Consulta: creatorFacets:"Mason,Euan G"
Registros recuperados: 4
Data/hora: 12/06/2024 16:24:53

Chlorophyll fluorescence response of Pinus radiata clones to nitrogen and phosphorus supply
Provedor de dados: 118
Autores: Bown,Horacio E; Mason,Euan G; Clinton,Peter W; Watt,Michael S.
Chlorophyll fluorescence responses to a factorial combination of nitrogen (N) and phosphorus (P) supply were measured in five clones of Pinus radiata cultivated in a greenhouse over twenty-four months. Chlorophyll fluorescence measurements were taken at months six (5 clones, 182 plants), nine (2 clones, 68 plants) and eighteen (2 clones, 48 plants). Plant growth in stem diameter, height, leaf area, fascicle mass, length and diameter were found to significantly increase with N and, to a lesser extent, P additions; and these values were greatest when both N and P were combined. Plant growth and fascicle size also varied significantly across clones and were generally consistent with the genotypic growth responses that were observed in the field. Dark (Fv /...
Tipo: Journal article
Palavras-chave: Chlorophyll fluorescence; Quantum efficiency of PSII; Electron transport; Genotype; Nutrient limitation.
Ano: 2009
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202009000300012

The influence of N and P supply and genotype on N remobilization in containerized Pinus radiata plants
Provedor de dados: 118
Autores: Bown,Horacio E; Watt,Michael S; Clinton,Peter W; Mason,Euan G.
A large proportion of the nitrogen (N) used in the current-year growth of the widely grown plantation species Pinus radiata D. Don is N that was stored in plant tissues the previous year. However, the extent to which an imbalance between levels of phosphorus (P) and N may change the capacity of plants to remobilize N is unknown. In this study, the N remobilization responses of four P. radiata genotypes to a factorial combination of N and P additions were assessed in containerized plants in a two-year greenhouse experiment. N supply was enriched with 15N at 2.5%o(labeled N) during the first year. Plants were then transferred to clean sand and grown for another year with 15N at levels close to natural levels (0.3664899 atom percent 15N, &amp;#948;15N...
Tipo: Journal article
Palavras-chave: Genotypes; Nitrogen; Nutrient remobilization; Phosphorus; Pinus radiata.
Ano: 2012
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202012000300010

Soil C/N influences the carbon flux and partitioning in control and fertilized mini-plots of Pinus radiata in New Zealand
Provedor de dados: 118
Autores: Bown,Horacio E; Watt,Michael S; Clinton,Peter W; Mason,Euan G.
Patterns of carbon flux and partitioning were examined in highly stocked (40,000 stems ha-1) control and fertilized mini-plots of Pinus radiata D. Don at five sites, which covered a wide climatic and edaphic gradient on the South Island of New Zealand. The gross-primary productivity (GPP) and the partitioning of the GPP to the above- and below-ground productivity and respiration were determined using a carbon budget approach. All of the components of the GPP, the above-ground net primary productivity (ANPP [r² = 0.67, P &amp;#8804; 0.01]), above-ground plant respiration (APR [r² = 0.66, P &amp;#8804; 0.01]), and total below-ground carbon flux (TBCF [r² = 0.41, P &amp;#8804; 0.01]) significantly increased with the GPP, but the ANPP:GPP, APR:GPP and TBCF:GPP...
Tipo: Journal article
Palavras-chave: Gross- primary productivity; Net-primary productivity; Nitrogen; Pinus radiata D. Don; Phosphorus; Total below-ground carbon flux; Whole carbon budget.
Ano: 2011
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202011000200013

A potential nutritional modifier for predicting primary productivity of Pinus radiata in New Zealand using a simplified radiation-use efficiency model
Provedor de dados: 118
Autores: Bown,Horacio E; Mason,Euan G; Watt,Michael S; Clinton,Peter W.
H.E. Bown, E.G. Mason, M.S. Watt, and P.W. Clinton. 2013. A potential nutritional modifier for predicting primary productivity of Pinus radiata in New Zealand using a simplified radiation-use efficiency model. Cien. Inv. Agr. 40(2): 361-374. The 3-PG (Physiological Principles in Predicting Growth) radiation-use efficiency model has been widely used and tested for predicting the primary productivity of forests all over the world. This radiation-use efficiency model accounts for plant nutrition through a user-defined dimensionless fertility parameter (fN) that determines the effects a unit of radiation. Currently, this fertility parameter has to be entered by the user based on intuition or experience. The goal of this study was to propose a fertility...
Tipo: Journal article
Palavras-chave: Nutritional modifier; Pinus radiata; Primary productivity; Radiation-use efficiency; Soil C/N; Soil N.
Ano: 2013
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202013000200011