P. Nygren

发表

The use of x-ray computed tomography for creating computational models of corn stalks and other plants : advantages , benefits , and common challenges

E. Nikinmaa, C. Godin, A. Lintunen, 2013 .

Tree roots as self-similar branching structures: axis differentiation and segment tapering in coarse roots of three boreal forest tree species

Risto Sievänen, Tuomo Kalliokoski, T. Kalliokoski, 2010, Trees.

Coarse root architecture of three boreal tree species growing in mixed stands

Risto Sievänen, Tuomo Kalliokoski, T. Kalliokoski, 2008 .

Natural abundance of 15N in two cacao plantations with legume and non-legume shade trees

P. Nygren, H. Leblanc, 2009, Agroforestry Systems.

Belowground interspecific competition in mixed boreal forests: fine root and ectomycorrhiza characteristics along stand developmental stage and soil fertility gradients

T. Kalliokoski, R. Sievänen, H. Helmisaari, 2010, Plant and Soil.

Application of the pipe model theory to non-destructive estimation of leaf biomass and leaf area of pruned agroforestry trees

P. Nygren, S. Rebottaro, R. Chavarría, 1993, Agroforestry Systems.

Effects of potassium deficiency and simulated acid rain, alone and in combination, on the ultrastructure of Scots pine needles

T. Holopainen, P. Nygren, 1989 .

A fractal root model applied for estimating the root biomass and architecture in two tropical legume tree species

Eduardo Salas, Harry Ozier-Lafontaine, H. Ozier-Lafontaine, 2004 .

Above-ground nitrogen dynamics following the complete pruning of a nodulated woody legume in humid tropical field conditions

P. Nygren, 1995 .

Estimating biological N2 fixation by a tropical legume tree using the non-nodulating phenophase as the reference in the 15N natural abundance method

F. Berninger, A. Domenach, C. Ramirez, 2001 .

Nitrogen-fixation dynamics in a cut-and-carry silvopastoral system in the subhumid conditions of Guadeloupe, French Antilles

J. Sierra, P. Nygren, M. Dulormne, 2003, Agroforestry Systems.

Decomposition of woody legume nodules in two tree/grass associations under contrasting environmental conditions

P. Nygren, A. Lorenzo, P. Cruz, 2000, Agroforestry Systems.

Dinitrogen fixation by legume shade trees and direct transfer of fixed N to associated cacao in a tropical agroforestry system.

P. Nygren, H. Leblanc, 2015, Tree physiology.

Detection of nitrogen transfer from N2-fixing shade trees to cacao saplings in 15N labelled soil: ecological and experimental considerations

P. Nygren, H. Leblanc, Miika Kurppa, 2010, Agroforestry Systems.

Dynamics of nonstructural carbohydrates and biomass yield in a fodder legume tree at different harvest intensities.

P. Nygren, L. Desfontaines, H. Garcia, 2001, Tree physiology.

Nodulation and dinitrogen fixation of legume trees in a tropical freshwater swamp forest in French Guiana

A. Domenach, J. Roggy, P. Nygren, 2003, Journal of Tropical Ecology.

The role of nitrogen fixation and nutrient supply in some agroforestry systems of the Americas

P. Nygren, D. Kass, R. Sylvester-Bradley, 1997 .

Arbuscular mycorrhizal symbioses in a cut-and-carry forage production system of legume tree Gliricidia sepium and fodder grass Dichanthium aristatum

J. Sierra, R. Jalonen, P. Nygren, 2013, Agroforestry Systems.

Dinitrogen-fixation by three neotropical agroforestry tree species under semi-controlled field conditions

P. Nygren, H. Leblanc, R. McGraw, 2007, Plant and Soil.

Transfer of nitrogen from a tropical legume tree to an associated fodder grass via root exudation and common mycelial networks.

J. Sierra, R. Jalonen, P. Nygren, 2009, Plant, cell & environment.

INTERNAL CIRCULATION OF CARBON WITHIN A TREE

P. Hari, P. Nygren, E. Korpilahti, 1991 .

Application of the FracRoot model to three boreal tree species.

T. Kalliokoski, R. Sievänen, P. Nygren, 2007 .

Transfer of N fixed by a legume tree to the associated grass in a tropical silvopastoral system

J. Sierra, P. Nygren, 2006 .

Influence of forage harvesting regimes on dynamics of biological dinitrogen fixation of a tropical woody legume.

J. Sierra, A. Domenach, P. Cruz, 2000, Tree physiology.

Belowground interspecific competition in mixed boreal forests: the effect of stand developmental stage and soil fertility on the ectomycorrhiza and fine root characteristics

T. Kalliokoski, R. Sievänen, H. Helmisaari, 2009 .

Fine root and nodule dynamics of Erythrina poeppigiana in an alley cropping system in Costa Rica

P. Nygren, P. Chesney, 2002, Agroforestry Systems.

Leaf CO(2) exchange of Erythrina poeppigiana (Leguminosae: Phaseolae) in humid tropical field conditions.

