2 research outputs found

    ProduĆ§Ć£o de mudas de tomateiro em substrato orgĆ¢nico inoculado e incubado com estreptomicetos Tomato seedlings grown in organic potting mix inoculated and incubated with streptomycetes

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    Este trabalho teve como objetivo avaliar a inoculaĆ§Ć£o e incubaĆ§Ć£o do substrato PlantmaxĀ® HortaliƧas de produĆ§Ć£o de mudas, com diferentes isolados de estreptomicetos no crescimento de mudas de tomateiro. No primeiro ensaio, avaliou-se a inoculaĆ§Ć£o de quatro isolados de actinomicetos e a testemunha nĆ£o inoculada, sem incubaĆ§Ć£o e com 20 dias de incubaĆ§Ć£o, em esquema fatorial (5 x 2) e delineamento experimental de blocos casualizados, com 15 repetiƧƵes. A inoculaĆ§Ć£o e incubaĆ§Ć£o do substrato com os estreptomicetos promoveram o aumento na altura das plantas, a produĆ§Ć£o de massa seca da parte aĆ©rea e raĆ­zes e o acĆŗmulo de nutrientes na parte aĆ©rea das mudas de tomateiro. No segundo ensaio, avaliou-se a inoculaĆ§Ć£o dos dois melhores estreptomicetos na promoĆ§Ć£o do crescimento das plantas de tomateiro produzidas em substrato orgĆ¢nico incubado por cinco perĆ­odos diferentes (0, 15, 30, 45 e 60 dias), em esquema fatorial 2 x 5 e delineamento inteiramente casualizado, com oito repetiƧƵes. Quarenta e trĆŖs dias foi o melhor perĆ­odo para incubaĆ§Ć£o, provavelmente, por ser o tempo necessĆ”rio para que os estreptomicetos pudessem colonizar e atuar na decomposiĆ§Ć£o do substrato orgĆ¢nico, disponibilizando nutrientes para as raĆ­zes e permitindo o crescimento vegetal.<br>This work had the objective of evaluating the effect of inoculation and incubation of a potting soil with streptomycetes in growth promotion of tomato seedlings. The first experiment was conducted with four streptomycete isolates, with and without incubation for 20 days. The experimental design was entirely randomized with 15 replications, in a factorial squeme (5 x 2). The inoculation and incubation of the potting mix promotted a significant increase in plant height, root and shoot dry weight, and plant nutrient levels. In the second experiment, the inoculation with the two best isolates, in five different incubation periods (0, 15, 30, 45 and 60 days) was evaluated for growth of tomato seedlings in the same potting growth mix, using an entirely randomized experimental design with 8 replications and a factorial scheme 3 x 5. Forty three days was considered to be the best incubation period, suggesting that this may be the time necessary for the streptomycete isolates to colonize and act in the decomposition of the organic matter, improving nutrient uptake by the roots, and promoting plant growth
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