Influência do nitrogênio e das lâminas de irrigação na qualidade fisiológica das sementes de mamoeiro

Meireles, Robson Celestino; Silva, Roberto Ferreira da; Araújo, Eduardo Fontes; Reis, Luciléa Silva dos; Lyra, Guilherme Bastos; Marinho, Albanise Barbosa

doi:10.1590/s0101-31222009000100024

Cited by 5 publications

(5 citation statements)

References 6 publications

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“…These results in Viçosa partially agree with the results of Meireles et al. (2003) and Leite et al. (2009).…”

Section: Resultssupporting

confidence: 92%

“…In Viçosa, germination of seeds from plants sprayed with Mo increased 4.4 (2017) and 2.7 (2018) percentage points in comparison to that from nonsprayed plants (Figure 1). These results in Viçosa partially agree with the results of Meireles et al (2003) and Leite et al (2009). In these two studies, seed germination and vigor were improved by either 80 or 640 g ha −1 of Mo sprayed over the plants, in comparison with seeds from nonsprayed plants.…”

Section: Effects Of Fertilization On Seed Physiological Qualitysupporting

confidence: 91%

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Split applications of molybdenum fertilizer on common bean increase molybdenum in seed

et al. 2023

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Common bean (Phaseolus vulgaris L.) plants sprayed with molybdenum (Mo) fertilizer produce Mo‐enriched seeds, which may increase yield in Mo‐poor soils. The challenge has been to produce Mo‐enriched seeds with less fertilizer. Split applications of Mo increase seed Mo content (SMoC), but the number of splits that maximize SMoC has not been studied sufficiently. In three sprinkler‐irrigated field trials, we evaluated the effects of split‐applied Mo fertilizer on SMoC and seed physiological quality. All treatments received NPK fertilizer at sowing. In two treatments, 69 kg ha−1 of urea‐N was top‐dressed or not applied. In six treatments, Na2MoO4·2H2O was foliar‐sprayed once at either 90 or 600 g ha−1 of Mo at the 4th trifoliolate leaf (V4) growth stage, or 600 g ha−1 was split equally at V4 and bud initiation (R5); V4, R5, and full flowering (R6); V4, R5, R6, and early pod formation (R7); or V4, R5, R6, and early and late R7 growth stages. Seed yield for each trial ranged from 3723 to 4621 kg ha−1. Site‐treatment interaction was significant for SMoC and seed germination (p < 0.001). SMoC ranged from 0.11 to 0.23 (only NPK‐fertilized), 1.81 to 3.31 (600 g ha−1, no split), and 5.22 to 6.29 μg (four splits). Four and five splits did not differ significantly for any variable. In two trials, seeds from 600 g ha−1 of Mo had a 3.9% higher germination than seeds from 90 g ha−1. In conclusion, SMoC increases as the number of splits increase up to four times. Additionally, Mo applied at 600 g ha−1 may improve seed germination rate.

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“…These results in Viçosa partially agree with the results of Meireles et al. (2003) and Leite et al. (2009).…”

Section: Resultssupporting

confidence: 92%

Section: Effects Of Fertilization On Seed Physiological Qualitysupporting

confidence: 91%

Split applications of molybdenum fertilizer on common bean increase molybdenum in seed

et al. 2023

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“…However, our results contradict the findings of Ahmadvand et al (2012) in soybean and Jankjo et al (2013) in rangeland grasses treated with KNO 3 and positive results were obtained. Meireles et al (2009) reported a negative effect of KNO 3 in the germination of papaya seeds. The positive effects of KNO 3 might be due to nitrate that acts as an oxidization substrate in the metabolic regulatory processes, which involve NADH-NADP in the pentose pathway that metabolizes glucose (Nasri et al, 2014).…”

Section: Discussionmentioning

confidence: 99%

“…Meireles et al. (2009) reported a negative effect of KNO 3 in the germination of papaya seeds. The positive effects of KNO 3 might be due to nitrate that acts as an oxidization substrate in the metabolic regulatory processes, which involve NADH‐NADP in the pentose pathway that metabolizes glucose (Nasri et al., 2014).…”

Section: Discussionmentioning

confidence: 99%

Effect of gibberellic acid and potassium nitrate seed treatments on the emergence and seedling vigor of Amaranth and Cleome gynandra

