Wheat yield and seed physiological quality affected by initial seed vigor, sowing density, and environmental conditions

Marinho, Jéssica de Lucena; Silva, Sérgio Ricardo; Souza, Diogo Nascimento de; Fonseca, Inês Cristina de Batista; Bazzo, José Henrique Bizzarri; Zucareli, Claudemir

doi:10.5433/1679-0359.2021v42n3supl1p1595

Cited by 6 publications

(6 citation statements)

References 18 publications

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“…This difference in the performance of seedlings between the lots with contrasting vigor was also reported by Abati et al (2018) and Marinho et al (2021), who observed, in separate studies conducted on wheat, that the use of vigorous seeds resulted in a greater number of emerged seedlings compared to the use of non-vigorous seeds. This is because high-vigor seeds have a higher rate of seedling development in the field, even under unfavorable conditions, which results in an adequate initial establishment (Carvalho;Nakagawa, 2012;Garcia;Coelho, 2021).…”

Section: Resultssupporting

confidence: 76%

“…When Zhao et al (2019) evaluated the effect of vigor on wheat cultivated in rainfed areas, the authors reported that the effect of vigor was strongly influenced by the temperature fluctuations occurring in the environment of the study region. Marinho et al (2021) reported that the effect of vigor on the initial establishment of seedlings was further pronounced under unfavorable conditions of temperature variations. Therefore, it may be stated that the use of vigorous seeds is essential for establishing an adequate population of plants even under stressful conditions (Finch-Savage;Bassel, 2016).…”

Section: Resultsmentioning

confidence: 99%

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Sowing density adjustment by rice seed vigor

et al. 2022

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The use of high-vigor seeds combined with seeding density adjustment at sowing is speculated to ensure high yields. However, certain doubts regarding the effect of this combined approach on rice cultivation remain owing to the tillering capacity. In this context, the present study aimed to determine the effects of seeding density adjustment according to vigor on the initial establishment of seedlings in the field. A physiological characterization was conducted using the germination test, vigor by accelerated aging, electrical conductivity, first count, shoot length, root length, total seedling length, and dry mass in the 2019/2020 and 2020/2021 growing seasons. The evaluations were conducted using a completely randomized design with four replications. Subsequently, the seed lots were selected, from which a fraction of seeds were submitted to artificial vigor reduction. Afterward, these seeds were sown in the main producing regions of the state of Santa Catarina, under a randomized block design with four replications. Three treatment groups were formed: one without density adjustment, one with adjustment by germination, and one with adjustment by vigor in accelerated aging. Twenty-one days after sowing, the number of emerged seedlings per unit area was determined. An interaction between the factors of adjustment for density and seed quality was observed. This was evidenced in the fact that even with the adjustment of density by vigor, the seed lot with lower quality presented the emergence of a lower number of seedlings, and the performance of these seeds was not equivalent to that observed in the lot with superior quality. Accordingly, it was concluded that the seeding density adjustment by vigor combined with the use of seeds with high-vigor is a suitable strategy for achieving a significant increase in plant emergence during the initial establishment in the field.

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Section: Resultssupporting

confidence: 76%

Section: Resultsmentioning

confidence: 99%

Sowing density adjustment by rice seed vigor

et al. 2022

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“…The study by Pinheiro et al [39] clearly shows an increase in the number of non-productive tillers as the sowing density of wheat increases. Marinho et al [40] prove that competition between plants and tillers can increase the incidence of infertile tillers, especially at high sowing densities.…”

Section: Morphological and Agronomic Traitsmentioning

confidence: 99%

Response of Indian Dwarf Wheat and Persian Wheat to Sowing Density and Hydrothermal Conditions of the Growing Seasons

et al. 2022

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The need for foods with high nutritional value has led to the rediscovery of ancient wheat species Triticum sphaerococcum and T. persicum as raw materials with valuable consumption properties, but their reintroduction requires assessment of their productivity under different agricultural practices. The field experiments were carried out for three years (2018–2020) to test the hypothesis that the sowing density of T. sphaerococcum and T. persicum (400, 500 and 600 no m−2) will affect their agronomic traits, yield and occurrence of diseases, but the response will depend on the hydrothermal conditions of the growing seasons. In this study, a significant correlation of the grain yield with the amount of precipitation in tillering, and from booting to the beginning of fruit development was demonstrated. The sowing density of T. sphaerococcum had an impact on the grain yield only under moderate drought stress during the growing season (2019), when the highest yield was obtained at a sowing density of 600 m−2. In 2019, the most favorable sowing density was also the highest for T. persicum. In the year with the lowest amount of rainfall during the growing season (2018), the yield of T. persicum was the highest in the lowest sowing density. At the shooting stage, a greater intensity of powdery mildew was observed on T. persicum, especially with higher sowing densities. Increasing the sowing density also increased the occurrence of root rot symptoms in both wheat species in the year that favored the occurrence of this disease (2018). It can be concluded that in the integrated low-input cultivation of T. sphaerococcum and T. persicum, it is justified to use a sowing density of 600 pcs. m−2, in an agroclimatic zone with moderate droughts during the growing season.

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“…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%

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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Wheat yield and seed physiological quality affected by initial seed vigor, sowing density, and environmental conditions

Cited by 6 publications

References 18 publications

Sowing density adjustment by rice seed vigor

Sowing density adjustment by rice seed vigor

Response of Indian Dwarf Wheat and Persian Wheat to Sowing Density and Hydrothermal Conditions of the Growing Seasons

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

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