Effet de l'apport de phosphore, de carbonate de calcium et d'oligo-éléments (Cu, Mn, Zn, B) à trois sols sableux acides sur la croissance et la nutrition de semis de Pinus pinaster Soland in Ait. I. Croissance et nutrition en éléments majeurs

Saur, E.

doi:10.1051/agro:19891001

Cited by 4 publications

(5 citation statements)

References 3 publications

(3 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The P deficiency of the seedlings growing in mineral soil is not surprising since the acid sandy soils (podzol) of the Landes de Gascogne are known to be poor in P (Augusto et al, 2006;Trichet et al, 1999). Pot experiments (Saur, 1989) and fertilization trials (Trichet et al, 2000; showed that P is the main limiting factor for tree growth in the forest of the Landes de Cascognes. Other limiting factors appear only when the P limitation has been removed (Trichet et al, 2008).…”

Section: Phosphorus Limiting Factor For Seedling Growthmentioning

confidence: 99%

Forest floor contribution to phosphorus nutrition: experimental data

et al. 2009

View full text Add to dashboard Cite

HAL is a multi-disciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not. The documents may come from teaching and research institutions in France or abroad, or from public or private research centers. L'archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de documents scientifiques de niveau recherche, publiés ou non, émanant des établissements d'enseignement et de recherche français ou étrangers, des laboratoires publics ou privés. Copyright

show abstract

Section: Phosphorus Limiting Factor For Seedling Growthmentioning

confidence: 99%

Forest floor contribution to phosphorus nutrition: experimental data

et al. 2009

View full text Add to dashboard Cite

show abstract

“…Effects of other fertilizers on growth (i.e. N, K) have sometimes been recorded as well in the earlier fertilisation experiments but less consistently (Bonneau 1995;Saur 1989) and have not made it into common forestry practice. Nitrogen has been proposed as a further potential growth limitation together with P and water, related to low levels of soil N, low N inputs into the system contrasting with increasing outputs of N due to harvests Trichet et al 1999).…”

Section: Introductionmentioning

confidence: 96%

“…Despite a fair amount of consensus among foresters on the positive effect of P fertilizers on growth at humid sites to mesic sites, but not on dry sites (Bonneau 1995), some humid sites appear not to respond to P fertilizers. Water limitation as a possible explanation for the lack of P response at the dry sites (Bonneau 1995) was invalidated by Saur (1989) who compared seedling performance and nutrient immobilisation on soils collected from different sites in a growing experiment with fertilizers under non limiting water levels. In addition to this, the growth conditions that were the basis for the recommendations on P fertilisation in the 1960's -such as productivity levels, rotation length, genetic material used but also ambient carbon dioxide levels -have evolved and this is likely to have consequences for the needs and supplies of major mineral elements as N, P, K, Ca and Mg and the nutrient budgets for these elements in this forest area.…”

Section: Introductionmentioning

confidence: 99%

“…More elaborated nutrient uptake models using external supply / internal demand regulations (Dunbabin et al 2002) already have been validated for Maize in the same region and on the same soil (Mollier et al 2001) and would be powerful tools to link total tree demand via the uptake system with soil available mineral nutrients. Relevant studies on Pinus pinaster on the relations between nutrients and growth (Cheaïb et al 2005;Saur 1989) in presence or not of mycorrhizal partners (Aquino and Plassard 2004;Conjeaud et al 1996) have been essentially conducted on seedlings or small trees in containers or hydroponics and are not directly transposable to in situ conditions. Published data on in situ root distribution of Pinus pinaster are scarce and have considered fine root biomass (Cornu 1994;Maugé 1974;Robert 1998;Thevenot 1995;Vaché 1995), but not the more relevant root length or root surface.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Fine root distribution of trees and understory in mature stands of maritime pine (Pinus pinaster) on dry and humid sites

2006

View full text Add to dashboard Cite

Maritime pine (Pinus pinaster) is the main tree cropping species in the Landes of Gascogne forest range in south western France. Soils are nutrient poor, sandy podzosols and site fertility is determined essentially by organic matter content and depth of water table, which is known to limit root growth. We hypothesised, with an ultimate goal of constructing a nutrient uptake model applicable to this region, that the organic top horizons together with the depth of the water table should be the most important parameters related to fine root distribution and presence of associated mycorrhiza. To test this hypothesis, we compared two adult Pinus pinaster stands, contrasting in depth of water table and soil fertility and evaluated fine roots (diameter £2 mm) of understory species and fine roots and ectomycorrhizal morphotypes of Pinus pinaster down to 1.2 m, using a soil corer approach. Total fine root biomass of Pinus pinaster was not significantly different between both sites (3.6 and 4.5 t ha -1 for the humid, respectively, dry site), but root distribution was significantly shallower and root diameter increased more with depth at the humid site, presumably due to more adverse soil conditions as related to the presence of a hardpan, higher amount of aluminium oxides and / or anoxia. Fine roots of Pinus pinaster represented only about 30% of total fine root biomass and 15% of total fine root length, suggesting that the understory species cannot be ignored with regards to competition for mineral nutrients and water. A comparison of the ectomycorrhizal morphotypes showed that the humid site could be characterised by a very large proportion of contact exploration types, thought to be more relevant in accessing organic nutrient sources, whereas the dry site had a significantly higher proportion of both long-distance and short-distance exploration types, the latter of which was thought to be more resistant to short-term drought periods. These results partly confirm our hypothesis on root distribution as related to the presence of soil mineral nutrients (i.e. in organic matter), point out the potential role of understory plant species and ectomycorrhizal symbiosis and are a valuable step in building a site-specific nutrient uptake model.

