Abstract

RESENDE, Geraldo Milanez de; YURI, Jony Eishi; MOTA, José Hortêncio  and  SOUZA, Rovilson José de. Response of crisphead lettuce to rates and application times of molybdenum in winter planting. Ciênc. agrotec. [online]. 2008, vol.32, n.1, pp. 143-148. ISSN 1413-7054.  http://dx.doi.org/10.1590/S1413-70542008000100021.

With the objective of evaluating the influence of molybdenum doses on yield in crisphead lettuce, three experiments were carried out at Três Pontas, State of Minas Gerais, Brazil, from May to July of 2002. The experimental design was in randomized blocks outline with five molybdenum doses (0.0, 35.1, 70.2, 105.3 and 140.4 g/ha) and four replicates, applied through foliar via in three different times (14, 21 and 28 days after transplanting). For total fresh matter one verified quadratic effects in which doses of 83.7, 77.2 and 81.9 g/ha of molybdenum showed the highest yield at 14, 21, and 28 days after transplanting. The highest yield for commercial fresh matter showed the application at 28 days after transplanting in the dose of 77.5 g/ha of molybdenum. The largest stem length was obtained with the dose of 85.6 g/ha of molybdenum. No significant effects of the treatments for commercial head circumference were observed.

Keywords : Lactuca sativa; yield; stem length; commercial head circumference.