Field performance potential of interior spruce seedlings: effects of stress treatments and prediction by root growth potential and needle conductance

Simpson, David G.; Thompson, C. F.; Sutherland, Craig D.

doi:10.1139/x94-076

Cited by 21 publications

(5 citation statements)

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“…Despite the rapid movement of water from the root ball into the soil, the effect of the original water content of root balls on mortality was evident, since the mortality after the 4-week postplanting drought period was on average 31%-units higher in dry seedlings (8-day drying treatment) than in seedlings watered just before planting (0-day drying treatment). The high water content of root balls also promoted root egress, which has been reported to correlate with seedling eld performance (Sutton 1987, Simpson et al 1994.…”

Section: Discussionmentioning

confidence: 87%

Effect of Drought on Growth and Mortality of Actively Growing Norway Spruce Container Seedlings Planted in Summer

Helenius

Luoranen

Rikala

et al. 2002

Scandinavian Journal of Forest Research

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Effect of drought on growth and mortality of actively growing Norway spruce container seedlings planted in summer.Survival, root egress and height growth of 13-month-old actively growing Norway spruce (Picea abies (L.) Karst.) container seedlings exposed to preplanting drying treatments (0, 4, and 8 days) and postplanting drought periods (1, 2, 3, and 4 weeks) were studied in the eld between 5 July and 18 August 1999. The mortality of seedlings increased and the height growth and root egress decreased throughout the postplanting drought period. Postplanting performance was also affected by preplanting drying treatments. The results indicate that no risk of excessive mortality and growth restrictions occurs when actively growing seedlings are planted in summer, provided that seedlings are well watered before planting and the drought period does not exceed 3 weeks.

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Section: Discussionmentioning

confidence: 87%

Effect of Drought on Growth and Mortality of Actively Growing Norway Spruce Container Seedlings Planted in Summer

Helenius

Luoranen

Rikala

et al. 2002

Scandinavian Journal of Forest Research

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“…If shoots break, growth after planting may be reduced and seedlings may become bushy or curvy. However, the mechanical stress, if not too heavy, has not been shown to affect the survival and growth of growing conifer container seedlings negatively (Simpson et al 1994, Stjernberg 1997, Helenius et al 2002.…”

Section: Discussionmentioning

confidence: 99%

Extending the planting period of dormant and growing Norway spruce container seedlings to early summer

Luoranen¹,

Rikala²,

Konttinen³

et al. 2005

Silva Fenn.

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In order to make mechanized planting economically viable, the present spring planting period for Norway spruce (Picea abies (L.) Karst.) seedlings in Scandinavia needs to be extended. To evaluate the possibilities to extend the planting period, six field experiments were established in four years during which frozen-stored, dormant seedlings and actively growing seedlings targeted for spring planting were planted regularly from mid-May to mid-July or the end of August. The survival of actively growing seedlings did not differ between planting dates from mid-May to mid-July. For dormant seedlings, however, the later in summer they were planted the lower was the survival. Oversized seedlings grown in the nursery in containers of too small volume, which were usually planted after mid-June, resulted in reduced growth of seedlings after planting. Root egress (growth of roots from root plugs into the surrounding soil) was most rapid in July and early August and slowest in May and September. Results showed that with dormant seedlings the planting period can be extended from May to mid-June without increasing mortality or reducing growth. The planting period for seedlings stored outdoors and those seedlings that were already growing in June for the purpose of spring plantings can be extended even longer, but it must be kept in mind that the risk of mechanical damage and reduced growth increase due to brittleness of the shoot and increased height. Further research is needed to evaluate the risks in practical scale plantings and with seedlings that are specially targeted for planting after mid-June.

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“…Among these factors, damage to cellular membranes or increase in membrane permeability caused by desiccation (Fig. 10 Correlation between CO 2 assimilation rate (A), index of root growth (B) and the F v /F o ratio (C), and the postplanting mortality (%) in radiata pine seedlings stored for 1-15 days in different root and temperature conditions exchange by stored seedlings could be expected owing to damage and reduced water uptake which in turn provoked decreased water potential of shoots sufficient to cause stomatal closure (Simpson et al 1994). Moreover, the decline of gas Fig.…”

Section: Gas Exchange Parametersmentioning

confidence: 99%

Gas exchange and chlorophyll fluorescence responses of Pinus radiata D. Don seedlings during and after several storage regimes and their effects on post-planting survival

Mena‐Petite

Robredo

Alcalde

et al. 2003

Trees

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Post-storage gas exchange parameters like CO 2 assimilation, stomatal conductance, transpiration, water use efficiency and intercellular CO 2 concentrations, together with several chlorophyll a fluorescence parameterswere examined in radiata pine (Pinus radiata D. Don) seedlings that were stored for 1, 8 or 15 days at 4°or 10°C with or without soil around the roots. Results were analysed in relation to post-storage water potential and electrolyte leakage in order to forecast their vitality (root growth potential) following cold storage, and post-planting survival potential under optimal conditions. During storage at 4°and 10°C, photosynthesis was reduced, being more pronounced in bare-root seedlings than in seedlings with soil around the roots. The depletion of CO 2 assimilation seemed not to be solely a stomatal effect as effects on chloroplasts contributed to this photosynthetic inhibition. Thus, the fall in the ratios F v /F m , F v /F o and F m /F o indicated photochemical apparatus damage during storage. Photosynthetic rate was positively correlated with the root growth index and new root length showing that new root growth is dependent primarily on current photosynthesis. Pre-planting exposure of bare-root radiata pine seedlings to temperatures of 10°C for more than 24 h during transportation or storage is not recommended.

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Field performance potential of interior spruce seedlings: effects of stress treatments and prediction by root growth potential and needle conductance

Cited by 21 publications

References 0 publications

Effect of Drought on Growth and Mortality of Actively Growing Norway Spruce Container Seedlings Planted in Summer

Effect of Drought on Growth and Mortality of Actively Growing Norway Spruce Container Seedlings Planted in Summer

Extending the planting period of dormant and growing Norway spruce container seedlings to early summer

Gas exchange and chlorophyll fluorescence responses of Pinus radiata D. Don seedlings during and after several storage regimes and their effects on post-planting survival

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