NPK FERTILIZER AS A GROWTH PROMOTER IN LETTUCE
DOI:
https://doi.org/10.36725/agries.v5i0.1215Keywords:
Lactuca sativa L.,, características agronômicas, adubação química, produtividade.Abstract
Lettuce is the main leafy vegetable marketed and consumed in Brazil, being considered the one with the highest commercial value. The objective of this work was to evaluate lettuce agronomic characteristics under different doses of NPK fertilization. The experiment was conducted in an urban garden in the city of Gurupi in the state of Tocantins. A randomized complete block design with four replications and six treatments of NPK fertilizer formulation (05-25-15) was used: 0; 50; 100; 150; 200 and 250 kg ha-1 of the formulated. The lettuce cultivar used was SVR 2005, which was evaluated: head diameter; productivity; commercial mass; total mass; stem length; number of commercial sheets and number of total sheets. Commercial yield of 14.5 t ha-1 was observed at 157.4 kg of NPK. Doses above 200 kg ha-1 resulted in reduction of increments for all evaluated characteristics. The head diameter had its maximum point at the dose of 172.9 kg ha-1 NPK.
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