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The use of irrigation and wood ash are technologies that have been interfering positively in the experimental conduction of some crops in Brazil. The objective of this study was to evaluate the production characteristics and water use in cultivated potted gerbera plants under water availability and wood ash doses. The experiment was conducted in a greenhouse, belonging to the Agricultural and Environmental Engineering course of the Federal University of Mato Grosso, in the city of Rondonopolis, Brazil (16°28' S, 50° 34' W, and altitude of 284 m). The statistical design adopted was randomized blocks, in a 5x5 factorial scheme, with five percentages of water availability (40, 60, 80, 100 and 120% of pot capacity) and five doses of wood ash (0, 8, 16, 24 and 32 g dm -3) with four replicates, totaling 100 experimental units. The variables evaluated were: number of total and open Original Research Article

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In this study, the aim was to determine the phytometric and productive features of Urochloa brizantha cv. BRS Piatã cultivated in Oxisol under the influence of the nitrogen and potassium doses applied. The completely randomized experimental design was adopted in a 5x5 factorial scheme, supplying five doses of nitrogen (0, 100, 200, 300 and 400 mg dm-3) and five doses of potassium (0, 90, 180, 270 and 360 mg dm-3), with four replications. Three shoots were cut at 30-day intervals. Plant height, number of leaves, number of tillers, leaf dry mass, stem dry mass and leaf /stem ratio were assessed. The leaf dry mass at the 370, 287 and 259 mg dm-3 doses of nitrogen in combination with the 360 mg dm-3 potassium doses revealed the biggest yields (7.8, 16.9 and 11.5 g pot-1) for the first, second and third cuts, respectively. Therefore, it was revealed that nitrogen and potassium affected the phytometric characteristics in this grass in an isolated manner by doses of nitrogen potassium. The nitrogen and potassium doses interacted positively to present significantly productive characteristics at all the three cutting procedures performed in the Piatã grass when the nitrogen to potassium ratio was maintained at about 1: 1.