MEDEIROS, T. L. F.; http://lattes.cnpq.br/9858960884946677; MEDEIROS, Thâmara Laysse Freitas.
Résumé:
In semi-arid regions, water deficiency is the main environmental factor that
influences the yield of plants, especially in Vigna beans, making it necessary to
manage resources adequately in order to guarantee the sustainability of the
production system. Thus, the objective was to evaluate the morphology and
partition of phytomass of Vigna beans, cv. BRS Marataoã, when submitted to
irrigation management strategies due to the time of induction of water deficit in
the different phenological stages of the crop and doses of potassium
fertilization. A randomized block design was used in a 5 x 5 factorial scheme,
with three replications. The treatments were defined according to the five doses
of potassium fertilization (50, 75, 100, 125 and 150% of K2O) associated to five
management strategies defined as a function of the time of induction of water
deficit in the different phenological stages of the BRS Marataoã bean. The
application of water deficit in flowering favors the growth and accumulation of
Vigna bean phytomass with plant recovery after stress suspension. Increasing
doses of potassium when associated with water deficit in the flowering and
fruiting phases compromise the number of pods and pod length of Vigna beans.
In the early stages of development of BRS Marataoã beans the water deficit can
be utilized from its cultivation with the lowest losses in the production
components.