EFFECT OF HARVESTING DATES AND STORAGE PERIOD ON SEED YIELD AND SEED QUALITY OF CANOLA (Brassica napus, L.)

Swathing is an important canola (Brassica napus L.) harvest operation in western Canada. The determination of the optimum timing for this operation is worth considering, as premature swathing may lead to reduced seed yield and quality. Seed yield and quality of three canola cultivars (44A89, AC Excel and Ebony), as affected by two seeding dates and several harvest times (six or eight swathing times and one direct combined treatment) was investigated on a Black Chernozem silty loam soil at Melfort, Saskatchewan, Canada, during 1998, 2000 and 2001. Seed yield, weight, protein content (oil-free meal basis) and oil content generally increased with seed development and swathing time. Early seeding was more conducive to achieving higher seed yield, especially in good growing conditions, and resulted in heavier mature seeds with higher oil content. Seed oil composition also changed during seed development. The proportion of oleic (C18:1) and linolenic (C18:3) acids increased, while that of myristic (C14:0), palmitic (C16:0), palmitoleic (C16:1), stearic (C18:0), linoleic (C18:2) and ara chidic (C20:0) acids decreased. The levels of the long chain fatty acids eicosenoic (C20:1) and erucic (C22:1) acids were unaffected. However, the overall amount of fatty acids synthesized (mg 100 seeds-1) increased as seeds matured. Swathing was advantageous over direct combining in preventing weather-induced shattering. Key words: Brassica napus, canola, fatty acid, oil, protein, seed development, seed quality, shattering, direct combining, swathing

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Seed quality of rice cultivars stored in different environments

Journal of Seed Science ◽

10.1590/s2317-15372014000100004 ◽

2014 ◽

Vol 36 (1) ◽

pp. 32-39 ◽

Cited By ~ 3

Author(s):

Elizabeth Rosemeire Marques ◽

Eduardo Fontes Araújo ◽

Roberto Fontes Araújo ◽

Sebastião Martins Filho ◽

Plínio César Soares

Keyword(s):

Seed Quality ◽

Accelerated Aging ◽

Storage Period ◽

Rice Cultivars ◽

Germination Test ◽

Randomized Design ◽

Physiological Quality ◽

Completely Randomized Design ◽

And Storage

The objective of this study was to evaluate dormancy and physiological quality of seeds of rice cultivars during storage in different environments. After harvesting, the seeds of three rice cultivars (Seleta, Curinga and Relâmpago) were dried in the sun, to reach moisture content at around 13%. Then, they were packed in paper and stored in four environments: 5 ± 2 ºC / 70 ± 5% RH, 12 ± 2 ºC / 70 ± 5% RH, 18 ± 2 ºC / 65 ± 5% RH and in uncontrolled condition of temperature and relative humidity (natural). Physiological quality was evaluated at the beginning and at 3, 6, 9 and 12 months of storage by germination test, electrical conductivity, accelerated aging and sand emergence. The experiment was conducted in split plots in a completely randomized design with three replications. Environmental factor was applied in the plots, cultivars in the subplots and storage period in subplots. Cultivar Seleta showed higher dormancy, which was surpassed during storage regardless of environment conservation. In general, seeds stored in natural environment showed lower physiological quality. Only the seeds of cultivar Seleta, regardless of the environment, maintained germination above the minimum required for commercialization until six months of storage.

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Influence of plant extracts, storage containers and storage duration on the physiological quality of watermelon (Citrullus lanatus (Thunb.) Mansf.) seeds stored under ambient conditions

Acta agriculturae Slovenica ◽

10.14720/aas.2020.116.2.1440 ◽

2020 ◽

Vol 116 (2) ◽

pp. 229

Author(s):

Tolulope Olaitan KEHINDE ◽

Olatunde Azeez BHADMUS ◽

Joseph OLUFELO

Keyword(s):

Seed Quality ◽

Storage Period ◽

Ambient Conditions ◽

Storage Duration ◽

Seedling Vigour ◽

Storage Container ◽

Storage Containers ◽

And Storage ◽

Water Melon

<p>Watermelon seed being an oily seed is prone to rapid deterioration of its quality, hence maintaining quality during storage is germane. The study therefore investigated the effect of crude plant powder, storage containers and storage duration on the seed quality of two varieties of watermelon seeds. Seed lots each of 100 g of each variety were treated with 10 g of four crude plant powders of clove basil leaf, red chilli pepper fruit, garlic, neem leaf and a synthetic fungicide. All samples were stored in three storage containers (envelope, tin and glass bottle). Treated seeds were stored under ambient conditions for 180 days. Germination and seedling vigour were determined at 180 day time course after storage. Data were subjected to mean separation using Duncan’s Multiple Range Test. Significant differences were observed in the quality traits examined in water melon due to differences in variety, seed treatment, storage container and storage period. ‘Kaolak’ was the best in storage in terms of seedling vigour and viability. Glass bottle was identified as the best storage container in maintaining seed quality of water melon throughout the storage period. The use of organic materials especially neem and clove basil leaf powder proved much better for maintaining germinability and seedling vigour and extension of seed longevity than inorganic material.</p>

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