scholarly journals Identifying the root collar on forest tree seedlings

1995 ◽  
Vol 71 (3) ◽  
pp. 304-310 ◽  
Author(s):  
Peter A. Menes ◽  
Gina H. Mohammed
Keyword(s):  
Key Words ◽  
Surface Soil ◽  
Forest Tree ◽  
Tree Seedlings ◽  
Practical Guidelines ◽  
Ground Line Diameter ◽  
Arc Root ◽  
Soil Level ◽  
Root Collar ◽  
Ground Line

This paper offers practical guidelines on how to identify the root collar of species commonly grown in Ontario forest tree nurseries. These guidelines would also be applicable to naturally-regenerated seedlings. Difficulties associated with locating the root collar on transplanted stock are also addressed. Colour differences on the stem are not reliable for locating the root collar; stem colouration can vary according to surface soil level and planting depth. The paper distinguishes among three parameters: apparent root collar (ARC), root collar, and ground-line diameter. Key words: caliper, cotyledon, hypocotyl

Development of Efficient Production Systems for Forest Tree Seedlings

2019 ◽  
Vol 73 (2) ◽  
pp. 120-122
Author(s):  
Naoki Negishi ◽  
Katsuhiko Nakahama ◽  
Nobuyuki Urata ◽  
Toshiaki Tanabe
Keyword(s):  
Production Systems ◽  
Forest Tree ◽  
Efficient Production ◽  
Tree Seedlings

scholarly journals Fire suppression and seed dispersal play critical roles in the establishment of tropical forest tree species in southeastern Africa

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Tomohiro Fujita
Keyword(s):  
Seed Dispersal ◽  
Tree Species ◽  
Seedling Survival ◽  
Fire Suppression ◽  
Forest Tree ◽  
Tree Seedlings ◽  
Seedling Mortality ◽  
Forest Tree Species ◽  
Seed Deposition ◽  
Syzygium Guineense

AbstractThis study examined the mechanisms of facilitation and importance of seed dispersal during establishment of forest tree species in an Afrotropical woodland. Seedling survival of Syzygium guineense ssp. afromontanum was monitored for 2.5 years at four different microsites in savannah woodland in Malawi (southeastern Africa) under Ficus natalensis (a potential nurse plant), Brachystegia floribunda (a woodland tree), Uapaca kirkiana (a woodland tree), and at a treeless site. The number of naturally established forest tree seedlings in the woodland was also counted. Additionally, S. guineense ssp. afromontanum seed deposition was monitored at the four microsites. Insect damage (9% of the total cause of mortality) and trampling by ungulates (1%) had limited impact on seedling survival in this area. Fire (43%) was found to be the most important cause of seedling mortality and fire induced mortality was especially high under U. kirkiana (74%) and at treeless site (51%). The rate was comparatively low under F. natalensis (4%) and B. floribunda (23%), where fire is thought to be inhibited due to the lack of light-demanding C4 grasses. Consequently, seedling survival under F. natalensis and B. floribunda was higher compared with the other two microsites. The seedling survival rate was similar under F. natalensis (57%) and B. floribunda (59%). However, only a few S. guineense ssp. afromontanum seedlings naturally established under B. floribunda (25/285) whereas many seedlings established under F. natalensis (146/285). These findings indicate that the facilitative mechanism of fire suppression is not the only factor affecting establishment. The seed deposition investigation revealed that most of the seeds (85%) were deposited under F. natalensis. As such, these findings suggest that in addition to fire suppression, dispersal limitations also play a role in forest-savannah dynamics in this region, especially at the community level.

Some diseases of forest tree seedlings in India caused by Sclerotium rolfsii and Rhizoctonia solani

1985 ◽  
Vol 15 (3) ◽  
pp. 187-190 ◽  
Author(s):  
E. J. Maria Florence ◽  
J. K. Sharma ◽  
K. V. Sankaran ◽  
C. Mohanan
Keyword(s):  
Rhizoctonia Solani ◽  
Sclerotium Rolfsii ◽  
Forest Tree ◽  
Tree Seedlings

Preliminary analysis of functional traits in cloud forest tree seedlings

Trees ◽  
2017 ◽  
Vol 31 (4) ◽  
pp. 1253-1262 ◽  
Author(s):  
Tarin Toledo-Aceves ◽  
Fabiola López-Barrera ◽  
Víctor Vásquez-Reyes
Keyword(s):  
Functional Traits ◽  
Preliminary Analysis ◽  
Cloud Forest ◽  
Forest Tree ◽  
Tree Seedlings
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