Articles
BIOMASS AND NUTRIENT ACCUMULATION BY APPLE TREES GROWN IN A COMMERCIAL NURSERY
Article number
721_2
Pages
27 – 32
Language
English
Abstract
Two trials to determine the influence of various management practices on the performance of apple (Malus × domestica) trees grown in the Los Olmos commercial nursery, located in San Fernando, VI Region, Chile were conducted.
The first trial was conducted during the 1997-98 growing season and examined the effect of N fertilization rate (0 to 400 kg ha-1 N as urea) on biomass and nutrient accumulation by Royal Gala, Granny Smith and Red Chief Delicious trees grafted on 1- and 2-year-old MM.106 rootstocks.
Biomass accumulation by the Royal Gala and Red Chief trees was unaffected by N rate, while the maximum growth of Granny Smith trees occurred at 100 kg N ha-1. The amounts of N present in apple trees exceeded fertilizer N rates in the 0, 100 and 200 kg N ha-1 application treatments.
About half of the N was partitioned to the leaves, with the shoots and roots each containing about 25%. The second trial was conducted during the 2003-04 growing season and examined the effect of rootstock and scion combination on tree biomass and nutrient accumulation (T1: 1-year-old M.9 rootstock with no grafted scion; 2) T2: 1-year-old Galaxy scion grafted on 1-year-old M.9 rootstock; 3) T3: 1-year-old Galaxy scion grafted on 2-year-old M.9 rootstock). Maximum accumulation of fresh matter was achieved in T3, with around 450 g plant-1 vs. 254 g plant-1 in T1. Nutrient extraction varied from 90 kg N ha-1 in T1, to 138 kg N ha-1 for T3.
The first trial was conducted during the 1997-98 growing season and examined the effect of N fertilization rate (0 to 400 kg ha-1 N as urea) on biomass and nutrient accumulation by Royal Gala, Granny Smith and Red Chief Delicious trees grafted on 1- and 2-year-old MM.106 rootstocks.
Biomass accumulation by the Royal Gala and Red Chief trees was unaffected by N rate, while the maximum growth of Granny Smith trees occurred at 100 kg N ha-1. The amounts of N present in apple trees exceeded fertilizer N rates in the 0, 100 and 200 kg N ha-1 application treatments.
About half of the N was partitioned to the leaves, with the shoots and roots each containing about 25%. The second trial was conducted during the 2003-04 growing season and examined the effect of rootstock and scion combination on tree biomass and nutrient accumulation (T1: 1-year-old M.9 rootstock with no grafted scion; 2) T2: 1-year-old Galaxy scion grafted on 1-year-old M.9 rootstock; 3) T3: 1-year-old Galaxy scion grafted on 2-year-old M.9 rootstock). Maximum accumulation of fresh matter was achieved in T3, with around 450 g plant-1 vs. 254 g plant-1 in T1. Nutrient extraction varied from 90 kg N ha-1 in T1, to 138 kg N ha-1 for T3.
Authors
J.A. Yuri, V. Lepe, C. Moggia, J.L. Vasquez
Keywords
Malus × domestica, mineral nutrition, fertilizer, rootstock, nitrogen
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