Steady-state nutrient preconditioning and early outplanting performance of containerized black spruce seedlings

Timmer, V. R.; Armstrong, G.; Miller, Brad D.

doi:10.1139/x91-080

Cited by 48 publications

(36 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The fertilizer delivery schedules were based on a reverse exponential function that proportionately matched nutrient addition rate with exponentially declining growth and nutrient uptake rates [18] during hardening off [1,5,11,47]. In theory, the delivery schedule would avoid toxic accumulation of nutrients in the growing medium since nutrient addition rate is synchronized with plant growth and nutrient uptake rates [5,18].…”

Section: Late-season Fertilization Treatments and The Experimental Dementioning

confidence: 99%

“…Examples of current nursery techniques that have promise for improving field performance of seedlings are exponential fertilization [16,18,42,45] and nutrient loading [37,47]. These techniques nutritionally prepare and condition trees for the field environment by matching nutrient supply with crop demand to maximize nutrient reserves in seedlings prior to planting [36,48].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Late-season fertilization of Picea mariana seedlings: intensive loading and outplanting response on greenhouse bioassays

2004

View full text Add to dashboard Cite

-Traditional greenhouse culture involves a late-season hardening period that withholds irrigation and fertilization from black spruce seedlings to promote frost-hardiness. Since nutrient uptake is limited without supplemental fertilization, growth during hardening may lead to internal nutrient dilution, a condition detrimental to field performance of seedlings. We examine whether late-season fertilization, applied as intensive loading, will counter dilution and build up nutrient reserves in seedlings reared conventionally or nutrient loaded before hardening. A mixed NPK fertilizer delivering 0, 12, 24, or, 48 mg N·seedling -1 for 9 weeks after bud set was tested. Root and shoot dry mass increased as much as 104 and 42% during hardening. Seedling biomass, however, was unchanged by late-season fertilization, but N uptake was increased 44-167% signifying induced luxury consumption. Extra K supplementation of treatments averted K dilution in plant tissues often occurring with high N addition. A 13-week outplanting trial on intact soil bioassays retrieved from a boreal site showed that growth and nutrient allocation were significantly enhanced by larger N reserves built up after intensive nutrient loading. About 72-80% of N required for new shoot growth was met from internal cycling, demonstrating the capacity of loading to enhance retranslocation. Intermediate loading (24 mg N) was most effective in promoting N accumulation and outplanting growth of both seedling types. Survival was reduced (30%) only at the highest dose. Study results demonstrate the potential advantage of these practices to improve growth of newly planted seedlings on northern forest sites. black spruce / hardening period / nitrogen / nutrient loading / retranslocation / super-loading Résumé -Fertilisation tardive de semis de Picea mariana : apport intensif et réponse après plantation en serre d'essais biologiques. Les cultures traditionnelles en serre comportent une période tardive d'endurcissement qui retarde l'irrigation et la fertilisation des semis de Picea mariana pour promouvoir l'endurcissement au froid. Puisque le prélèvement de nutriments est limité sans supplémentation de fertilisation, la croissance pendant la période d'endurcissement peut conduire à une dilution interne des nutriments, une situation préjudiciable pour les performances au champ des plants. Nous avons examiné si la fertilisation tardive, appliquée par des apports massifs peut contrebalancer la dilution et accroître les réserves de nutriments dans les semis élevés conventionnellement ou les nutriments apportés avant l'endurcissement. On a testé un mélange de fertilisant NPK libérant 0,12, 24 ou 48 mg d'azote par semis pendant 9 semaines après le débourrement. Le poids sec des racines et des pousses s'est accru de 104 et 42 % pendant l'endurcissement. Cependant la biomasse des semis a été inchangée par une fertilisation tardive, mais le prélèvement d'azote s'est accru de 44 à 167 %, indiquant une consommation de luxe. Une supplémentation en K évite une dilution e...

show abstract

Section: Late-season Fertilization Treatments and The Experimental Dementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Late-season fertilization of Picea mariana seedlings: intensive loading and outplanting response on greenhouse bioassays

2004

View full text Add to dashboard Cite

show abstract

“…The response of sugars to nitrogen level has often been found to be less pronounced than that of starch (Rufty et al 1988;Guidi et al 1998). Fertilization enhances new root growth capacity and the outplanting survival and growth of conifer seedlings from mesic environments (Timmer et al 1991;Van den Driessche 1992;Landis et al 1995). Some studies with P. halepensis and Pseudotsuga indicate that seedling mortality in the field is lower when leaf N concentration is high ( Van den Driessche 1988;Oliet et al 2005).…”

