ZESZYT Nr 2 / 2010 Abstrakty Volume No. 2/2010 Abstracts |
 |
| 8.The estimation of water demands
of a determinate and traditional cultivars of faba bean (Vicia faba L.) - Janusz Podleśny and Anna Podleśna Abstract. The experiment was conducted in a greenhouse of the Institute of Soil Science and Plant Cultivation – National Research Institute in Puławy, in the Mitscherlich pots containing a mixture of 5 kg of garden soil and 2 kg of sand. The fi rst-order factors were the two faba bean genotypes: ‘Nadwiślański’ – the traditional type (indeterminate) and ‘Tim’ – a determinate type, and the second-order factor was the substrate moisture content: 30, 50 and 70% fi eld capacity (FWC), maintained throughout the growing season. The potted plants were irrigated using the drip irrigation precision instrument coupled with an automatic controller. During the irrigation, the quantity of given water in the pot was recorded. The shortage of water in the soil adversely affected the dynamics of (mass) accumulation by the vegetative and generative organs of both faba bean cultivars, but the stronger negative impact of drought on the yield was observed on a determinate type than on the traditional type of faba bean ‘Tim’. In the initial stage of growth and development of faba bean both forms exhibited similar water requirements. The differentiation between the water requirements of faba bean cultivars be- came apparent only during the generative development of field bean and lasted from the flowering to the ripening stage. The determinate faba bean cultivar needed less water during the flowering–maturing period than traditional ‘Nadwiślański’ but water deficit during this period resulted in greater reduction of seed yield of ‘Tim’ than of ‘Nadwiślański’. key words: faba beans, a determinate cultivar, a traditional cultivar, water needs, soil moisture levels, % FWC, drought stress, growth and development, yielding |