scholarly journals FACTORS AFFECTING THE VIABILITY AND GERMINATION BEHAVIOR OF CONIFEROUS SEED. V. SEED MOISTURE CONTENT DURING STRATIFICATION AND SECONDARY STORAGE, PSEUDOTSUGA MENZIESII (MIRB.) FRANCO

1962 ◽  
Vol 38 (3) ◽  
pp. 303-312 ◽  
Author(s):  
G. S. Allen
Keyword(s):  
Moisture Content ◽  
Pseudotsuga Menziesii ◽  
Douglas Fir ◽  
Secondary Storage ◽  
Seed Moisture Content ◽  
Factors Affecting ◽  
Seed Moisture ◽  
And Storage ◽  
Post Stratification

Two seedlots of Douglas fir were each soaked to two levels of moisture content, stratified for 20-120 days at 0-2 °C., subjected to post-stratification storage, and incubated at 10°, 15°, and 25 °C. The higher moisture content (60-70 per cent) was superior for both seedlots particularly when the seed was subjected to drying and storage after stratification. The ability of Douglas fir seed to withstand stratification, drying, and storage for a total time of 240 days, without loss of germinative capacity or vigor, is shown.

INTRODUCING IMPROVED CULTIVARS: UNDERSTANDING FARMERS' SEED DRYING AND STORAGE PRACTICES IN CENTRAL GHANA

2007 ◽  
Vol 43 (3) ◽  
pp. 301-317 ◽  
Author(s):  
R. K. BAM ◽  
P. Q. CRAUFURD ◽  
P. T. DORWARD ◽  
E. A. ASIEDU ◽  
F. K. KUMAGA ◽  
...  
Keyword(s):  
Moisture Content ◽  
Seed Quality ◽  
Upland Rice ◽  
Storage Pests ◽  
Participatory Varietal Selection ◽  
Seed Moisture Content ◽  
Seed Moisture ◽  
Traditional Cultivars ◽  
Improved Cultivars ◽  
And Storage

Improved upland rice cultivars introduced in Volta Region, Ghana, have been perceived to store poorly compared to farmers' traditional cultivars. A survey was conducted in 2003 in the Hohoe district of this region, where a Participatory Varietal Selection programme had started in 1997, to gain insight into farmers' seed production and storage practices that are likely to affect seed quality in storage. Farmers rated keeping quality (p < 0.001), tolerance to storage pests (p < 0.001), seed quality (p < 0.001) and establishment of their local cultivars Kawomo, Viono and Wuwulili as much better than the improved cultivar IDSA 85. Initial seed moisture content ranged from 12.8 to 18% and germination from 0 to 82%. There was a significant relationship between seed moisture content and duration of drying prior to storage (p < 0.001) and storage method (p = 0.015). Germination loss in storage was rapid at high moisture content and slow at low moisture content. Between 60 and 80% of seeds germinated after six months storage at 12.8% moisture content. The viability equation predicted accurately germination of farmer-saved seed stored under ambient temperature in Ghana. Except for the japonica rice cultivar WAB 126-18-HB, the traditional cultivars Kawomo, Viono and Wuwulili survived better in storage than improved cultivars. There is a need to improve seed quality of improved cultivars if farmers are to benefit from their higher yields and grain quality and to improve storage practices.

scholarly journals Moisture level and storage container effects on seed quality of soybean genotypes under ambient condition

2020 ◽  
Vol 44 (4) ◽  
pp. 631-640
Author(s):  
MR Ali ◽  
MM Rahman ◽  
M Asaduzzaman ◽  
MAH Khan ◽  
J Rahman
Keyword(s):  
Moisture Content ◽  
Seed Quality ◽  
Agricultural Research ◽  
Seed Moisture Content ◽  
Seed Moisture ◽  
Vigour Index ◽  
Soybean Genotypes ◽  
Initial Seed ◽  
And Storage

The experiment was conducted at the Seed Laboratory, Regional Agricultural Research Station, Bangladesh Agricultural Research Institute, Jamalpur in 2013 to study the effect of seed moisture content and storage containers on seed quality of soybean genotypes. Three genotypes of soybean (AGS 191, ASET 93 and Shohag), four initial seed moisture content (6, 8, 10 and 12%) and two types of storage containers (polythene bag and glass jar) were included in the experimental treatment. Seeds of soybean genotypes was stored at ambient condition were temperature ranged from 15.97 to 29.37 0C, relative humidity ranged from 75.21 to 86.23% and rainfall ranged from 0.00 to 425mm during the whole storage period. Seed moisture content (%), germination (%) and vigour index were recorded at 50, 100, 150 and 200 days after storage (DAS). Result showed that final seed moisture content increased with the increase of initial seed moisture content. Genotype AGS 191 showed the highest germination (%) and vigour index. Seeds stored in polythene bag or glass jar showed similar performance for germination (%) and vigour index. Highest seed moisture content significantly reduced the germination and vigour index errespective of containers. The results indicate that soybean seed can be stored safely for at least 200 days maintaining >80% germination and high vigour when stored in polythene bag or glass jar with 6-8% initial moisture content at ambient room temperature and relative humidity. Bangladesh J. Agril. Res. 44(4): 631-640, December 2019

scholarly journals FACTORS AFFECTING THE VIABILITY AND GERMINATION BEHAVIOR OF CONIFEROUS SEED. VI. STRATIFICATION AND SUBSEQUENT TREATMENT, PSEUDOTSUGA MENZIESII (MIRB.) FRANCO

1962 ◽  
Vol 38 (4) ◽  
pp. 485-496 ◽  
Author(s):  
G. S. Allen
Keyword(s):  
Pseudotsuga Menziesii ◽  
Subsequent Treatment ◽  
Duration Of Treatment ◽  
Factors Affecting ◽  
Seed Testing ◽  
Stratification Effect ◽  
Incubation Temperatures ◽  
And Storage ◽  
Post Stratification

Stratification effects increase with duration of treatment; short treatments accelerate germinaion markedly for incubation at 25 °C but longer treatments are necessary for rapid germination at 15° or 10 °C. Post stratification drying and storage reduce the stratification effect, particularly at low incubation temperatures, but do not adversely affect germinative capacity. Implications for seed testing and nursery practice are discussed.

