Articles
PRODUCTIVE RESPONSE TO GIBBERELLIC ACID IN THREE CULTIVARS OF SEED PROPAGATED ARTICHOKE
Article number
942_53
Pages
361 – 367
Language
English
Abstract
The usual artichoke productive cycle in The Spanish Mediterranean Coast with common clone varieties happens from October to May, but the most interesting period is from middle October to first March.
Plants of three seed propagated cultivars (Imperial Star, Harmony and Madrigal), which were planted on 1 August 2005; were sprayed three times between 20 September and 20 October 2005 with gibberellic acid (GA3), at doses of 30, 60 and 90 mg L-1 (D1, D2 and D3 respectively); so that it was applied a total of 375 L ha-1. Three replicates of 10 plants per cultivar were arranged in a completely randomized design.
The highest early yields (until the end of January 2006) were obtained with all GA3 doses compared to the control, and with Imperial Star and Harmony against Madrigal. GA3 doses did not affect early production of Imperial Star. Nevertheless in Harmony and mainly in Madrigal, the higher doses caused earlier productions, having been found significant interactions (GA3 doses x cultivar). The total commercial yield (until the end of May 2006) was higher on control plants and D1 and D2 treated plants, than on D3 plants.
The total commercial yield was also higher in Madrigal than in Harmony and Imperial Star. Besides, in Imperial Star and Harmony the total commercial yields decreased as GA3 doses were increased.
Head weight in the early and total commercial production was similar among cultivars and was not affected by the GA3 dose.
On the other hand the incidence of open bracts in the early production was higher on D2 and D3 treated plants, and this incidence was higher in Imperial Star than in Harmony and Madrigal along all the experiment with statistically differences.
Plants of three seed propagated cultivars (Imperial Star, Harmony and Madrigal), which were planted on 1 August 2005; were sprayed three times between 20 September and 20 October 2005 with gibberellic acid (GA3), at doses of 30, 60 and 90 mg L-1 (D1, D2 and D3 respectively); so that it was applied a total of 375 L ha-1. Three replicates of 10 plants per cultivar were arranged in a completely randomized design.
The highest early yields (until the end of January 2006) were obtained with all GA3 doses compared to the control, and with Imperial Star and Harmony against Madrigal. GA3 doses did not affect early production of Imperial Star. Nevertheless in Harmony and mainly in Madrigal, the higher doses caused earlier productions, having been found significant interactions (GA3 doses x cultivar). The total commercial yield (until the end of May 2006) was higher on control plants and D1 and D2 treated plants, than on D3 plants.
The total commercial yield was also higher in Madrigal than in Harmony and Imperial Star. Besides, in Imperial Star and Harmony the total commercial yields decreased as GA3 doses were increased.
Head weight in the early and total commercial production was similar among cultivars and was not affected by the GA3 dose.
On the other hand the incidence of open bracts in the early production was higher on D2 and D3 treated plants, and this incidence was higher in Imperial Star than in Harmony and Madrigal along all the experiment with statistically differences.
Authors
C. Baixauli, A. Giner, J.M. Aguilar , I. Nájera, A. Miguel , S. López Galarza, B. Pascual, A. San Bautista , J.V. Maroto
Keywords
gibberellic acid, productive cycles, yields, open bracts
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