scholarly journals Effects of Seed Coating with Differently Oxidized Iron on Seedling Emergence and Establishment after Direct-seeding under Submerged Conditions

2009 ◽  
Vol 78 (2) ◽  
pp. 242-249 ◽  
Author(s):  
Masami Furuhata ◽  
Tadashi Chosa ◽  
Osamu Matsumura ◽  
Tomoyuki Yukawa
Keyword(s):  
Seedling Emergence ◽  
Direct Seeding ◽  
Seed Coating ◽  
Oxidized Iron ◽  
Submerged Conditions

Direct seeding of PinusSylvestris using microsite preparation and invigorated seed lots of different quality: 2-year results

1994 ◽  
Vol 24 (1) ◽  
pp. 77-86 ◽  
Author(s):  
Hans Winsa ◽  
Urban Bergsten
Keyword(s):  
Seed Quality ◽  
Seedling Survival ◽  
Seedling Emergence ◽  
Mineral Soil ◽  
Direct Seeding ◽  
Growing Seasons ◽  
Humus Layer ◽  
Negative Effect ◽  
Mean Germination Time ◽  
Better Than

Direct seeding of Pinussylvestris L. is a regeneration method, with potential for development considering scarification, microsite preparation, seed invigoration, and seed quality. Three seed lots of different quality concerning seed weight, germination percent, and mean germination time were used on two sites in northern Sweden. Microsite preparation, 2 cm deep pyramidal indentations, of the mineral soil improved seedling emergence on the two sites by 48 and 62%, respectively, compared with seeding without preparation other than removal of the humus layer. Microsite preparation in combination with invigorated seed, i.e., seed incubated at 30% moisture content for 7 days at 15 °C, resulted in seedling emergence of about 85% for the highest and about 50% for the lowest seed quality at both sites. Noninvigorated seed, seeded without microsite preparation, reached about 55% for the highest and 22% at one and 43% at the other for the lowest seed quality. Without microsite preparation there was no, or a negative, effect of seed invigoration on seedling emergence. Seedling survival after the first winter improved significantly with better seed quality. Survival averaged 92 and 72% at the two sites, with frost heaving causing most mortality. Seedlings from invigorated and redried seed survived better than seedlings from untreated seed. Seedlings from the best seed quality had higher values in seedling height, about 35%, shoot length, about 60%, and needle length, about 30%, after two growing seasons than seedlings from lower seed qualities. Invigoration and microsite preparation had no effect on measured growth characteristics.

scholarly journals Impacts of bracteole removal and seeding rate on seedling emergence of halophyte shrubs: implications for rangeland rehabilitation in arid environments

2019 ◽  
Vol 41 (1) ◽  
pp. 33
Author(s):  
Mounir Louhaichi ◽  
Sawsan Hassan ◽  
Ali Mekki Missaoui ◽  
Serkan Ates ◽  
Steven L. Petersen ◽  
...  
Keyword(s):  
Seed Treatment ◽  
Nutritive Value ◽  
Block Design ◽  
Seedling Emergence ◽  
Direct Seeding ◽  
Arid Environments ◽  
Seeding Rate ◽  
Seed Processing ◽  
Processing Techniques ◽  
Positive Effect

Direct seeding techniques often result in unsatisfactory outcomes in rangeland rehabilitation, primarily because of low seedling emergence and poor establishment. Seed processing techniques aimed at improving seedling emergence have gained interest by pasture managers. The purpose of this study was to investigate the combined effects of bracteole removal and seeding rate on seedling emergence in seven halophytic species: Atriplex halimus, A. canescens, A. leucoclada, A. nummularia, A. lentiformis, Salsola vermiculata and Haloxylon aphyllum under semi-arid conditions in Tel Hadya (Syria). Each of these species was evaluated for seedling emergence under two seed treatments (bracteoles removed and non-removed bracteoles) with three seeding rates (10, 30 and 60 seeds per pot), in a completely randomised block design. The results showed a positive effect of seed treatment on seedling emergence for all studied species. The native A. halimus had the highest emergence percentages whereas the introduced A. mummularia, had the lowest. However, there were no significant effects of seeding rates on seedling emergence. These results showed that bracteole removal could improve germination and seedling emergence, and potentially increase the rate of establishment of the species studied. Therefore, when implementing rangeland rehabilitation projects, bracteole removal needs to be considered. The native S. vermiculata should be recommended for direct seeding in the West Asia and North Africa region given its high seedling emergence, known high palatability, nutritive value, and high auto-regeneration performance.

SUITABILITY OF CAPSULE AS A PADDY COATING MATERIAL FOR THE SYSTEM OF RICE INTENSIFICATION (SRI)

2016 ◽  
Vol 78 (1-2) ◽  
Author(s):  
Tukur Daiyabu Abdulkadir ◽  
Wan Ishak Wan Ismail ◽  
Muhammad Saufi Mohd Kasim ◽  
Siti Khairunniza Bejo
Keyword(s):  
Labor Demand ◽  
Coating Material ◽  
Direct Seeding ◽  
The Other ◽  
System Of Rice Intensification ◽  
Gelatin Capsule ◽  
Seed Coating ◽  
Gelatin Capsules ◽  
Different Temperatures ◽  
Rice Intensification

