Initial sunflower development (Helianthus annus L.) subject to increasing doses of nitrogen and potassium

Abstract

The present study was carried out in the greenhouse of the IFMT Campus Confresa-MT, from April 20 t0 June 06, 2018, the trial containing 10 treatments with 4 repetitions, 5 treatments submiited to increasing doses of nitrogen and 5 treatments submiited to increasing doses of potassium, For doses of N 0,20,40,60 and 80 kg ha-1 were and for doses of K, 0,10,20,30,40 k ha‑1 the fertilizations were made with. 7,14 and 21 days after the emergence of the plants. The experiment was installed in 2 Lt, 2 dcm³ pet bottles. The characteristics evaluated were stem diameter (DC), number of leaves (NF), plant height (AP), fresh shoot weight (MPFA), fresh root weight (MFR), it was observed that statistically all treatments had a significant difference at 1% probability, plus some hypotheses that can be described that in the evaluation number of leaves at increasing doses of potassium, the control had a higher average result. Light, standardized doses of ferti-irrigation etc. nevertheless an extremely importante result for the discussion and for carrying out experiments in the fututre, however the best answers were if obtained in the variables fresh weight of the aerial part (MFPA) and fresh mass of the root (MFR), in the future we may have more results, with the repetition of the experimente and see the difference between them.

Keywords

• plant height, nitrogen, potassium