Short-day treatment enhances root egress of summer-planted<i>Picea abies</i>seedlings under dry conditions

Luoranen, Jaana; Helenius, Pekka; Huttunen, Liisa; Rikala, Risto

doi:10.1080/02827580701551382

Cited by 12 publications

(9 citation statements)

References 18 publications

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“…Such a treatment is contemplated by the protocol of forest tree nurseries of Quebec and currently used to induce growth cessation and bud set in seedlings, mainly for those planted in summer, which should be better enabled to withstand summer environmental conditions (Grossnickle 2000). Compared with seedlings grown under longday conditions, there is agreement that this treatment increases root growth and drought and frost tolerance of seedlings (Folk & Grossnickle 1997, Grossnickle & Folk 2003, Luoranen et al 2007). The short-day treatment is expected to promote photosynthesis, reduce respiration, and increase the proportion of carbon allocated to roots (Hawkins et al 1994).…”

Section: Other Effectsmentioning

confidence: 99%

“…The huge surface involved has extended the planting period during summer in all boreal regions (Tan et al 2008, Nilsson et al 2010. In these ecosystems, seedlings planted in late spring benefit from the fresh moist soil conditions due to still low temperatures and abundant water released with snowmelt (Luoranen et al 2007, Rossi et al 2011. However, in summer soils lose water at a higher rate than that supplied by precipitation, and soil water content has been observed to decrease down to 20% during the driest and hottest summer days even at the higher latitudes (Belien et al 2012).…”

Section: Introductionmentioning

confidence: 99%

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Size and age: intrinsic confounding factors affecting the responses to a water deficit in black spruce seedlings

Walsh¹,

Rossi²,

Lord³

2015

iForest

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Section: Other Effectsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Size and age: intrinsic confounding factors affecting the responses to a water deficit in black spruce seedlings

Walsh¹,

Rossi²,

Lord³

2015

iForest

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“…This method has not yet been tested or applied in northern Europe owing to the high energy costs. For plantings in late summer and early autumn, SD-treated seedlings are better since they are tolerant of drought and early autumn frosts after planting (Luoranen et al, 2006b(Luoranen et al, , 2007. In Norway, Norway spruce seedlings exposed to early summer SD treatments for summer plantings have also been examined (Kohmann & Sønsteby, 2007).…”

Section: Planting Datementioning

confidence: 99%

Reforestation with planting in northern Europe

Nilsson¹,

Luoranen²,

Kolström

et al. 2010

Scandinavian Journal of Forest Research

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112

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This paper reviews regeneration research during the past 20 years. The focus is mainly on planting of Norway spruce and Scots pine. Research on root morphology and nursery practices has played an important role in the introduction of containerized seedlings in northern Europe. In recent years, mini-seedlings have been tested. Conventionally, seedlings are planted in spring and early autumn but recent research indicates that Norway spruce seedlings can be planted from spring until the end of September. Soil temperature strongly influences seedling establishment in the harsh northern Scandinavian climate and a good way to increase soil temperature is to plant in elevated planting spots, which can be achieved by mounding. Soil scarification also reduces competition from field vegetation and damage by pine weevils. In southern Finland, Sweden and Norway, pine weevils are by far the most serious causes of damage to both Norway spruce and Scots pine. Therefore, designing regeneration treatments for decreasing pine weevil damage without using insecticides is one of the more important current research challenges. Examples of possible future trends in forest regeneration research are an emphasis on more basic research, use of fast growing tree species, multidisciplinary approaches and site-specific regeneration regimes.

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“…menziesii (Mirb.) Franco (Luoranen et al 2007, Jacobs et al 2008, Fløistad & Granhus 2010. In our study, when seedlings were further reared in the nursery after short-day treatment and re-exposed to natural night length, short-day treated seedlings had greater height growth increment (0.9 cm) relative to natural day (0.1 cm).…”

Section: Photoperiod Treatment and Fall Fertilization Effects On Heigmentioning

confidence: 82%

“…Nutrient status is a crucial determinant of seedling quality and is consequently monitored to evaluate nursery practices (Oliet et al 2013 and references therein). To the best of our knowledge, short-day studies have predominantly dealt with frost hardiness, seedling size, root growth potential, needle primordia, and sugar concentration (Grossnickle et al 1991, Luoranen et al 2006, 2007, Tan et al 2008, Luoranen & Rikala 2015. Therefore, simultaneously studying seedling nutrient status could help to improve our understand of how short-day treatment affects seedling quality.…”

Section: Introductionmentioning

confidence: 99%

Combined effects of short-day treatment and fall fertilization on growth, nutrient status, and spring bud break of Pinus tabulaeformis seedlings

Pan¹,

Jacobs²,

Li³

2017

iForest

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Although effects of short-day treatment and fall fertilization on seedling development have been studied independently, their combined influences are not well elucidated. We explored growth, nutrient concentration, and spring bud break of Chinese pine (Pinus tabulaeformis Carr.) seedlings exposed to two photoperiod treatments (short-day consisting of 3 weeks of 18-hr nights in late summer and ambient day length) and three rates of fall N fertilization (0, 12 and 24 mg N per seedling). Seedlings were assessed before fall fertilization and at the end of the growing season. Bud break timing was evaluated the following spring. Increased foliar P concentration concurrent with reduced root P and K concentration occurred in short-day treated seedlings at the conclusion of photoperiod treatment. By the end of the growing season, short-day treatment resulted in greater N and P concentration in the stems, and P concentration in the foliage. It also induced smaller foliage and stem dry mass in both stages. Fall fertilization consistently enhanced tissue N concentration, but interaction effects with short-day treatment were generally non-significant. Short-day treatment curtailed shoot growth, induced terminal bud set, and hastened spring bud break (by only one day) for this mid-latitude seed source (41° N). Thus, short-day treatment or fall fertilization each promoted an increased nutrient concentration, while having only a minor effect on spring bud break.

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Short-day treatment enhances root egress of summer-plantedPicea abiesseedlings under dry conditions

Cited by 12 publications

References 18 publications

Size and age: intrinsic confounding factors affecting the responses to a water deficit in black spruce seedlings

Size and age: intrinsic confounding factors affecting the responses to a water deficit in black spruce seedlings

Reforestation with planting in northern Europe

Combined effects of short-day treatment and fall fertilization on growth, nutrient status, and spring bud break of Pinus tabulaeformis seedlings

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