AVNI BEHLULI, AGIM CANKO AND SHUKRI FETAHU
1Department of Plant Production, Faculty of Agriculture and Veterinary, University of Prishtina “Hasan Prishtina”, Prishtina, Kosovo
2Department of Plant Sciences and Technologies, Agricultural University of Tirana, Tirana, Albania
In most of the comparative studies of cultivars the determination of production capacity is mainly based on the elements of production. These elements as quantitative indicators are highly influenced by environmental factors. Elements of production are expressions of different photosynthetic activity of cultivars, which are determined by morphophysiological traits, climatic factors and cultivation technology. Knowledge of the physiological bases of beans production would help to better explain the physiological mechanisms and the different potentials of cultivars. For this purpose, four common bean cultivars and lines, representing two different of biological types (growth habit) were studied. Based on the dry matter accumulation (W) and the leaf area, some physiological growth indicators have been calculated. The data obtained argue that there are significant differences between the two biological types of beans based on the leaf area index (LAI) and the dry matter accumulation (DMA) during the plant life cycle of common bean. In the determinant growth habit, differences between cultivars were observed at the end of the reproduction period, where “Lapardha” cultivar had a greater LAI than “Kallmet”, a fact which is reflected in a higher rate of dry matter accumulation. The same phenomenon is also observed when comparing semideterminant lines, where L13-2 had a LAI and dry matter accumulation higher than L232. This prolonged photosynthetic activity results due to the emergence of new leaves, and the different architectural construction of cultivars and lines in the study, which is manifested even in the highest production indicators.
Keywords: Leaf area index, dry matter, plant architecture, line, cultivar, biological type