Weeds under two conditions of irrigation in culture of the upland rice
DOI:
https://doi.org/10.20873/jbb.uft.cemaf.v3n4.terraKeywords:
dry stress, weeds, dry mass, Oryza sativa L.Abstract
The objective of the work was to evaluate the weeds and dry mass in the culture of the upland rice, under two conditions of irrigation (with and without it dry stress). The experiment was installed in the Experimental Station of the Campus of Gurupi-TO, belonging to the Federal University of Tocantins (UFT). The survey of the weeds was made to the end of the reproductive cycle of the rice plants, by the sampling method, being the same ones, collected to evaluate the dry mass. Among weed families found in the experiment, it was evidenced occurrence of lesser number (8 families) in area with dry stress in relation to the area without stress (9 families). The number of joined species was the same (13 species) in both areas, having variation, according to the culture environment. The species that more detached had been would type Digitariahorizontalis and Emilia sonchifolia for both conditions. The weeds, in the condition of dry stress, tended to present minor dry mass when comparer to those under condition without it stress for water deficiency.
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