The use of the fertigation makes possible obtaining good results; however it was noticed the necessity of studies that make possible the correct adoption of this technique. Thus the present study aimed to compare the distribution uniformity of potassium and nitrogen when applied through a trickle irrigation system. The fertilizers solution was applied during 25 minutes; samples of solution were collected at different moments during and after the product injection through irrigation water, and the time limit to collect the last sample was specified as 35 minutes after injection operations begun. In the collected samples were determined the contents of potassium (K+) and nitrogen (NO3- + NH4+). According to obtained results, the conclusions were as follows: there is no significant variation on distribution uniformity of nitrogen and potassium in the trickle irrigation system studied; longer periods of irrigation when in fertigation operation, improve uniformity distribution of the fertilizer, and the irrigation period after the fertilizer injection is finalized should be calculated to improve fertilizer distribution uniformity.
fertigation; fertilizers injection; fertilizers distribution uniformity
