IFEVA   02662
INSTITUTO DE INVESTIGACIONES FISIOLOGICAS Y ECOLOGICAS VINCULADAS A LA AGRICULTURA
Unidad Ejecutora - UE
artículos
Título:
Comparative growth of oil seed and textile flaz under different nitrogen supplies.
Autor/es:
GIMÉNEZ, P.; SORLINO, D.; TRÁPANI, N.
Revista:
COMMUNICATIONS IN SOIL SCIENCE AND PLANT ANALYSIS
Referencias:
Año: 2007 vol. 38 p. 1425 - 1437
ISSN:
0010-3624
Resumen:
Abstract: The objective of this work was to compare and characterize the response to
nitrogen (N) supply of a textile and an oilseed cultivar of flax (Linum usitatissimum L.).
The dynamics of growth, biomass partitioning, growth rates, and leaf area evolution
and duration of the cultivars Omega (oilseed) and Diane (textile) were compared
under three rates of N supply. Plants were grown in pots in the field with nil (N1),
2.5 (N2), and 5 g N per pot (N3); N2 and N3 doses were divided into five applications.
Shoot biomass of N2 and N3 treatments was similar in both cultivars and significantly
higher than in N1. Partitioning of biomass was unaffected by N treatment but showed
contrasting patterns between cultivars. The oilseed cultivar produced 3042% more
reproductive biomass and 1830% less stem biomass than its textile counterpart.
Differences between cultivars in these traits increased with increasing N rate.
Maximum growth rates per plant concentrated around 15728Cd after sowing (fructification).
Faster leaf senescence after flowering contributed to the lower leaf area and
leaf biomass of the textile cultivar.
The availability of N at different specific moments of the plant cycle would be useful
to improve the growth of organs of economic interest. Results can also provide useful
information to future nutrition models and breeding programs in textile and
oilseed flax.The objective of this work was to compare and characterize the response to
nitrogen (N) supply of a textile and an oilseed cultivar of flax (Linum usitatissimum L.).
The dynamics of growth, biomass partitioning, growth rates, and leaf area evolution
and duration of the cultivars Omega (oilseed) and Diane (textile) were compared
under three rates of N supply. Plants were grown in pots in the field with nil (N1),
2.5 (N2), and 5 g N per pot (N3); N2 and N3 doses were divided into five applications.
Shoot biomass of N2 and N3 treatments was similar in both cultivars and significantly
higher than in N1. Partitioning of biomass was unaffected by N treatment but showed
contrasting patterns between cultivars. The oilseed cultivar produced 3042% more
reproductive biomass and 1830% less stem biomass than its textile counterpart.
Differences between cultivars in these traits increased with increasing N rate.
Maximum growth rates per plant concentrated around 15728Cd after sowing (fructification).
Faster leaf senescence after flowering contributed to the lower leaf area and
leaf biomass of the textile cultivar.
The availability of N at different specific moments of the plant cycle would be useful
to improve the growth of organs of economic interest. Results can also provide useful
information to future nutrition models and breeding programs in textile and
oilseed flax.Linum usitatissimum L.).
The dynamics of growth, biomass partitioning, growth rates, and leaf area evolution
and duration of the cultivars Omega (oilseed) and Diane (textile) were compared
under three rates of N supply. Plants were grown in pots in the field with nil (N1),
2.5 (N2), and 5 g N per pot (N3); N2 and N3 doses were divided into five applications.
Shoot biomass of N2 and N3 treatments was similar in both cultivars and significantly
higher than in N1. Partitioning of biomass was unaffected by N treatment but showed
contrasting patterns between cultivars. The oilseed cultivar produced 3042% more
reproductive biomass and 1830% less stem biomass than its textile counterpart.
Differences between cultivars in these traits increased with increasing N rate.
Maximum growth rates per plant concentrated around 15728Cd after sowing (fructification).
Faster leaf senescence after flowering contributed to the lower leaf area and
leaf biomass of the textile cultivar.
The availability of N at different specific moments of the plant cycle would be useful
to improve the growth of organs of economic interest. Results can also provide useful
information to future nutrition models and breeding programs in textile and
oilseed flax.8Cd after sowing (fructification).
Faster leaf senescence after flowering contributed to the lower leaf area and
leaf biomass of the textile cultivar.
The availability of N at different specific moments of the plant cycle would be useful
to improve the growth of organs of economic interest. Results can also provide useful
information to future nutrition models and breeding programs in textile and
oilseed flax.
Keywords: Biomass accumulation, leaf area, Linum usitatissimum L., nitrogen supply,
partitioningBiomass accumulation, leaf area, Linum usitatissimum L., nitrogen supply,
partitioning