Section: Introductionmentioning

confidence: 99%

Optimization of seasonality and mother plant nutrition for vegetative propagation of Pinus pinaster Ait

et al. 2012

View full text Add to dashboard Cite

Due to the high economic importance of Pinus pinaster Ait., there is considerable interest in developing, improving and extending the use of its families for mass clonal propagation and in breeding programmes. In the current study, we evaluated shoot growth, rooting ability and mini-cuttings production of P. pinaster in response to nitrogen fertilization and seasons. We compared eight half-sib families of P. pinaster from Asturias and Galicia (Northern Iberian Peninsula), searching for useful parameters and growing conditions to be included in a mass propagation program for clonal family forestry. We fertilized P. pinaster seedling mother plants kept in a greenhouse with three levels of nitrogen: high (HN), medium (MN) and low (LN) to evaluate rooting ability of minicuttings. In addition, we evaluated the maximal potential production of rooted mini-cuttings considering nine cycles of propagation over 1 year, also using three levels of nitrogen. The HN treatment significantly influenced the rooting process, with length, area and volume of roots all being positively affected. Spring was the most favourable season for mini-cuttings in the HN treatment. This study provides valuable new information to optimize the clonal propagation protocol for P. pinaster and shows that the mini-cuttings technique has great potential in mass scale cloning, providing high quality sprout production and well-formed new plants.

show abstract

“…For instance, fertilisation is a nursery tool that strongly determines plant functional attributes. In conifers from mesic environments, fertilisation enhances new root growth capacity (RGC) and the outplanting survival and growth of seedlings (Landis, 1985;Timmer et al, 1991;van den Driessche, 1992). However, high N fertilisation can reduce drought tolerance (Tan and Hogan, 1995) and root biomass, and it increases leaf area, shoot size and the shoot-root mass ratio (S/R) (Canham et al, 1996;Graff et al, 1999;Berger and Glatzel, 2001).…”

Section: Introductionmentioning

confidence: 99%

Nursery cultivation regimes, plant functional attributes, and field performance relationships in the Mediterranean oak Quercus ilex L.

Villar-Salvador

Planelles

Enríquez

et al. 2004

Forest Ecology and Management

179

138

View full text Add to dashboard Cite

In this study we have addressed the effect of nitrogen fertilisation and shading used during nursery growth on the functional quality of Quercus ilex L. (holm oak) seedlings and their outplanting performance in an abandoned continental Mediterranean cropland. Three N fertilisation regimes: high and low fertilisation (154 and 34 mg N per plant, respectively) and no fertilisation, combined with two shade levels (full sun and 45% shade) were studied. Fertilisation increased the shoot size, shoot to root mass ratio (S/R), root N, and both shoot and root P concentration of the plants produced in the nursery. Fertilisation also enhanced the capacity of new root formation. Neither tissue K nor root mass was affected by N fertilisation. Shading increased S/R and root K concentration but reduced both shoot and root N concentration. Two years after planting, unfertilised seedlings had higher mortality and grew significantly less than those cultivated at both a low and a high fertilisation level. Shading during nursery growth had no influence on the outplanting performance of holm oak seedlings. Plants with a larger shoot and higher S/R had lower mortality and grew faster than those with a smaller shoot and lower S/R. Outplanting performance of holm oak seedlings was related with root N and P concentration and with RGC. No relationship was found with either shoot nutrient concentration or root mass. We conclude that high N fertilisation of holm oak seedlings in the nursery can improve their early field establishment in the afforestation Mediterranean abandoned croplands. #

show abstract

Steady-state nutrient preconditioning and early outplanting performance of containerized black spruce seedlings

Cited by 48 publications

References 0 publications

Late-season fertilization of Picea mariana seedlings: intensive loading and outplanting response on greenhouse bioassays

Late-season fertilization of Picea mariana seedlings: intensive loading and outplanting response on greenhouse bioassays

Optimization of seasonality and mother plant nutrition for vegetative propagation of Pinus pinaster Ait

Nursery cultivation regimes, plant functional attributes, and field performance relationships in the Mediterranean oak Quercus ilex L.

Contact Info

Product

Resources

About