Pesquisa Agropecuária Tropical (Oct 2010)
PLANT STIMULANT EFFECT ON BRASIL-BAHIA TOBACCO GROWTH AND PRODUCTION EFEITO DE ESTIMULANTE VEGETAL NO CRESCIMENTO E PRODUÇÃO DE FUMO BRASIL-BAHIA
Abstract
<p style="margin-bottom: 0cm; font-style: normal; font-weight: normal; line-height: 120%; text-decoration: none;" lang="pt-BR" align="JUSTIFY"><span style="color: #000000;"><span style="font-family: Times New Roman,serif;"><span style="font-size: small;">The purpose of the study was to evaluate the effect of the Stimulate<sup>®</sup> plant stimulant, applied to leaves by spraying, on tobacco (<em>Nicotiana tabacum</em> L.) growth and production. The Brasil-Bahia tobacco and Stimulate<sup>®</sup>, at the doses of 0.0 mL L<sup>-1</sup> (control - water); 1.0 mL L<sup>-1</sup>; 3.0 mL L<sup>-1</sup>; 5.0 mL L<sup>-1</sup>; and 11.0 mL L<sup>-1</sup>, in watery solution, were used. On the fifteenth day after sowing (DAS), the treatments were applied. A total of six sprayings were made, once a day, each five days. After forty-three DAS, the number of leaves; stem and root length; stem, roots, and leaves dry matter; and leaf area were evaluated, under nursery conditions. In the field, the plants remained for 64 days (107 DAS) and the number of leaves; number of viable leaves; plant height; stem and leaves dry matter; and leaf area were evaluated. Stimulate<sup>®</sup>, under nursery conditions, decreased stem, root and leaf dry matter and leaf area for tobacco. Stimulate<sup>®</sup> was also efficient to increase the number of leaves and stem length, under nursery conditions, for the Brasil-Bahia tobacco. Under field conditions, Stimulate<sup>®</sup>,<sup> </sup>applied during the vegetative stage, was not efficient to increase leaf production, however, it increased stem height and dry matter.</span></span></span></p> <p style="margin-bottom: 0cm; font-style: normal; font-weight: normal; line-height: 120%; text-decoration: none;" lang="pt-BR" align="JUSTIFY"><span style="color: #000000;"><span style="font-family: Times New Roman,serif;"><span style="font-size: small;">KEY-WORDS: <em>Nicotiana tabacum</em> L.; leaf pulverization; plant regulator;<em> </em>Stimulate<sup>®</sup>.</span></span></span></p><p style="margin-bottom: 0cm; font-style: normal; font-weight: normal; line-height: 120%; text-decoration: none;" lang="pt-BR" align="JUSTIFY"><span style="color: #000000;"><span style="font-family: Times New Roman,serif;"><span style="font-size: small;">Objetivou-se avaliar o efeito do estimulante vegetal Stimulate<sup>®</sup>,<sup> </sup>via pulverização foliar, sobre o crescimento e produção de fumo (<em>Nicotiana tabacum</em> L.). Foram utilizados fumo Brasil-Bahia e Stimulate<sup>®</sup>, nas doses 0,0 mL L<sup>-1</sup>; 1,0 mL L<sup>-1</sup>; 3,0 mL L<sup>-1</sup>; 5,0 mL L<sup>-1</sup>; e 11,0 mL L<sup>-1</sup>. A partir de 15 dias após a semeadura (DAS), foram aplicadas um total de seis pulverizações, uma vez por dia, a cada cinco dias. No viveiro convencional, após 43 DAS, avaliou-se o número de folhas; comprimentos da haste e raiz; massa de matéria seca de hastes, folhas e raízes; e área foliar. No campo, as plantas permaneceram por 64 dias (107 DAS) e avaliou-se o número de folhas; número de folhas viáveis; altura da planta; massa de matéria seca de folhas e hastes; e área foliar. No viveiro convencional, o Stimulate<sup>®</sup> diminuiu a massa de matéria seca da haste, raiz e folha e a área foliar do fumo, porém, foi eficiente no aumento do número de folhas e comprimento da haste, para o fumo Brasil-Bahia. No campo, o Stimulate<sup>®</sup> não foi eficiente no aumento da produção de folhas, porém, incrementou a altura e a massa de matéria seca do caule.</span></span></span></p> <p style="margin-bottom: 0cm; font-style: normal; font-weight: normal; line-height: 120%; text-decoration: none;" lang="pt-BR" align="JUSTIFY"><span style="color: #000000;"><span style="font-family: Times New Roman,serif;"><span style="font-size: small;">PALAVRAS-CHAVE: <em>Nicotiana tabacum</em> L.; pulverização foliar; regulador vegetal;<em> </em>Stimulate<sup>®</sup>.</span></span></span></p>
Keywords