Desenvolvimento e produção do feijão-mungo sob déficit hídrico em diferentes fases fenológicas

Abstract

Mung bean is an important food legume, with increasing demand for its adaptability to different models of agricultural production. In Brazil, it has potential for second crop cultivation, as an alternative to corn in succession to soybeans or as part of a crop rotation system. Although it is a relatively drought tolerant plant, it is necessary to know the periods of water needs. Thus, the objective of this work was to study the development and production of mung bean cultivated under different conditions of water availability in the vegetative and reproductive phases. The experiment was carried out in a greenhouse at the Faculty of Agricultural Sciences, Federal University of Grande Dourados (FCA/UFGD), located in the municipality of Dourados, MS, Brazil. The work was carried out in a completely randomized design, with 6 treatments and 8 replications. The treatments consisted of different combinations of water supply, calculated based on the field capacity (FC) of the soil, with variations in the vegetative (25 and 100% of CC) and reproductive phases of the plants (25, 65 and 100% of the CC). At flowering, the plant height was evaluated. At the end of the cycle, plant height, shoot and root dry matter mass, production components and grain yield were evaluated. It is concluded that restricting water supply in the vegetative stage of mung bean reduces plant height and that those effects, as well as results of number of grains per pod, can be minimized by water availability in the reproductive stage. Mung beans express greater potential when there is water availability in the vegetative phase, even if there is a reduction in water supply in the reproductive phase.