Root growth characteristics, biomass and nutrient dynamics of seedlings of two larch species raised under different fertilization regimes

Qu, Laiye; Quoreshi, Ali M.; Koike, Takao

doi:10.1023/a:1026159709246

Cited by 49 publications

(46 citation statements)

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“…The N concentration in 50C declined significantly as the experiment proceeded (P < 0.05), suggesting that the constant low rate addition schedule generally resulted in growth dilution. Similar results have been noted for Picea mariana (Quoreshi and Timmer 2000) and two larch species (Qu et al 2003). However, the exponential fertilization treatments induced an increase or stability in the N and P concentrations, confirming that exponential fertilization can be effectively free of growth dilution.…”

Section: Nutrient Uptake Dynamicssupporting

confidence: 84%

“…(Imo and Timmer 1992), Larix kampferi Sarg. and its hybrid larch Larix gmelinii Â Larix kampferi (Qu et al 2003), Tsuga heterophlla (Raf.) Sarg.…”

Section: Introductionmentioning

confidence: 99%

“…In previous studies comparing exponential and conventional fertilization, usually one dosage of fertilizer was involved for comparison of seedling growth and nutrient status between them (Qu et al 2003;Quoreshi and Timmer 2000;Salifu and Jacobs 2006), while things might be different if more levels of fertilizer were used. Additionally, nutrient uptake efficiencies and physiological responses to both kinds of fertilization were hardly compared in these studies.…”

Section: Introductionmentioning

confidence: 99%

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Growth and nutrient uptake dynamics ofMytilaria laosensisseedlings under exponential and conventional fertilizations

Lin

Zeng

et al. 2012

Soil Science and Plant Nutrition

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The growth characteristics and nutrient uptake dynamics of Mytilaria laosensis Lec. seedlings treated weekly with conventional and exponential fertilizations were investigated at intervals of 3 weeks for 12 weeks in a greenhouse. Leaf area and pigment compositions were also examined at the final harvest. The fertility treatments (mg nitrogen seedling -1 ) included two conventional (50C and 100C) and four exponential (50E, 100E, 200E and 400E) fertilizations, and no fertilization (0) as control. The biomass and nutrient contents of M. laosensis seedlings increased exponentially with time. Steady-state nutrition of nitrogen (N) and phosphorus (P) were achieved under exponential fertilization treatment of 50 mg N seedling À1 (50E) and conventional fertilization treatment of 100 mg N seedling -1 (100C), resulting from simultaneous increase of their biomass and nutrient contents. The nutrient uptake efficiency continuously increased over time in conventionally fertilized seedlings, but it increased initially and declined or remained stable from 11 weeks after transplanting in the exponentially fertilized seedlings. At the end of the experiment, the conventionally fertilized seedlings performed remarkably better than all exponentially fertilized seedlings except for seedlings in the exponential treatment of 200 mg N seedling -1 (200E) in height, root collar diameter and biomass. The optimum N and P uptake occurred in 200E seedlings because their N and P contents were 71%/60% and 14%/9% higher than both conventionally fertilized seedlings (50C/100C) without significant differences in growth performance between them. The leaf areas and chlorophyll contents of seedlings increased significantly with the increase of fertilizer levels and nearly peaked at the range from 100 to 200 mg N seedling -1 , whereas the delivery schedule (conventional and exponential) had little effect on leaf areas and chlorophyll contents of seedlings at the same nutrient level (50 or 100 mg N seedling -1 ). These findings will provide evidence to make guidelines on fertilization for nursery production of M. laosensis, and help understand the nutrient demands for this species and further benefit the development of its plantations.

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Section: Nutrient Uptake Dynamicssupporting

confidence: 84%

“…(Imo and Timmer 1992), Larix kampferi Sarg. and its hybrid larch Larix gmelinii Â Larix kampferi (Qu et al 2003), Tsuga heterophlla (Raf.) Sarg.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Growth and nutrient uptake dynamics ofMytilaria laosensisseedlings under exponential and conventional fertilizations

Lin

Zeng

et al. 2012

Soil Science and Plant Nutrition

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“…The application of soluble fertilisers and the addition of slow-release fertilisers to the potting substrate are the two fertilisation methods most commonly used in nurseries [3,37]. Soluble fertilisers can be more precisely adjusted than slow-release ones for each developmental stage of tree seedlings [28,30] and they are commonly applied with the nursery irrigation system. On the other hand, slow-release fertilisers are easier to apply providing an important economical advantage for producing nursery tree seedlings at a commercial scale.…”

Section: Introductionmentioning

confidence: 99%

Influence de la méthode de fertilisation sur la mycorhization contrôlée de deux espèces de Pins méditerranéens

Rincón¹,

Parladé²,

Pera³

2007

Ann. For. Sci.

