Effects of Seed Weight and Seed Type on Early Seedling Growth of Pinus sylvestris under Harsh and Optimal Conditions

Wennström, Ulfstand; Bergsten, Urban; Nilsson, Jan‐Erik

doi:10.1080/028275802753626764

Cited by 20 publications

(18 citation statements)

References 18 publications

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“…Formation of a top buds, their number and size may be indication of vigour of seedlings and their growth conditions (Gavrikov and Sekretenko 1996;Khan et al 1996;Wennström et al 2002). In our study, formation of a top bud on the seedlings which were harvested in September, may indirectly point to more favourable conditions for seed germination and seedling growth.…”

Section: Discussionmentioning

confidence: 81%

Effects of different methods of site preparation on natural regeneration of Pinus sylvestris in Eastern Poland

Aleksandrowicz-Trzcińska¹,

Drozdowski²,

Brzeziecki³

et al. 2013

Dendrobiology

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Mechanical site preparation (MSP) is commonly used to enable forest regeneration of clear-cuts. Less intense methods may be more suitable from an environmental point of view, but such a method can result in the lack of natural regeneration. We compare the influence of three MSP methods on natural regeneration of Scots pine. The methods differ in their degree of soil disturbance. The effects of MSP by forest plough (FP), active plough (AP), and forest cutter (FC) on density, quality, and biometric parameters of one-year old seedlings were determined. The highest density of seedlings was obtained in the FP treatment (188,000 seedlings ha ). The best quality seedlings were found in the FC variant, and the worst -in the FP treatment. Most biometric parameters of seedlings did not differ by MSP method, except for the root length and root:shoot ratio. By the end of growing season, in the FP treatment, 1-year old seedlings formed a top bud more than twice as often as the seedlings from the AP and FC treatments. The FP method led to the best Scots pine natural regeneration. The results obtained in the FC variant were not as good as in the FP method, though they were still acceptable from the silvicultural point of view. The FC method was the least intensive method of site preparation, yet it is considered the most appropriate from the environmental (soil protection) point of view.

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Section: Discussionmentioning

confidence: 81%

Effects of different methods of site preparation on natural regeneration of Pinus sylvestris in Eastern Poland

Aleksandrowicz-Trzcińska¹,

Drozdowski²,

Brzeziecki³

et al. 2013

Dendrobiology

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“…It has been suggested that seed mass effects may be more pronounced under limited resources than under optimal conditions (Seiwa and Kikuzawa, 1996;Wennström et al, 2002). Wildfire eliminates pre-existent vegetation, temporally reducing competition for light, water and nutrients (Arianoutsou, 1998).…”

Section: Introductionmentioning

confidence: 99%

Seed mass effects on performance of Pinus halepensis Mill. seedlings sown after fire

Bladé

Vallejo

2008

Forest Ecology and Management

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“…This shows that heritabilities of juvenile growth traits are most likely to fluctuate drastically even in stable growing environments such greenhouses and growth chambers. Family variation in seed size may influence variation in juvenile height (WENNSTROM et al, 2002). This would cause heritability for growth traits to decline as the influence of seed size on height growth declines.…”

Section: Variation For Seedling Growth Traitsmentioning

confidence: 99%

Genetic Parameters for Bud Flushing and Growth Characteristics of White Spruce Seedlings

2010

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We estimated heritabilities and correlations for bud flushing and growth traits of white spruce seedlings, and the correlations of seedling traits with 10-and 11-year height of the same families in the field. The seedling greenhouse experiment had a randomized complete block design with 30 replications, 58 open-pollinated families and single-tree plots. Individual tree heritability (h i 2 ) was 0.78 and 0.54 for 18 (H18) and 36 (H36)-week total height, respectively. The corresponding heritabilities for family means (h f 2 ) were 0.91 and 0.82. For root collar diameter, h i 2 were respectively, 0.61 and 0.22 at 24 and 54 weeks from germination. The corresponding h f 2 were 0.87 and 0.55. Heritability for bud flushing ranged from 0.13 to 0.46 (h i 2 ) and 0.44 to 0.83 (h f 2 ). The genetic correlation (r a ) between H18 and H36 was 0.70 and that of D24 and D54 was 0.89, indicating a substantial change in family ranking in one growing season. The type B genetic correlation for H18 with field heights ranged from 0.22 to 0.30. Type B genetic correlations of field height with all other seedling traits were very low and largely negative. It can be concluded that: (1) age-age correlation of seedling height can be expected to decline drastically even in a stable environment of the greenhouse, (2) heritability for growth potential is meaningful when estimated on cumulative growth not on individual annual growth increments that are susceptible to short-term environmental variation, (3) dates of bud flushing did not influence variation in height and root collar diameter, and (4) field growth potential is better predicted by greenhouse growth potential than other morphological and shoot phenological traits.

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Effects of Seed Weight and Seed Type on Early Seedling Growth of Pinus sylvestris under Harsh and Optimal Conditions

Cited by 20 publications

References 18 publications

Effects of different methods of site preparation on natural regeneration of Pinus sylvestris in Eastern Poland

Effects of different methods of site preparation on natural regeneration of Pinus sylvestris in Eastern Poland

Seed mass effects on performance of Pinus halepensis Mill. seedlings sown after fire

Genetic Parameters for Bud Flushing and Growth Characteristics of White Spruce Seedlings

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