Seedling emergence inSchizolobium amazonicumHuber ex Ducke (Caesalpinaceae) in different substrates and shading

Abstract

Emergência de plântulas deABSTRACT -Schizolobium amazonicum is a specie from Amazonian forest intensively used in reforestation programs, both because it is fast growing and for good behavior in homogeneous planting. The objective was to evaluate the influence of substrates and shading on emergency and development of parica seedlings. The experimental design was completely randomized with four replications in a factorial 2 x 10 (shading and substrates). The substrates used were commercial coir and composted soil, mixed with alternative materials rice hulls, sand, sawdust and fresh sawdust tanned. Were evaluated seedlings emergence, speed of emergence index, length of roots and hypocotyl, dry matter of roots and hypocotyls, relative frequency and average time of emergency. Sand and dust tanned mountain in mixture (1:1 v / v) with coconut shell or topsoil can be used for Schizolobium amazonicum seedlings formation. Sand and fresh mountain powder can be used in the initial nursery, but seedlings should be transplanted to another substrate or field after 40 days. Rice husk in nature should not be adopted either as a substrate, neat or in mixture. Production of parica seedlings does not require shading.

Evaluation of Substrates for Jenipapo (Genipa americana L.) Seedlings Production

“…Due to the lack of ideal humidity and oxygenation conditions, treatments T1 (fertilized soil), T3 (fertilized soil + sand), and T6 (bovine manure + sand) did not perform their maximum germination potential (Table 2). Substrates composed of pure coconut fiber and coconut fiber mixed with sand resulted in higher emergence rates in paricá seeds (Schizolobium amazonicum Huber ex Ducke) (Gondin et al, 2015). In uvaia seeds (Eugenia pyriformis), percentage of emergence and emergence speed index (ESI) were higher in seeds cultivated in substrates containing organic compounds (Scalon & Jeromine, 2013).…”

“…Despite being poor in organic matter, sand may be advantageous for providing rapid seedlings emergence and root development (Gondin et al, 2015).…”

CRESCIMENTO E DESENVOLVIMENTO DE MUDAS DE Schizolobium amazonicum Huber ex Ducke EM DIFERENTES SUBSTRATOS E RECIPIENTES

“…Os efeitos causados sobre as variáveis estudadas nas plantas de Schizolobium amazonicum foram submetidos a análise de variância e as medias foram comparadas pelo teste de Tukey ao nível de 5% de probabilidade, utilizando o software Assitat 7.7 beta (SILVA, 2015).…”

“…É importante identificar os produtos encontrados nas diferentes regiões do país e torná-los disponíveis como substratos, reduzindo assim os custos de produção, o que eleva a magnitude em desenvolver substratos de fácil aquisição e utilização (GONDIN et al, 2015). Segundo PEREIRA et al, (2010) o recipiente escolhido traz efeitos de ordem técnica e econômica, sendo considerados os ideais aqueles que harmonizam o custo de produção.…”

COMPORTAMENTO DE Myracrodruon urundeuva Allemao EM SUBSTRATOS ALTERNATIVOS

“…Isso mostra a relevância de se caracterizar os produtos encontrados em várias regiões e fazer destes, substratos viáveis, reduzindo assim os custos de produção, o que prioriza o aprimoramento de substratos alternativos de fácil aquisição e utilização (GONDIN et al, 2015).…”