Irrigação por gotejamento e fertirrigação com nitrogênio e potássio em tomateiro (Lycopersicum esculentum).

Abstract

Under edaphoclimatic conditions of "cerrada" areas of central Brazil it was study the tomato behavior when submitted to suplementary trickle irrigation and two Nitrogen­Potassium le ­ vels. Irrigation water was applied on amounts of 0.8, 10 and 1.2 times the water evaporated from a class A evaporation pan. It was verified no significant influence among treatments on the total truit yields per hectare, however, significant diference among treatments was found for the production of high quality fruits. High leveis of Amonium Sulphate increased the number and weight of tomatos with the stem rot being independent of the amount of irrigation water applied. The snallest irrigation level together with 1400 kg/ha of Amonium Sulphate and 918 kg/ha of Potassium Chloride showed the best water use efficiency.