Drying and storage of prechilled Douglas fir, Pseudotsuga menziesii, seeds

1999 ◽  
Vol 29 (2) ◽  
pp. 172-177 ◽  
Author(s):  
C Muller ◽  
E Falleri ◽  
E Laroppe ◽  
M Bonnet-Masimbert
Keyword(s):  
Moisture Content ◽  
Pseudotsuga Menziesii ◽  
Traditional Method ◽  
Detrimental Effect ◽  
Seedling Emergence ◽  
Douglas Fir ◽  
Dormancy Release ◽  
Optimal Temperature ◽  
Germination Speed ◽  
And Storage

Douglas fir, Pseudotsuga menziesii (Mirb.) Franco, seeds exhibit relative dormancy as they do not germinate at suboptimal temperature (15°C), whereas at optimal temperature (20°C) some germination occurred. Thus, germination at 15°C was chosen to estimate dormancy release. In the first experiment, seeds were prechilled at 32% moisture content (MC) for 0-34 weeks at 3°C. Long chilling treatments enhanced germinability and, more markedly, germination speed both at 20°C and at 15°C. Seeds pretreated for the longest periods were then dried to 6.7% MC and stored up to 6 months without any detrimental effect on germination at 15°C. In the second experiment, seeds from a second seedlot were prechilled for 18 weeks and then stored at three different MCs over a period of 17 months. Seeds stored at the lowest MC (6.7%) germinated fastest and to the highest percentage both at 15 and 20°C. In the nursery, seedling emergence tests confirmed results from this experiment. In most cases, comparisons between seeds prechilled at controlled MC before storage and those stratified with the traditional method resulted in better performance of the first ones, both in the laboratory and in the nursery.

scholarly journals Effect of Desiccation and Storage Environment on Longevity of Ehretia Cymosa Thonn. Seeds.

2020 ◽  
Author(s):  
Peter Murithi Angaine ◽  
Stephen Muriithi Ndungú ◽  
Alice Adongo Onyango ◽  
Jesse Omondi Owino
Keyword(s):  
Moisture Content ◽  
Storage Temperature ◽  
Seed Viability ◽  
Seed Storage ◽  
Storage Duration ◽  
Seed Moisture Content ◽  
Seed Moisture ◽  
Storage Behavior ◽  
Storage Studies ◽  
And Storage

Abstract Background: Globally, forestry faces challenges in the availability of seeds due to limited knowledge on seed handling of various species. Forestry seeds are constantly being reviewed and classified as either recalcitrant, intermediate, or orthodox based on their storage behavior. It is essential to understand the tree seed storage behavior to maintain seed viability and thus minimize seed losses. There is scanty literature combining factors of seed moisture content (6%, 9%, 12%, 15%, and 20%), seed storage temperature (20oC, 5oC and -20oC), seed storage duration (1, 4, 9 and 12 months), and germination in different sites with varying environmental variables. Ehretia cymosa is important in the Afromontane forestry landscape as a medicinal, rehabilitation, and conservation species. This study conducted desiccation and storage studies and their influence on the viability of E. cymosa seeds. The study sought to determine the optimum conditions for the storage of Ehretia cymosa that maintains viability. Results: This study observed that E. cymosa dried to seed moisture content of 6%, stored for 12 months at 20oC and sown in the laboratory had the highest germination performance (27.6 ± 3.18%) (p<0.05). Conclusion: This confirms that E.cymosa seeds exhibit orthodox storage behavior. The authors recommend longer storage studies (>12months) to determine the actual longevity of the seeds of this species. The significance of these results would be useful for foresters and farmers that would need to use this species for various purposes.

scholarly journals Effect of Storage Temperature and Seed Moisture on Germination of Stored Flowering Dogwood Seed

2005 ◽  
Vol 23 (1) ◽  
pp. 29-32
Author(s):  
Sandra M. Reed
Keyword(s):  
Moisture Content ◽  
Storage Temperature ◽  
Dry Weight ◽  
Seed Moisture Content ◽  
Flowering Dogwood ◽  
Seed Supply ◽  
Seed Moisture ◽  
Percent Germination ◽  
And Storage

Abstract Dogwood producers occasionally face a shortage of flowering dogwood seed. Storing excess seed during years when seed are abundant would allow growers to stabilize their seed supply. This study was conducted to evaluate the effects of seed moisture and storage temperature on the viability of stored flowering dogwood seed. Seed were collected in Fall 1999 and 2000, dried to 6, 10 and 14% moisture content, and stored at 22, 5 and −20C (72, 41 and −4F) for 1, 2 and 3 years. Following storage, seed were cold stratified and sown in a greenhouse. Percent germination and seedling dry weight were recorded. Seed stored at 22C (72F) quickly lost viability. At 5C (41F), seed moisture content was critical, with seed dried to 14% moisture content germinating poorly after 2 years and failing to germinate after 3 years in storage. In general, storage at −20C (−4F) was superior to storage at 5C (41F). Seed moisture content was not as critical at −20C (−4F) as it was at 5C (41F), but may become more important if length of storage is extended past 3 years. Based on the results of this study, it is recommended that seed be dried to 6 to 10% moisture prior to storage, stored in air-tight containers, and stored in a −20C (−4F) freezer.

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