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Santos, Leandro dos; Macedo, Willian R
Horticultura brasileira, 2024, Volume: 42Magazine Article, Journal Article
ABSTRACT Biostimulants are chemical or biological components adopted to improve nutrient uptake/efficiency and tolerance to abiotic stresses in crops. We studied three biostimulants (Stimulate®, tryptophol and Bacillus subtilis C-3102) associated to two sanitizers (sodium hypochlorite or thymol), on initial growth of propagules of Arracacia xanthorrhiza. Sodium hypochlorite associated to B. subtilis improve the leaf gas exchange, furthermore this treatment showed greater root volume. The interaction among sodium hypochlorite and tryptophol improves the plant branching; in addition this association showed better results for root dry mass. Different biostimulants improve differently the arracacha organs development, hence it is necessary to evaluate the plant morphophysiological competence to apply the correct biostimulant and sanitizer. RESUMO Bioestimulantes são produtos químicos ou biológicos que melhoram a absorção ou eficiência dos nutrientes e a tolerância contra estresses abióticos em cultivos. Foram estudados três bioestimulantes (Stimulate®, tryptofol e Bacillus subtilis C-3102) e dois sanitizantes (hipocloclorito de sódio ou timol), sobre o crescimento inicial de Arracacia xanthorrhiza. Hipoclorito de sódio associado ao B. subtilis melhoram as trocas gasosas e induzem maior volume de raiz. A interação entre hipoclorito de sódio e triptofol aprimorou a ramificação das hastes e a biomassa seca das raízes. Diferentes bioestimulantes agem diferentemente sobre o desenvolvimento dos órgãos de batata baroa; portanto é necessário avaliar a competência morfofisiológica da planta para aplicar o bioestimulante e sanitizante correto.
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