scholarly journals Seedling establishment in eelgrass: seed burial effects on winter losses of developing seedlings

2012 ◽  
Vol 448 ◽  
pp. 197-207 ◽  
Author(s):  
SR Marion ◽  
RJ Orth
Keyword(s):  
Seedling Establishment ◽  
Seed Burial ◽  
Winter Losses

scholarly journals Seed biology of brome grass weeds (Bromus diandrus and B hordeaceus) and effects of land management

2010 ◽  
Vol 63 ◽  
pp. 78-83
Author(s):  
F. Dastgheib ◽  
N. Poole
Keyword(s):  
Land Management ◽  
Seedling Establishment ◽  
Management Practices ◽  
Detrimental Effect ◽  
Soil Surface ◽  
Seed Burial ◽  
Bromus Diandrus ◽  
Seed Biology ◽  
Brome Grass ◽  
Brome Grasses

Aspects of seed biology of ripgut brome (Bromus diandrus) and soft brome (B hordeaceus) were studied in relation to land management practices Among the practices tested burning stubble had a detrimental effect on seed survival The majority of seeds close to the soil surface were charred or nonviable following a stubble fire Overall higher brome infestation was measured in notillage compared to minimum tillage or burning treatments More than 80 of the seeds of both species emerged in the field within the first couple of months after planting and full germination was achieved by spring Seed burial at depths from 1 to 20 cm did not significantly affect germination but seedling establishment and vigour was reduced with seed depth Implications of these results in management of brome grasses are discussed

scholarly journals Fatal germination in barnyardgrass (Echinochloa crus-galli)

2013 ◽  
Vol 49 (No. 4) ◽  
pp. 193-197 ◽  
Author(s):  
Z. Martinková ◽  
A. Honěk
Keyword(s):  
Seed Bank ◽  
Seedling Establishment ◽  
Burial Depth ◽  
Spring Season ◽  
Seed Burial ◽  
Pre Treatment ◽  
Germinated Seeds

Seeds of weeds buried by tillage may germinate at depths from which seedlings cannot establish. In barnyardgrass (Echinochloa crus-galli) we investigated how fatal germination was influenced by the depth and time of seed burial. The proportion of germinated seeds decreased with burial depth to 0–20% at ≥ 0.1 m depth which is fatal for seedling establishment. The percentage of fatal germination was greater for the seeds buried during the spring season than during autumn. Germination was influenced by seed pre-treatment, after ripening or stratification. Spring ploughing of non-dormant seeds below 0.1 m depth induces fatal germination, decreasing in this way seed bank of barnyardgrass.

Effects of irrigation on seedling emergence and seedling survival of a desert shrub Haloxylon ammodendron (Chenopodiaceae)

2005 ◽  
Vol 53 (6) ◽  
pp. 529 ◽  
Author(s):  
Kazuo Tobe ◽  
Xiaoming Li ◽  
Kenji Omasa
Keyword(s):  
Seedling Establishment ◽  
Seedling Survival ◽  
Sand Dunes ◽  
Seedling Emergence ◽  
Coarse Sand ◽  
Early Spring ◽  
Burial Depth ◽  
Haloxylon Ammodendron ◽  
Seed Burial ◽  
Desert Sand

Haloxylon ammodendron (C.A. Mey) Bunge (Chenopodiaceae) is a shrub occurring on desert sand dunes in China. Seedling emergence and seedling survival were investigated by sowing seeds at different depths (0, 2.5, 5.0 or 10 mm) in fine or coarse sand in pots irrigated under different regimes. Seed burial in sand was required for seedling establishment of this species. Seedling emergence depended greatly on seed burial depth, sand type, and irrigation regime; this appeared to be due to (1) seeds or seedlings suffering from oxygen or moisture deficiency depending on the air : moisture ratio in sand, and/or (2) higher moisture content in sand resulting in hardening of the sand and obstruction of seedling growth. Increased irrigation resulted in longer survival of emerging seedlings because sand was moistened more deeply, and moisture in deeper sand persisted longer. The results suggest that the infrequent and light precipitation common in desert environments is likely to cause germination of many of the buried seeds, but is insufficient for emerging seedlings to survive. It is suggested that water from melting snow in early spring is crucial in enabling seedling establishment of this species in the deserts of China.

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