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-The influence of the fertilisation method: soluble (SF) vs. slow-release fertiliser (SRF) and of inoculation with Laccaria laccata (Scop.) Fr., Pisolithus tinctorius (Pers.) Coker & Couch and Melanogaster ambiguus (Vittad.) Tul & C. Tul. on ectomycorrhizal colonization and growth of Pinus pinea L. and Pinus pinaster Ait. was evaluated. For both pines, mycorrhization with L. laccata was not affected by the fertilisation method. Percentages of ectomycorrhizas (ECM) formed by P. tinctorius were dependent on the fertilisation method, the inoculum type (vegetative or spores) and the pine species involved. ECM formed by M. ambiguus were increased with fertilisation in both pines. Inoculation significantly improved P. pinea biomass when seedlings were fertilised with SRF whereas no effect was found in non-fertilised ones. For non-fertilised P. pinaster, inoculation with L. laccata and both inocula of P. tinctorius increased seedling biomass whereas fertilisation neutralised the fungal effect. Fertilisation increased P. pinea and P. pinaster biomass, independently of the inoculation treatment. Pour les deux pins, la mycorhization avec Laccaria laccata n'a pas été modifiée par la méthode de fertilisation. Le pourcentage d'ectomycorrhizes (ECM) formé by P. tinctorius dépendait de la méthode de fertilisation, su type d'inoculum (spores ou inoculum végétatif) et de l'espèce de pin. La fertilisation a augmenté les ECM produites par Melanogaster ambiguus chez les deux pins. L'inoculation a augmenté significativement la biomasse des semis de Pinus pinea lorsqu'ils ont été fertilisés avec SRF tandis qu'aucun effet n'a été trouvé pour les traitements non fertilisés. Pour les semis non fertilisés de Pinus pinaster, l'inoculation avec Laccaria laccata et avec les deux inoculums de Pisolithus tinctorius a augmenté la biomasse des semis tandis que la fertilisation a neutralisé l'effet de l'inoculation. La fertilisation a augmenté la biomasse de Pinus pinaster et de Pinus pinea indépendamment du traitement d'inoculation utilisé.Pinus pinea / Pinus pinaster / mycorhization contrôlée / champignon ectomycorhizien / pépinière de production de semis / fertilisation

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“…BSP) seedlings [38] and is recommended for commercial production of this species in Ontario, Canada. Although exponential nutrient loading has been examined in deciduous conifers [31] and a tropical angiosperm [8], no published information is available on temperate deciduous species. Exponential nutrient loading may benefit deciduous species because significant quantities of nutrients are resorbed (50-90%) from foliage into root and shoot tissues [1,13,41] prior to leaf senescence.…”

Section: Introductionmentioning

confidence: 99%

Characterizing fertility targets and multi-element interactions in nursery culture ofQuercus rubraseedlings

Salifu

Jacobs

2006

Ann. For. Sci.

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-We quantified and characterized fertility targets for nursery culture of container northern red oak (Quercus rubra L.) seedlings. Plants were supplied with a 15N-5P 2 O 5 -15K 2 O fertilizer at eight rates ranging from 0-150 mg N plant -1 and reared for 18 wk in a greenhouse. Plant growth and nutritional response to increased fertilization followed a curvilinear pattern depicting phases that ranged from deficiency to toxicity. Seedling dry mass production was maximized at sufficiency (25 mg N plant -1 season -1 ) while optimum N and P uptake occurred at 100 mg N plant -1 season -1 . The 150 mg N plant -1 seasonal dose rate induced N and P toxicity, but resulted in antagonistic K interaction. Nutrient loading raised plant N and P contents by 27 and 55%. This new approach demonstrates promise to help refine fertility targets for nursery production of Q. rubra planting stock and may have application to other hardwood species or cultural systems.antagonistic interaction / exponential fertilization / growth / luxury uptake / northern red oak / vector diagnosis Résumé -Caractérisation des objectifs de fertilité et des interactions multiéléments chez des semis de Quercus rubra cultivés en pépinière. Des objectifs de fertilité ont été quantifiés et caractérisés pour des semis de chêne rouge d'Amérique (Quercus rubra L.) cultivés en pépinière. Les semis ont été alimentés avec un engrais 15N-5P2O5-15K2O selon huit taux de 0-150 mg N plant -1 et ont poussés pendant 18 semaines dans une serre. La croissance des semis, leur réponse nutritionnelle à un accroissement de la fertilisation a suivi un modèle curvilinéaire décrivant des phases rangées depuis la carence jusqu'à la toxicité. La production en matière sèche des semis a été maximale à la dose suffisante correspondant à 25 mg N plant -1 saison -1 , tandis que l'optimum de consommation s'est situé à 100 mg N plant -1 saison -1 . La dose saisonnière de 150 mg N plant -1 a induit une toxicité N et P, mais il en est résulté une interaction antagoniste avec K. Le prélèvement de nutriments par les plants a augmenté le contenu en N et P de 27 % et 55 %. Cette nouvelle approche démontre la possibilité d'espérer perfectionner les objectifs de fertilité pour une production en pépinière de plants de Quercus rubra et peuvent avoir une application pour d'autres espèces feuillues et d'autres systèmes culturaux. interaction antagoniste / fertilisation exponentielle / croissance / consommation de luxe / chêne rouge / vecteur diagnose

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Root growth characteristics, biomass and nutrient dynamics of seedlings of two larch species raised under different fertilization regimes

Cited by 49 publications

References 0 publications

Growth and nutrient uptake dynamics ofMytilaria laosensisseedlings under exponential and conventional fertilizations

Growth and nutrient uptake dynamics ofMytilaria laosensisseedlings under exponential and conventional fertilizations

Influence de la méthode de fertilisation sur la mycorhization contrôlée de deux espèces de Pins méditerranéens

Characterizing fertility targets and multi-element interactions in nursery culture ofQuercus rubraseedlings

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