4 factorial arrangement composed of two genotypes (BRS Anambé and WT 15-025), three sowing densities (250, 350, and 450 seeds.m−2), and four N rates (0, 40, 80, and 120 kg.ha−1). The following seed features were evaluated: yield, first germination count, final seed germination, seedling emergence, emergence speed index, seedling length, and seedling dry matter. Seed yield varied as a function of environment and genotype. BRS Anambé produced seeds with higher physiological quality. The optimal combination between sowing density and N rate that provided the more suitable economic yield, without affecting the physiological quality of wheat seeds, varied with the environment and was estimated in 250 seeds.m−2 × 0 kg.ha−1 N for Londrina and Cascavel, and 350 seeds.m−2 × 18 kg.ha−1 N for Ponta Grossa.

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“…Using the wheat cultivar Quartz, Bazzo et al (2020) applied N to foliar and soil cover and observed no increase in K in the leaves. The non-interference of N applied at the concentration of K is explained by the fact that this nutrient is not a part of the carbohydrate molecules in cereal grains, but is a factor in coenzymes and the establishment of cell turgor (TAIZ et al, 2017).…”

Section: Potassium Concentration In the Leavesmentioning

confidence: 99%

Nitrogen and potassium interaction in oxisol soils under BRS 394 wheat cultivation

Paludo,

Bonfim-Silva,

Silva

et al. 2024

Rev. Caatinga

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Potassium and nitrogen are essential nutrients and their uptake and distribution within plants must be coordinated for optimum growth and development. We evaluated the interaction between nitrogen and potassium fertilization on the development of BRS 394 wheat, and the nitrate and ammonium levels in Oxisol soils. A 52 factorial design was used in a greenhouse experiment, with four replicates in randomized blocks, corresponding to five doses of nitrogen (0, 70, 140, 210, and 280 mg dm-3) and five doses of potassium (0, 50, 100, 150, and 200 mg dm-3). The variables analyzed were shoot dry mass; chlorophyll index; nitrate reductase; nitrogen, potassium, and protein concentrations in the leaves; and nitrate and ammonium levels in the soil. There was an interaction between nitrogen and potassium doses on the chlorophyll index, with nitrogen doses between 152.67 and 163.53 mg dm-3 and potassium of 191.50 mg dm-3 providing the highest chlorophyll index. The other variables were influenced separately by the nitrogen dose. The highest nitrate reductase enzyme activity was 1.30 µmol NO h-1 g-1 Fresh Matter, which was reached at a nitrogen dose of 95 mg dm-3. Shoot dry mass, concentrations of nitrogen and total protein in the leaves, and concentrations of nitrate and ammonium in the soil were adjusted to the linear regression model as a function of nitrogen fertilization. The dose of nitrogen that promoted the best development of BRS 394 wheat and the highest concentrations of nitrate and ammonium in Oxysol soils was 280 mg dm-3.

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Vigor de sementes e adubação nitrogenada na produtividade e qualidade fisiológica de sementes de trigo

Cited by 5 publications

References 7 publications

Wheat yield and seed physiological quality as influenced by seed vigor, nitrogen fertilization and edaphoclimatic conditions

Wheat yield and seed physiological quality as influenced by seed vigor, nitrogen fertilization and edaphoclimatic conditions

Nitrogen fertilization and sowing density on yield and physiological quality of wheat seeds

Nitrogen and potassium interaction in oxisol soils under BRS 394 wheat cultivation

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