ISHS Acta Horticulturae 730: VI International Symposium on Artichoke, Cardoon and Their Wild Relatives
VEGETATIVE GROWTH PARAMETERS IN ARTICHOKE |
| Authors: | L. Rincón, A. Pérez, C. Pellicer, A. Abadía, J. Sáez |
| Keywords: | Cynara scolymus L., dry weight, leaf area index, crop growth, leaf growth, head growth, net assimilation |
| Abstract:
The experiment was situated at the Campo de Cartagena in the Murcia Region (37°40’N - 0°58’W), an area of long standing artichoke cultivation. The vegetative growth parameters of artichoke [(Cynara cardunculus L. var. scolymus L. (Fiori)] cv. Blanca de Tudela was studied and quantified with a density of 1 plant m-2. Plants were sampled, fractionated (leaves, petioles, stems and fruits), dried and weighed at 38, 73, 101, 165, 200, 222 and 256 days after transplanting. During this time 27.3 t ha-1 of marketable fruits were picked in 10 marketable harvests with a medium weight fruit of 164 g. The yield was increasing up to 205 days after transplanting in which 6.1 t ha-1 was harvested and it was diminishing at the end of the growth. The total amount of dry matter produced was 15.5 t ha-1 in which the leaves contributed 67.0% stems 5.6% and fruits 27.4%. The total leaf area index (LAI) was 8.8 at 256 days after transplanting, showing the highest leaf efficiency, expressed as net assimilation rate (NAR), between 38 and 73 days after transplanting. The maximum rate of growth (CGR) occurred between 200 and 222 days after transplanting, period of the highest vegetative growth. The highest head growth rate (FGR) happened between 138 and 166 days after transplanting and it was consequence of the highest removal fruits. Leaf efficiency as measure by mean net assimilation rate was the highest between 38 and 73 days after transplanting coinciding with highest mean relative growth rate. | |
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