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      Use of reduced Bokashi doses is similar to NPK fertilization in iceberg lettuce production Translated title: El uso de dosis reducidas de Bocashi es similar a la fertilización NPK en la producción de lechuga iceberg


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          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.

          Translated abstract

          RESUMEN El objetivo de este trabajo fue comparar las variables hortícolas de la lechuga iceberg utilizando dos dosis de compost Bokashi, solo y en combinación, con el bioactivador Penergetic (Penergetic International AG®) frente a la fertilización mineral estándar (NPK) en tres ciclos de cultivo. Los experimentos se realizaron en un invernadero de plástico en la Universidade Estadual de Londrina, Brasil (548 msnm). Los tratamientos fueron: control negativo (agua solamente); control positivo (NPK, 4-14-8); Penergetic solo; Bokashi en dosis de 5 y 10 g/planta con o sin combinación con Penergetic. Las plantas de lechuga se cultivaron en macetas llenas de tierra. Se evaluaron biomasa comercial (BC), diámetro de cabeza (DC), altura de planta (AP) e índice de clorofila (IC). En los tres ciclos evaluados, los tratamientos Bokashi 10 g/planta, Bokashi 10 g/planta + Penergetic y NPK superaron al testigo. En general, las variables estudiadas (BC, DC, AP y CI) en el tratamiento de menor dosis de Bokashi también fueron más altas que el control pero menores que con la dosis más alta de Bokashi y NPK. Penergetic aumentó la BC en el tratamiento con dosis más bajas de Bokashi solo en el primer ciclo de producción, probablemente debido al bajo contenido de materia orgánica en el suelo. El tratamiento Bokashi 10 g/planta mejoró significativamente las variables hortícolas de la lechuga frente al tratamiento de control y fue similar a la fertilización química en dos de los tres ciclos de cultivo.

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          Most cited references26

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          Microbial producers of plant growth stimulators and their practical use: A review

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            Cucumber performance is improved by inoculation with plant growth-promoting microorganisms

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              Synergistic effects of organic fertilizer and corn straw on microorganisms of pepper continuous cropping soil in China

              Because of the large population, large demand, limited arable land and many environmental factors, continuous cropping have become a very common phenomenon in China. However, long-term continuous cropping has caused a series of serious soil-borne diseases, and the yield and quality of crops to drop, which seriously restricted the sustainable development of agricultural industry. Therefore, in order to improve the yield of pepper and reduce the occurrence of soil-borne diseases, it is essential to understand the effect of continuous cropping of pepper on soil microbial community composition and abundance. In this study, high throughput sequencing was used to study the effects of seven treatments of organic fertilizers and corn straw on soil microbial community and function of pepper continuous cropping. The results showed that the yield of all treatments was significantly higher than that of the control. The soil microbial diversity and community composition showed that Proteobacteria and Ascomycota were the most abundant phylum in all treatments. In conclusion, there were significant differences among the seven treatments and the treatment of fowl dung with corn straw was the best fertilizer combination to improve the yield and output value of pepper. Besides, the addition of fowl dung and corn straw not only can improve the community and functions of microorganisms, but also enhance the ability of disease resistance, and ultimately decrease the soil-borne diseases. The results will help to provide scientific basis for rational application of organic fertilizer and corn straw, and overcoming continuous cropping obstacles.

                Author and article information

                Agronomía Colombiana
                Agron. colomb.
                Universidad Nacional de Colombia, Facultad de Agronomía (Bogotá, Distrito Capital, Colombia )
                August 2022
                : 40
                : 2
                : 293-299
                [3] Maringá Paraná orgnameUniversidade Estadual de Maringá orgdiv1Agronomy Department Brazil
                [2] Londrina Paraná orgnameCentro Universitário Filadélfia orgdiv1Agronomy Department Brazil
                [1] Londrina Paraná orgnameUniversidade Estadual de Londrina orgdiv1Agronomy Department Brazil
                S0120-99652022000200293 S0120-9965(22)04000200293

                This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

                : 27 May 2022
                : 31 August 2022
                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 28, Pages: 7

                SciELO Colombia


                fertilizante químico,Lactuca sativa,abono orgánico,Penergetic,chemical fertilizer,organic fertilizer


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