One of the challenges faced by farmers in adopting the system of rice intensification is the seed establishment required high labor demand. This research aims at providing an alternative to seedling transplanting for the system of rice intensification. In this research the paddy seed was enhanced with the use of pharmaceutical capsule as a seed coating material for ease of seed singulation and suitability in handling by a conventional direct seeding technique. It covers the study of capsules as a suitable paddy seed coating material. The solubility of starch and gelatin capsules in water was studied at three different temperatures of 25oC, 35oC, and 45oC. Three paddy seed treatments of dry seeds, primed seed, and pre germinated were each placed in to the capsule at the ratio of 1:1 and planted in the soil with three replications. The planted seeds were irrigated two times daily for a period of 10 days within which the germination and emergence were recorded on daily bases. Gelatin capsule was found to be soluble in water at temperature of 45oC and above. Starch capsule on the other hand was found to be soluble at temperatures of 25oC which made it the more suitable paddy coating material in comparison with the gelatin capsule. The germination and emergence results of starch capsule coated paddy were found to be 95%, 83%, and 58% for the pre germinated, primed, and dry paddy seeds respectively.

scholarly journals Seed encrusting with salicylic acid: A novel approach to improve establishment of grass species in ecological restoration

PLoS ONE ◽  
2021 ◽  
Vol 16 (6) ◽  
pp. e0242035
Author(s):  
Simone Pedrini ◽  
Jason C. Stevens ◽  
Kingsley W. Dixon
Keyword(s):  
Salicylic Acid ◽  
Seed Germination ◽  
Ecological Restoration ◽  
Seedling Survival ◽  
Seedling Emergence ◽  
Field Conditions ◽  
Grass Species ◽  
Seed Coating ◽  
Seedling Density ◽  
Survival And Growth

To achieve global ambitions in large scale ecological restoration, there is a need for approaches that improve the efficiency of seed-based interventions, particularly in overcoming the bottleneck in the transition from germination to seedling establishment. In this study, we tested a novel seed-based application of the plant stress modulator compound salicylic acid as a means to reduce seedling losses in the seed-to-seedling phase. Seed coating technology (encrusting) was developed as a precursor for optimising field sowing for three grass species commonly used in restoration programs, Austrostipa scabra, Microlaena stipoides, and Rytidosperma geniculatum. Salicylic acid (SA, 0.1mM) was delivered to seeds via imbibition and seed encrusting. The effects of SA on seed germination were examined under controlled water-limited conditions (drought resilience) in laboratory setting and on seed germination, seedling emergence, seedling growth and plant survival in field conditions. Salicylic acid did not impact germination under water stress in controlled laboratory conditions and did not affect seedling emergence in the field. However, seedling survival and growth were improved in plants grown from SA treated seeds (imbibed and encrusted) under field conditions. When SA delivery methods of imbibing and coating were compared, there was no significant difference in survival and growth, showing that seed coating has potential to deliver SA. Effect of intraspecific competition as a result of seedling density was also considered. Seedling survival over the dry summer season was more than double at low seedling density (40 plants/m2) compared to high seedling density (380 plants/m2). Overall, adjustment of seeding rate according to expected emergence combined with the use of salicylic acid via coating could improve seed use efficiency in seed-based restoration.

Three seedling emergence methods in soil seed bank studies: implications for interpretation of propagule deposition in riparian zones

2007 ◽  
Vol 17 (3) ◽  
pp. 183-199 ◽  
Author(s):  
Angela Gurnell ◽  
Joanne Goodson ◽  
Ken Thompson ◽  
Owen Mountford ◽  
Nick Clifford
Keyword(s):  
Soil Seed Bank ◽  
Seedling Emergence ◽  
Species Abundance ◽  
Detrended Correspondence Analysis ◽  
Riparian Zones ◽  
Data Sets ◽  
Propagule Bank ◽  
River Bed ◽  
Species Abundance Data ◽  
Submerged Conditions

AbstractSamples of soil and recently deposited sediments were collected from the river bed, bank face and bank tops of two lengths (reaches) of the River Frome, Dorset, UK and one reach of the River Tern, Shropshire, UK. Soil propagule bank samples were collected in May 2003, and depositional samples were collected subsequently over four consecutive 4-month periods between June 2003 and October 2004. The samples were subjected to three emergence trials under drained, waterlogged and submerged conditions. Significantly more seedlings germinated in the drained than waterlogged trial, and waterlogged than submerged trials. Drained, waterlogged and submerged trials identified 186, 76 and 37 species, respectively. Six species identified in the waterlogged trials were not identified in the drained trials, and five species in the submerged trials were not found in the drained trials. Submerged trials added two species to the drained and waterlogged results. Application of detrended correspondence analysis (DCA) to average species abundance data, for the sampled hydrological habitats (bed, bank face, bank top) within the soil propagule bank and four depositional data sets, generated different results for the three trials. The drained treatment revealed significant differences between sites, seasons and hydrological habitats, whereas the waterlogged and submerged treatments presented an increasingly homogeneous view of the samples. Our results confirm other propagule bank emergence comparisons and extend them to depositional samples, demonstrating that the strong environmental sieves imposed by waterlogging and submergence restrict emergence of numerous terrestrial, wetland and even some aquatic species that were successfully identified using the drained conditions.

Seedling emergence and summer survival after direct seeding for woodland restoration on old fields in south-western Australia

2014 ◽  
Vol 15 (2) ◽  
pp. 140-146 ◽  
Author(s):  
Lauren M. Hallett ◽  
Rachel J. Standish ◽  
Justin Jonson ◽  
Richard J. Hobbs
Keyword(s):  
Western Australia ◽  
Seedling Emergence ◽  
Direct Seeding ◽  
Old Fields ◽  
Woodland Restoration
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