P. Nygren, Pekka Nygren, 1995, Tree physiology.

Response of Theobroma cacao and Inga edulis seedlings to cross-inoculated populations of arbuscular mycorrhizal fungi

P. Nygren, H. Leblanc, E. Salas, 2011, Agroforestry Systems.

Root exudates of a legume tree as a nitrogen source for a tropical fodder grass

J. Sierra, R. Jalonen, P. Nygren, 2009, Nutrient Cycling in Agroecosystems.

Effects of nitrogen source and defoliation on growth and biological dinitrogen fixation of Gliricidia sepium seedlings.

A. Domenach, P. Cruz, P. Nygren, 2000, Tree physiology.

Implications of the Kyoto Protocol for tropical forest management and land use: prospects and pitfalls

F. Berninger, J. Koskela, O. Luukkanen, 2000 .

Symbiotic dinitrogen fixation by trees: an underestimated resource in agroforestry systems?

P. Nygren, H. Leblanc, J. Harmand, 2012, Nutrient Cycling in Agroecosystems.

Modelling of reserve carbohydrate dynamics, regrowth and nodulation in a N2-fixing tree managed by periodic prunings

Risto Sievänen, Eero Nikinmaa, Frank Berninger, 2000 .

Neotropical Legume Tree Inga edulis Forms N2-fixing Symbiosis with Fast-growing Bradyrhizobium Strains

P. Nygren, H. Leblanc, C. Roux, 2005, Plant and Soil.

Distribution of coarse and fine roots of Theobroma cacao and shade tree Inga edulis in a cocoa plantation

P. Nygren, Miao Lu, H. Leblanc, 2013, Annals of Forest Science.

Nitrogen transfer from a legume tree to the associated grass estimated by the isotopic signature of tree root exudates : A comparison of the 15N leaf feeding and natural 15N abundance methods

J. Sierra, A. Domenach, P. Nygren, 2007 .

Growth of three oak species during establishment of an agroforestry practice for watershed protection

H. E. Garrett, R. Udawatta, P. Nygren, 2005 .

Green mulch decomposition and nitrogen release from leaves of two Inga spp. in an organic alley-cropping practice in the humid tropics

P. Nygren, H. Leblanc, R. L. McGraw, 2006 .

Components of functional-structural tree models

Harri Hakula, Jari Perttunen, Risto Sievänen, 2000 .

Leaf and root litter of a legume tree as nitrogen sources for cacaos with different root colonisation by arbuscular mycorrhizae

T. Pennanen, P. Nygren, H. Leblanc, 2011, Nutrient Cycling in Agroecosystems.

Production and turnover of N2 fixing nodules in relation to foliage development in periodically pruned Erythrina poeppigiana (Leguminosae) trees

C. Ramirez, P. Nygren, 1995 .

Symbiotic dinitrogen fixation by trees: an underestimated resource in agroforestry systems?

P. Nygren, H. Leblanc, J. Harmand, 2012, Nutrient Cycling in Agroecosystems.

Application of the functional-structural tree model LIGNUM to growth simulation of short-rotation eastern cottonwood

Jari Perttunen, David R. Larsen, S. Pallardy, 2011 .

Tree species diversity and forest structure in relation to microtopography in a tropical freshwater swamp forest in French Guiana

Daniel Sabatier, Alain Rousteau, D. Sabatier, 2004, Plant Ecology.

Leaf and root litter of a legume tree as nitrogen sources for cacaos with different root colonisation by arbuscular mycorrhizae

T. Pennanen, P. Nygren, H. Leblanc, 2011, Nutrient Cycling in Agroecosystems.

Sustainable use of renewable natural resources: from principles to practices.

A. Jalkanen, P. Nygren, Pekka Nygren, 2005 .

Biomass allocation and nodulation of Gliricidia sepium under two cut-and-carry forage production regimes

P. Nygren, P. Cruz, Pablo Cruz, 1998, Agroforestry Systems.

Role of root inputs from a dinitrogen-fixing tree in soil carbon and nitrogen sequestration in a tropical agroforestry system

J. Sierra, P. Nygren, 2005 .

Summary Effects of three forage harvesting regimes—total removal of foliage and branches once (T-12) or twice a year (T-6) and 50% removal every 2 months (P-2)—on growth and biological dinitrogen fixation of Gliricidia sepium (Jacq.) Walp

J. Sierra, A. Domenach, P. Nygren, 2000 .

Effects of turnover and internal variability of tree root systems on modelling coarse root architecture: comparing simulations for young Populus deltoides with field data

H. Ozier-Lafontaine, P. Nygren, Miao Lu, 2009 .

Applying a universal scaling model to vascular allometry in a single-stemmed, monopodially branching deciduous tree (Attim's model).

S. Pallardy, P. Nygren, Pekka Nygren, 2008, Tree physiology.

F F S S P P M M 0 0 4 4 Oral Presentations -session 3 a Comparison of Two Fractal Models for Describing Whole Tree Structure

P. Nygren, Pekka Nygren, Miao Lu, 2022 .