Testes de vigor em função de diferentes épocas de colheita de sementes de cevada (Hordeum vulgare L.)

Tunes, Lilian Madruga de; Barros, Antônio Carlos Souza Albuquerque; Badinelli, Pablo Gerzson; Olivo, Franciéle

doi:10.5039/agraria.v3i4a354

Cited by 4 publications

(4 citation statements)

References 2 publications

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“…Seeds harvested with 35.2 % of moisture content, when subjected to drying air temperatures below 40 ºC, had higher 1,000-seed weight and, regardless of the drying air temperature, reached a higher hectoliter weight, if compared to the other harvests. These results agree with Tunes et al (2008), who found that the delay in the harvest of barley seeds caused a reduction in the 1,000-seed weight and hectoliter weight. The delay in harvesting seeds makes them susceptible to relative moisture and air temperature changes, accelerating the process of respiration and degradation of reserves, reflecting in lower values of 1,000-seed weight and hectoliter weight (Peske & Barros 2006).…”

Section: Resultssupporting

confidence: 83%

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Moisture content at harvest and drying temperature on bean seed quality

Scariot

Tiburski

Júnior

et al. 2017

Pesqui. Agropecu. Trop.

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The physical quality and physiological performance of seeds may be influenced by numerous factors, including the moisture content at harvest and drying temperature. This study aimed at evaluating the physical quality and physiological performance of black bean seeds (BRS Campeiro cultivar), depending on the moisture content at harvest and drying air temperature. The experiment was conducted under a completely randomized design, in a 3 x 5 (moisture content at harvest x drying air temperature) factorial arrangement, with four replications. The samples were collected when the seeds reached the moisture contents of 35.2 %, 25.2 % and 16.6 %. After harvesting, the seeds were subjected to drying at temperatures of 30 ºC, 35 ºC, 40 ºC, 45 ºC and 50 ºC. The physical quality of the seeds was evaluated by determining the 1,000-seed weight and hectoliter weight. The physiological performance was evaluated by the germination speed index, germination first count, accelerated aging, dry matter, seedling shoot and root length and electrical conductivity. The increase in the drying temperature, regardless of the moisture content at harvest, reduces the physical quality and physiological performance of the seeds. When subjected to drying temperatures lower than 40 ºC, the seeds obtained from the earliest harvests show a better physical quality and physiological performance.

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Section: Resultssupporting

confidence: 83%

“…This fact can be attributed to the deterioration of the seeds in the field, due to the delay in harvesting. A similar result was obtained by Tunes et al (2008), in barley seeds, who observed a negative effect of delayed harvest on the first count.…”

Section: Resultssupporting

confidence: 70%

Moisture content at harvest and drying temperature on bean seed quality

Scariot

Tiburski

Júnior

et al. 2017

Pesqui. Agropecu. Trop.

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“…Fifty seeds/repetition were placed, rolled and conditioned in a germinator at a temperature of 25 ± 2ºC. Readings were taken on the seventh day after sowing, computing the percentages of normal, abnormal and dead seedlings (Tunes, et al, 2008).…”

Section: Methodsmentioning

confidence: 99%

“…First count: It was conducted together with the germination test, and the evaluation was carried out on the fourth day of setting up the germination test. The percentage of normal seedlings was calculated (Tunes, et al, 2008) Accelerated aging: For accelerated aging, 250 seeds/repetition were distributed on the surface of a metallic screen fixed and suspended inside a plastic box -gerbox, with 40 mL of water, and kept at 41 ºC and 100% relative humidity, for 72 hours in germinator (Assis & Dalastra, 2021). After this period, the seeds were submitted to the germination test.…”

Section: Methodsmentioning

confidence: 99%

Physiological Quality of Treated and Stored Barley Seeds

Bravo,

Vaz,

Santos

et al. 2024

JSD

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Industrial seed treatment (IST) is used in some grain crops. However, the products used often impair the quality of seeds, especially insecticides. In the case of barley seeds, investigative studies on the use of IST are scarce. The present study aimed to evaluate the influence of IST with the fungicide (Iprodione) and insecticide (Thiamethoxan) products, mixed or not, on the physiological quality of barley seeds, before and after storage for two months. A completely randomized design was used, in a 4x2 factorial scheme, with four replications. The treatments consisted of four combinations of applications carried out via IST on barley seeds, of chemical pesticides (fungicide/insecticide), alone or in mixtures, as follows: {T1 – fungicide Iprodione (Rovral); T2 – Thiamethoxan insecticide (Cruizer); T3 – mixture of fungicide/insecticide products (Iprodione + Thiamethoxan); T4 – Control)}, submitted to storage for two months, with evaluations carried out at T0 (treated and analyzed seeds) and T1 (treated seeds stored for 60 days). The following tests were carried out: water content, germination, first count, accelerated aging, seedling length, seedling dry mass. It was concluded that the germination of barley seeds treated with the fungicide Iprodione (Rovral®) and the insecticide Thiamethoxan (Cruizer®), alone and in a mixture applied via IST, maintained the physiological quality of the seeds within the standards for commercialization until 60 days of storage. The use of the insecticide Thiamethoxan (Cruizer®) via IST showed greater damage to the physiology of barley seeds during storage (60 days), applied alone or in a mixture with the fungicide Iprodione (Rovral ®).

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Salicylic acid and polymer on the quality of cowpea seeds grown under water deficit

Gonçalves,

Sousa,

Lima

et al. 2024

Rev. bras. eng. agríc. ambient.

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Cowpea is the third most cultivated legume in the world, and its cultivation can be intended for both grains and seeds. Plants intended for seed production, when exposed to water deficit, may compromise their physical and physiological quality, necessitating the development of strategies to minimize their damage, such as the application of salicylic acid and HumigelPlus® polymer. The objective of this study was to evaluate salicylic acid and HumigelPlus® polymer concentrations to reduce the effects of water deficit on the physical and physiological quality of cowpea seeds. The landrace cowpea seeds used in this study were sourced from two field experiments (Summer and spring). The treatments consisted of five concentrations of salicylic acid (0, 0.29, 1, 1.71, and 2 mM) and five concentrations of HumigelPlus® polymer (0, 0.29, 1, 1.71, and 2%) combined according to the Central Composite Design and a control group (absence of water deficit and application of salicylic acid and HumigelPlus® polymer). The values of electrical conductivity, germination, emergence, weight, and water content of cowpea seeds were higher with the application of salicylic acid (mM) and HumigelPlus® polymer (%) concentrations between 0.29 and 2, regardless of the season. The application of salicylic acid (mM) and HumigelPlus® polymer (%) concentrations between 0.29 and 2, both in summer and spring cultivation, reduces the effects of water deficit on the physical and physiological quality of cowpea seeds.

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Testes de vigor em função de diferentes épocas de colheita de sementes de cevada (Hordeum vulgare L.)

Cited by 4 publications

References 2 publications

Moisture content at harvest and drying temperature on bean seed quality

Moisture content at harvest and drying temperature on bean seed quality

Physiological Quality of Treated and Stored Barley Seeds

Salicylic acid and polymer on the quality of cowpea seeds grown under water deficit

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