L.L. Ferreira, W.F.C. Silva, I.R. Carvalho, G.G. Conte, V.T. Pereira, M.S. Fernandes, J.A.G. Da Silva, D.A. Magano
Published: April 30, 2020
Genet. Mol. Res. 19(2): GMR18424
DOI: https://doi.org/10.4238/gmr18424

Cite this Article:
L.L. Ferreira, W.F.C. Silva, I.R. Carvalho, G.G. Conte, V.T. Pereira, M.S. Fernandes, J.A.G. Da Silva, D.A. Magano (2020). Yield components of lettuce cultivars submitted to different phosphate sources. Genet. Mol. Res. 19(2): GMR18424. https://doi.org/10.4238/gmr18424

About the Authors
L.L. Ferreira, W.F.C. Silva, I.R. Carvalho, G.G. Conte, V.T. Pereira, M.S. Fernandes, J.A.G. Da Silva, D.A. Magano

Corresponding Author
I.R. Carvalho
Email: irc.carvalho@gmail.com

ABSTRACT

There is little information available concerning the effects of different sources and levels of phosphorus in the soil on lettuce quality and production. To help determine an optimal strategy, we used complete randomized blocks, in a 2x3x5 factorial experimental design, with two commercial lettuce cultivars widely used in Brazil (Americana (iceberg lettuce) cv. Lucy Brown and Crespa (leafy lettuce) cv. Vanda) fertilized with one of  three phosphate sources [MAP, Polyblen or Triple Super Phosphate (SPT)], at five concentrations (0, 250, 500, 750 or 1000 kg of P₂O₅ ha^-1), with three replicates planted on a farm in Mineiros, GO. The variables stem height, head diameter, number of commercial and non-commercial heads and commercial fresh weight, were analyzed at 40 days after planting. There was a triple interaction for these factors, when their averages were broken down to qualitative and quantitative effects. The variables were correlated, and affinities with the genotype x phosphate source interaction were found. Based on the yield data, the recommendations for Americana are 911, 680 or 457 kg P₂O₅ ha^-1 from MAP, Polyblen, and SPT, respectively. For Crespa the recommendations are 580 or 611 kg P₂O₅ ha^-1 from MAP and SPT, respectively.

Keywords: Lactuca sativa, Phosphorus, Plant nutrition.