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Lettuce crop fertilized with organomineral source of phosphorus and micronutrients

ABSTRACT The use of organomineral fertilizers (OF) in the cultivation of vegetables has been considered a promising technology to provide nutrients gradually. The OFs can reduce the phosphorous (P) soil adsorption and leaching of nitrogen and potassium with the supply of some micronutrients. This st...

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Published in:Horticultura brasileira 2022-12, Vol.40 (4), p.393-402
Main Authors: Torres, José Luiz R, Silva, Guilherme G da, Charlo, Hamilton César de O, Loss, Arcângelo, Lemes, Ernane M, Vieira, Dinamar Márcia da S
Format: Magazinearticle
Language:English
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Summary:ABSTRACT The use of organomineral fertilizers (OF) in the cultivation of vegetables has been considered a promising technology to provide nutrients gradually. The OFs can reduce the phosphorous (P) soil adsorption and leaching of nitrogen and potassium with the supply of some micronutrients. This study aimed to evaluate doses of OF as a source of P and micronutrients (boron and zinc) for curly lettuce cultivation. Five OF doses were evaluated: T1 = 0% (no P2O5 fertilization); T2 = 50% (75 mg/dm3 of P2O5); T3 = 100% (150 mg/dm3 of P2O5); T4 = 150% (225 mg/dm3 of P2O5); T5 = 200% (300 mg/dm3 of P2O5) of the lettuce recommended fertilization; T6 = 100% mineral fertilizer (MF) (150 mg/dm3 of P2O5). The fresh (FM) and dry mass (DM) of the lettuce shoot (aerial part), the soil nutrient level, and the plant nutritional status at harvest were evaluated. We observed that (i) the doses of 225 and 300 mg/dm3 of P2O5 via OF provided the same availability of P in the soil as the dose of 150 mg/dm3 of P2O5 of MF; (ii) the doses of 225 and 300 mg/dm3 of P2O5 of OF provided higher levels of soil boron and zinc compared to other treatments and (iii) the MF fertilization was more efficient than that of OF in the production of curly lettuce in a protected environment. RESUMO A utilização dos fertilizantes organominerais no cultivo das hortaliças vem sendo considerada como uma das tecnologias promissoras para fornecer nutrientes de forma lenta e gradual, diminuindo os problemas com adsorção de fósforo e lixiviação de nitrogênio e potássio, com fornecimento de alguns micronutrientes. Neste estudo objetivou-se avaliar o uso de diferentes doses de fertilizante organomineral (FO) como fonte fósforo (P) e micronutrientes no cultivo da alface crespa. No delineamento de blocos ao acaso, foram avaliadas cinco doses de FO: T1 = 0,0% (sem adubação com P2O5); T2 = 50% (75 mg/dm3 de P2O5); T3 = 100% (150 mg/dm3 de P2O5); T4 = 150% (225 mg/dm3 de P2O5); T5 = 200% (300 mg/dm3 de P2O5) da dose recomendada para a cultura, mais um tratamento adicional: T6 = adubação 100% fertilizante mineral (FM) (150 mg/dm3 de P2O5), todos com 4 repetições. Avaliou-se a matéria fresca (MF) e seca (MS) da parte aérea das plantas de alface, o teor de nutrientes no solo e o estado nutricional na planta no momento da colheita. Observou-se que as doses de 225 e 300 mg/dm3 de P2O5 via FO proporcionaram a mesma disponibilidade de P no solo que a dose de 150 mg/dm3 de P2O5 de FM; as doses de 225 e 300 mg/dm3 de P2O5
ISSN:0102-0536
1806-9991
DOI:10.1590/s0102-0536-20220407