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- Title
Use of reduced Bokashi doses is similar to NPK fertilization in iceberg lettuce production.
- Authors
Pezzoto de Lima, Danilo; Fregonezi, Gustavo Adolfo de Freitas; Hata, Fernando Teruhiko; Ursi Ventura, Maurício; Vilela de Resende, Juliano Tadeu; Wanderley, Christina da Silva; Figueiredo, Alex
- Abstract
The aim of the study was to compare horticultural variables of iceberg lettuce using two Bokashi compost doses, alone and in combination, with the bioactivator Penergetic (Penergetic International AG®) against standard mineral fertilization (NPK) in three crop cycles. Experiments were conducted in a plastic greenhouse at the Universidade Estadual de Londrina, Brazil (548 m a.s.l.). The treatments were: negative control (water only); positive control (NPK, 4-14-8); Penergetic alone; Bokashi doses 5 g and 10 g/plant with or without a combination with Penergetic. Lettuce plants were grown in pots filled with soil. Commercial biomass (CM), head diameter (HD), plant height (PH) and chlorophyll index (CI) were evaluated. In the three cycles tested, the Bokashi 10 g/plant, Bokashi 10 g/plant + Penergetic, and NPK treatments surpassed the control. The studied variables (CM, HD, PH and CI) in the lower Bokashi dose treatment were also higher than controls but lower than higher Bokashi doses and NPK. Penergetic increased the CM in the lower Bokashi dose treatment just in the first production cycle, probably due to the poor organic matter content in the soil. The treatment Bokashi 10 g/plant improved significantly the lettuce horticultural variables vs. control treatments and was similar to chemical fertilization in two of three crop cycles.
- Subjects
LETTUCE; ORGANIC fertilizers; GREENHOUSES; CHLOROPHYLL; BIOMASS energy
- Publication
Agronomía Colombiana, 2022, Vol 40, Issue 2, p293
- ISSN
0120-9965
- Publication type
Article
- DOI
10.15446/agron.colomb.v40n2.102900