Yield of crisphead lettuce under different amounts of irrigation

Joaquim Alves Lima Junior, Geraldo Magela Pereira, Luciano Oliveira Geisenhoff, Renato Carvalho Vilas Boas, Welligton Gomes da Silva, Andre Luiz Pereira Silva

Abstract


With the aim of minimizing the difficulties faced by the producers on cultivating the crisphead lettuce (Lactuta sativa L), specifically those related to the lack of technical information about the quantity of water to be applied, a study was made in order to determine the effect of various water depths on crisphead lettuce yielding characteristics. The experiment was carried out at the Universidade Federal de Lavras, from October to December 2008 in greenhouse. A randomized block design with five treatments and four repetitions was applied. The treatments, consisting of the five respective evaporation factors; , 0.30 EVm; 0.60 EVm; 0.90 EVm; 1.20 EVm; 1.50 EVm (evaporate depth), were done according to an evaporated depth of a reduced pan. The results showed that: The maximum commercial yield, 36.5 t ha-1, was estimated by applying a 164.8 mm depth, which corresponded to a water reposition factor of 98 %; the highest water usage efficiency (962.45 kg ha-1 mm-1) was attained when an irrigation depth of 50.10 mm (30%) was used.


Keywords


Lactuta sativa L.; Irrigation depths; Greenhouse.



DOI: http://dx.doi.org/10.5433/1679-0359.2012v33n6Supl1p2681

Semina: Ciênc. Agrár.
Londrina - PR
E-ISSN 1679-0359
DOI: 10.5433/1679-0359
E-mail: semina.agrarias@uel.br
Este obra está licenciado com uma Licença Creative Commons Atribuição-NãoComercial 4.0 Internacional