Recobrimento de sementes de soja com micronutrientes, fungicida e polímero

Abstract

RESUMO -A técnica do recobrimento de sementes vem sendo utilizada com a finalidade de incorporar produtos fitossanitários, hormônios, micronutrientes, agentes biológicos e polímeros que propiciem um melhor desempenho de sementes e plântulas. O objetivo principal deste trabalho foi avaliar o efeito do recobrimento das sementes de soja cv. BRS 153 na qualidade das sementes e no desempenho das plântulas. O revestimento foi realizado com três doses de micronutrientes (CoMoB): 1, 2 e 4mL por quilo de sementes; um fungicida com mistura de Carbendazim + Thiram (Derosal Plus ® ) e um complexo polímero + corante (Laborsan Red Solid Pam Bril®). As avaliações da qualidade das sementes foram realizadas através do teste de germinação, índice de velocidade de germinação, envelhecimento acelerado, comprimento de plântula e emergência em casa de vegetação submetendo as sementes a um estresse hídrico de uma semana e emergência em campo. A aplicação conjunta de fungicidas, micronutrientes e polímero assegura melhor uniformidade aos tratamentos (aderência, distribuição e coloração) e não prejudica na qualidade e desempenho das sementes de soja até o limite de 2mL de micronutrientes por quilograma de sementes. A dose de micronutriente de 4mL / kg de sementes é fitotóxica.Termos para indexação: Glycine max, revestimento, qualidade fisiológica. SOYBEAN SEED COATING WITH MICRONUTRIENTS, FUNGICIDE AND POLYMERABSTRACT-Seed coating is being used to incorporate pesticides, biological hormones, micronutrients and polymers that provide better performance for seeds, seedlings and plants in advanced stages of the crop. The main objective of this study was to evaluate the effect of soybean seed cv. BRS 153 coating on seed quality and seedling performance. Coating was made with three doses of micronutrients: 1; 2 and 4 mL/kg seeds; one fungicide: Derosal Plus® (Carbendazim + Thiram) and a polymer (Laborsan Red Solid Pam Bril ® + color agent). Evaluations were made in the laboratory, greenhouse and in the field and consisted of standard germination, first count of germination, accelerated ageing, seedling length, emergence and germination speed index in the greenhouse and field emergence; The results allowed the following conclusions: a) coating soybean seeds with micronutrients, fungicide and polymer provide better uniformity (adherence, distribution and coloration) to the seeds. b) soybean seed coating does not affect its quality and performance up to 2mL micronutrient per kg of seed, if a limit of 6mL final liquid mixture per kg is observed; and c) micronutrient dosage of 4mL/kg seed is phytotoxic when seeds are coated.

Effect of drying, pelliculation and storage on the physiological quality of eggplant seeds

“…It should be emphasized, however, that by increasing the fixation of the active products, there may be a toxic effect of products incorporated in these seeds, reducing the germination. Bays et al (2007), evaluating the physiological quality of soybean seeds after fungicide application, micronutrients (CoMoB) and covering with commercial polymer, observed that the highest dose of the micronutrient (4 mL.kg -1 of seeds) is phytotoxic when seeds are coated with fungicide and polymer. Regarding the effect of drying rates in eggplant seeds, it was observed by the results of the emergence (Table 1B and Figure 2), emergence speed index (Table 1C and Figure 3) and germination speed index (Table 1D and Figure 4) tests that in the seeds dried quickly there was the induction of secondary dormancy caused by their exposure to elevated temperatures, and that was overcome after three months of storage.…”

“…However, concerns about the chemicals used allowed the incorporation of a new technique in agronomy that has been widely used by the vegetable seed industry (Medeiros et al, 2006): film coating. This technology is designed primarily to enable the incorporation of other materials such as fungicides, growth regulators and micronutrients (Oliveira et al, 2006), reduce human exposure to toxic chemicals added to the seeds (Taylor et al, 1998), allow easy identification of treated seeds (Ni and Biddle, 2001), contribute for the proper amount of active ingredients to be applied is adhered to the surface of the seeds guaranteeing their performance (Kunkur et al, 2007), in addition to providing seeds with good appearance, color and adhesion (Bays et al, 2007).…”

Qualidade fisiológica e resistência do recobrimento de sementes de milho

“…No Brasil, para as grandes culturas, o recobrimento de sementes ainda é considerado uma nova tecnologia, pois faltam muitas informações técnico-científicas (Bays et al, 2007). A agregação de valor às sementes, utilizando métodos e tecnologias de produção como o recobrimento de sementes, é uma exigência de um mercado cada vez mais competitivo (Medeiros et al, 2004).…”

“…Contudo, vencida a barreira, as plântulas se igualam na velocidade de crescimento, formando mudas uniformes em massa fresca e seca, tanto em condições de laboratório quanto em viveiros de mudas. Bays et al (2007) observaram que o recobrimento de sementes de soja com polímero não afetou a qualidade fisiológica das sementes. Binneck et al (1999), estudando o efeito do recobrimento das sementes sobre a germinação e a emergência de sementes de trevo-branco, concluíram que com o uso de sementes recobertas, podem-se conseguir populações com altas taxas de germinação e emergência de plântulas.…”

Physiological potential of irrigated rice seeds treated with amino acids and under salt stress

“…According to Bays et al (2007), the primary requirement of an increasingly competitive market is to add value to the seeds, using production methods and technologies such as seed treatment. Currently, treatment is used to incorporate materials such as fungicides, micronutrients, pesticides, plant hormones and polymers which improve the performance of seeds and seedlings and even later stages of culture.…”