Agronomic and productive response to different concentrations and number of treatments of gibberellic acid in artichoke cultivar number 4011
The production of seed propagated artichoke is considered one possible alternative to the propagation by vegetative process of artichoke cultivar 'Blanca de Tudela'. One drawback of using seed propagated artichokes is their late entry into production. In this study different concentrations of gibberellic acid (GA3) and different number of applications are being analysed, in order to evaluate the influence on earliness, yield, quality and crop behaviour. The experiment was carried out at the Experimental Station of Cajamar in Paiporta (Valencia, Spain), using seed propagated cultivar 'Nun 4011'. On July 13, 2017 the potted plants were transplanted into a sandy loam soil, in lines 1.75 apart and 0.80 m between plants in the line. Plants were sprayed three consecutive times every two weeks with GA3 at concentrations 0, 20, 30, 40, 50 and 60 mg L‑1, and it was compared with other two treatments in which it was applied two times at concentrations 30 and 40 mg L‑1, respectively. The first date of GA3 application was August 25. In all treatments a foliar fertiliser was added at 0.1% (v/v) to the GA3 solution. The experimental design was a fully randomised factorial with 5 GA3 concentrations and 2 different frequencies of application; a combination of 3 replications of 9 plants was performed. No differences between doses and number of applications were observed in earliest and final production and also at starting time in the harvest, only the control started production two months later and had no early production. In general, the greatest final yield was achieved by the control, the high concentrations of GA3 could induce lowering of the final yield. The GA3 concentrations produced highest non-commercial production, compared with the control, and especially when three applications were used instead of two. A greater susceptibility of plants treated with GA3 was detected for frost damage vs. control plants.
Baixauli Soria, C., Giner, A., Aguilar, J.M. and Nájera, I. (2020). Agronomic and productive response to different concentrations and number of treatments of gibberellic acid in artichoke cultivar number 4011. Acta Hortic. 1284, 65-70
early yield, final yield, height plants, seed propagated