Tapfumaneyi

Dube

Mavengahama

et al. 2023

Agrosystems Geosci & Env

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Seed dormancy is the major challenge in the cultivation of Amaranth and Cleome gynandra. Amaranth and C. gynandra are affected by chemical, physical, and physiological dormancy. The current study was conducted at the Marondera University of Agricultural Sciences and Technology (MUAST) farm in 2021 and 2022. The effects of gibberellic acid and potassium nitrate seed treatments on the emergence and seedling vigour of Amaranth and C. gynandra were evaluated. Seeds of Amaranth and C. gynandra were pre‐soaked in gibberellic acid (control 0, 100, 200, 300,400, and 500 ppm) and potassium nitrate (control 0%, 0.1%, 0.2%, 0.3%, 0.4%, and 0.5%) solutions for 24 h to have a factorial layout within a randomized complete block design replicated three times. Seeds of Amaranth and C. gynandra treated with gibberellic acid showed a significant difference while potassium nitrate showed no significant difference. The highest emergence percentage and vigor index were recorded in seeds treated with 500 ppm gibberellic acid. The maximum emergence percentages of Amaranth (62.1%) and C. gynandra (60.7%) were obtained in 2022 and 2021. The least emergence percentages of Amaranth (46.4%) and C. gynandra (45.3%) were obtained in control in 2021. The highest vigor index of Amaranth (603) was obtained in 2022, while the highest vigor index of C. gynandra (562) was obtained in 2021. The lowest vigor indices of Amaranth and C. gynandra were 341 and 270, which were recorded in 2021 and 2022. The results showed that gibberellic acid has the potential to reduce seed dormancy.

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“…The increase in yield is related to the quality of the seed offered to the farmer and, therefore, the management of the seed production system must be specialized and efficient, in order to obtain the highest seed quality in terms of vigor. The vigor represents the sum of the physiological attributes of the seed, maintaining relation with the environmental factors, mechanical injury, chemical treatment of seeds and nutrition of the mother plant (Carvalho and Nakagawa, 2012;Meireles et al, 2009;Toledo et al, 2009). The nutrient required in greater quantity by the wheat is the nitrogen, which participates in the formation of amino acids, proteins and the composition of the chlorophyll molecule (Benin et al, 2012;Kutman et al, 2011;Viana and Kihl, 2010).…”

Section: Introductionmentioning

confidence: 99%

April 2021

2021

Aust J Crop Sci

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The objective of this work was to evaluate the influence of nitrogen in association with sulfur applied in the field and the influence of this fertilization on the vigor of wheat seeds produced and later evaluated in the laboratory. Field experiments were carried out in the municipalities of Caibaté-RS and Pelotas-RS using the TBIO Sinuelo cultivar adapted to all the regions of Rio Grande do Sul. The experimental design was a randomized block design with a 2x5x2 trifractory scheme (cultivation environments x doses of nitrogen x sulfur management) with 4 replicates. The treatments consisted of the combination of two cultivation environments [Caibaté-RS and Pelotas-RS], five nitrogen doses Urea 45%, [0; 22.5; 45; 67.5 and 90 kg ha-1] applied at the beginning of tillering and sulfur, Sulfuric 90% sulfur, [0 and 60 kg ha-1] applied before sowing, about 7 days. After reaching physiological maturity, the seeds were harvested manually and taken to the seed laboratory. The seeds were dried in a forced ventilation oven at 41ºC until the moisture content stabilized at 12% (wet bulb). We evaluated the first germination count (FGC), accelerated aging (AA), field emergence (FE), shoot length (RL) and seedling root length (SL). The seeds produced in Caibaté-RS have greater vigor in relation to Pelotas-RS. Nitrogen fertilization favors the production of seeds with greater vigor, while sulfur can influence the vigor according to the environment in which the plants are cultivated.

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Influência do nitrogênio e das lâminas de irrigação na qualidade fisiológica das sementes de mamoeiro

Cited by 5 publications

References 6 publications

Split applications of molybdenum fertilizer on common bean increase molybdenum in seed

Split applications of molybdenum fertilizer on common bean increase molybdenum in seed

Effect of gibberellic acid and potassium nitrate seed treatments on the emergence and seedling vigor of Amaranth and Cleome gynandra

April 2021

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