DIFERENTS TEMPERATURE OF WATTERS IRRIGACION IN BEAN CROP

Abstract

Among the bean sowing periods, the one considered "winter" or "irrigated" is the one sown in the period without "rains" from May to September, needing only irrigation. The most common form of irrigation of "winter" beans occurs through central irrigation pivots, in these systems the water walks long distances from bodies of water, reaching plants with the most distinct physical, chemical and even temperature characteristics. Therefore, the objective of the work was to verify the influence of different temperatures of the irrigation water, on the common bean cultivar Dama. The experiment was carried out in the greenhouse at UFMT and the irrigation of common bean plants in 8 L pots was used as treatment, distributed in four random blocks between June and July. The following temperatures were applied : 10 ° C, 15 ° C, 20 ° C, 25 ° C, 30 ° C, 35 ° C and 40 ° C. Irrigation with different temperatures was carried out from sowing to the beginning of flowering, stage R1. The vegetative growth of the plants (height; number of leaves; leaf area and dry mass of the aerial part, the root dry mass) and the levels of chlorophyll® were evaluated. There were no statistical differences in the variables, height, diameter, leaf area, number of leaves and dry mass of aerial part. The water applied at a temperature of 30 ° C made the plants reach a higher root weight, whereas the treatment of 35 ° C showed better results for the chlorophyll® index.