show abstract

“…The experiment was conducted on maritime pine (Pinus pinaster Aït. ), a shade-intolerant species grown in southwestern Europe on soils characterised by a low phosphorus availability [50,51]. Numerous studies have reported a positive effect of P fertilization on maritime pine growth in this context [21,54,56].…”

Section: Introductionmentioning

confidence: 99%

Interactive effects of phosphorus and light availability on early growth of maritime pine seedlings

Cheaib¹,

Mollier²,

Thunot³

et al. 2005

Ann. For. Sci.

View full text Add to dashboard Cite

-We examined the response of early growth of maritime pine seedlings to combined levels of light and phosphorus. Seedlings were grown under three levels of phosphorous availability, i.e., two relative addition rates (RAR = 2 and 4 g P (100 g -1 )P d -1 ) and a free-access to P, crossed with two light levels (photosynthetic photon flux densities of 150 and 450 µmol m -2 s -1 , respectively). Relative growth rate (RGR) and relative uptake rate of phosphorus (RUR) were computed, as well as the amount of light absorbed per seedling. We found that phosphorus and light acted as limiting factors with a complex interaction. Under low light and at the lowest P level, P and light were co-limiting, i.e., growth was enhanced only when P and light were increased together. Light was the limiting factor for growth under low light conditions at all other levels of P availability. P was the limiting factor at a RAR of 2% under high light. Enhancing P from 4% to free access did not significantly improve growth under high light. RUR was controlled systematically by P availability at 2 and 4% RAR. RGR values were close to RUR values except under free access to P. Therefore, growth-independent accumulation of P was observed under high P conditions. The differences in biomass production among P treatments were explained primarily by the reduced amount of radiation intercepted by the seedlings as a consequence of their reduced leaf area. No effect of P treatments were observed on the calculated radiation-use efficiency (RUE), which was found to be larger under low light. This confirms that pine seedlings adjust to moderate phosphorus deficiency mainly by changing their morphology (leaf area, dry-mass partitioning) while biochemical and photochemical limitations of photosynthesis play only a very secondary role.phosphorus nutrition / shade / growth / Pinus pinaster Aït.Résumé -Interaction des effets de la disponibilité en phosphore et en lumière sur la croissance de jeunes plants de pin maritime. La croissance de jeunes plants de pin maritime a été suivie en chambre de culture à deux niveaux d'éclairement et trois de disponibilité en phosphore. Deux taux d'addition relatifs en P (RAR = 2 et 4 g P (100 g -1 P j -1 ) et un libre accès au P ont été appliqués en combinaison avec deux niveaux d'éclairement (150 et 450 µmol m -2 s -1 ). Le taux de croissance relatif (RGR) et le taux d'absorption relatif de P (RUR) ont été calculés. La surface foliaire, la quantité de rayonnement absorbé et l'efficience d'utilisation du rayonnement (RUE) ont aussi été estimés. Les disponibilités en phosphore et en lumière ont limité la croissance suivant un schéma d'interaction complexe. Au plus faible niveau d'éclairement et d'ajout en phosphore, les deux facteurs étaient co-limitants et la croissance n'était augmentée que lorsque les deux facteurs augmentaient simultanément. La lumière était le facteur limitant pour les traitements sous faible éclairement à tous les autres niveaux de disponibilité en P. Le phosphore était limitant pour des RAR de 2...

show abstract

Effet de l'apport de phosphore, de carbonate de calcium et d'oligo-éléments (Cu, Mn, Zn, B) à trois sols sableux acides sur la croissance et la nutrition de semis de Pinus pinaster Soland in Ait. I. Croissance et nutrition en éléments majeurs

Cited by 4 publications

References 3 publications

Forest floor contribution to phosphorus nutrition: experimental data

Forest floor contribution to phosphorus nutrition: experimental data

Fine root distribution of trees and understory in mature stands of maritime pine (Pinus pinaster) on dry and humid sites

Interactive effects of phosphorus and light availability on early growth of maritime pine seedlings

Contact Info

Product

Resources

About