GERMINATION AND DEVELOPMENT OF AMERICAN LETTUCE SEEDLINGS (Lactuca sativa L.) IRRIGATED WITH HOME AND INDUSTRIAL EFFLUENT-RECEIVING WATER
DOI:
https://doi.org/10.15809/irriga.2004v9n3p207-216Abstract
GERMINATION AND DEVELOPMENT OF AMERICAN LETTUCE SEEDLINGS (Lactuca sativa L.) IRRIGATED WITH HOME AND INDUSTRIAL EFFLUENT-RECEIVING WATER
Guilherme Augusto Biscaro1; Rodrigo de Menezes Trigueiro2; Raimundo Leite Cruz2; Marcelo Domingos Chamma Lopes2
State University of Mato Grosso do Sul, Cassilândia, MS, (Brazil), gbiscaro@uems.br
Rural Engineering Department, Agronomic Science College,Paulista State University , Botucatu-SP (Brazil).
1 ABSTRACT
This work has evaluated germination and formation of American lettuce seedlings (Lactuca sativa L.) “Tainá” variety, irrigated with urban effluent-receiving water from Lavapés Creek, a water body which receives all home and industrial sewage of the city of Botucatu, SP (Brazil). The sowing was carried out in 12 plastic foam trays with 32 germination cells each. At 41 days after planting (41-DAP), the seed germination percentage, seedling final size, final number of leaves, the mass of shoot and root dry matter were evaluated. Also, two sorts of substrates were investigated: Multiplantâ and Plug Mixâ. No complementary fertilization was done, so the only available nutrients were the ones originally present in the substrates and in the creek water. For compararison an evaluation was performed using a source of treated water instead of the creek water. Results pointed out that all sown seeds presented 100% of germination. Treatments with Multiplantâ presented the greatest values for plant height. Treatments irrigated with Lavapés Creek water presented a greater number of leaves at 41-DAP.
KEYWORDS: Seedling germination, Lactuca sativa L., effluent receiving water.
BISCARO, G. A.; TRIGUEIRO, R. M.; CRUZ, R. L.; LOPES, M. D. C. GERMINAÇÃO E DESENVOLVIMENTO DE MUDAS DE ALFACE AMERICANA (Lactuca sativa L.) IRRIGADOS COM ÁGUAS RECEPTORAS DE EFLUENTES DOMÉSTICOS E INDUSTRIAIS
2 RESUMO
O trabalho avaliou a germinação e a formação de mudas de alface americana (Lactuca sativa L.) variedade “Tainá”, irrigada com águas receptoras de efluentes urbanos do Ribeirão Lavapés, curso d’água que recebe todo o esgoto doméstico e industrial da cidade de Botucatu – SP (Brasil). A semeadura foi realizada em 12 bandejas de isopor com 32 células de germinação cada. Foram analisados com 41 dias após o plantio (41-DAP), a porcentagem de germinação das sementes, o tamanho final das mudas, o número final de folhas, a massa de matéria seca da parte aérea e de raízes. Também foram estudados dois tipos de substrato: Multiplantâ e Plug Mixâ. Não foi utilizada nenhuma adubação complementar, estando disponível apenas os nutrientes presentes originalmente nos substratos e na água do ribeirão. Para efeito comparativo, realizou-se a mesma avaliação utilizando uma fonte de água tratada. Os resultados indicaram que todas as células semeadas apresentaram 100% de germinação. Os tratamentos que utilizaram o Multiplantâ apresentaram maiores valores de altura de plantas e os irrigados com a água do Ribeirão Lavapés, apresentaram maior número de folhas com 41-DAP.
UNITERMOS: Germinação de mudas, Lactuca sativa L., águas receptoras de efluentes.
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