INFLUÊNCIA DO TEMPO DE ARMAZENAMENTO NO ENRAIZAMENTO DE MINIESTACAS DE CLONES DE Tectona grandis LINN F.

Badilla, Yorleny; Xavier, Aloisio; Gamboa, Olman Murillo

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Articles • Rev. Árvore 41 (3) • 2017 • https://doi.org/10.1590/1806-90882017000300003 copiar

INFLUÊNCIA DO TEMPO DE ARMAZENAMENTO NO ENRAIZAMENTO DE MINIESTACAS DE CLONES DE Tectona grandis LINN F.

Autoria SCIMAGO INSTITUTIONS RANKINGS

RESUMO

Este estudo teve como objetivo avaliar a influência do período entre coleta/preparo e estaqueamento na sobrevivência e enraizamento de miniestacas de clones de Tectona grandis. O delineamento experimental foi em arranjo fatorial (4 x 7), considerando quatro clones (Carapá, Ipê, GU5 e TB7) que são parte do programa de melhoramento genético da empresa Agrícola VerdeNovo, selecionados em Mato Grosso, Brasil. Com sete períodos de tempo (tratamentos) entre a coleta/preparado e o estaqueamento das miniestacas (0, 1, 2, 4, 8, 12 e 16 horas), em delineamento estatístico de blocos ao ocaso, com três repetições e parcelas de 16 miniestacas. Avaliaram-se a sobrevivência e o enraizamento de miniestacas na saída da casa de vegetação (30 dias após estaqueamento) e da casa de sombra (40 dias após estaqueamento), o crescimento em altura e diâmetro do colo, a biomassa da parte aérea e do sistema radicular aos 55 dias após estaqueamento. Os resultados evidenciam que não há influência significativa do intervalo de tempo, entre coleta/preparo e estaqueamento de miniestacas de teca, na sobrevivência e no enraizamento dos quatro clones estudados. Foi constatada a existência de efeito genotípico no enraizamento dos quatro clones avaliados, os quais obtiveram altas percentagens de sobrevivência e de enraizamento na saída da casa de vegetação (93% e 90% respetivamente), assim como sobrevivência na saída da casa de sombra (88,%).

Palavras-Chave:
propagação vegetativa; silvicultura clonal; teca

Table 1 Summary of variance analyses on survival (SCV) and rooting (ENR) after greenhouse period, as well as survival after shadowhouse period (SCS), as a response to storage of minicuttings after harvest/preparation, from four Tectona grandis clones.

Source of	DF	SCV (%)			ENR (%)			SCS (%)
Variation		Mean square	F	P	Mean square	F	P	Mean square	F	P
Clone (C )	3	200.27	4.91	0.0115^** ns , * and *** non significant at 0.05; significative at 0.05; 0.01 and 0.001 probability (P), respectively for the F test.	344.12	5.86	0.0057^*** ns , * and *** non significant at 0.05; significative at 0.05; 0.01 and 0.001 probability (P), respectively for the F test.	321.18	3.91	0.0259^** ns , * and *** non significant at 0.05; significative at 0.05; 0.01 and 0.001 probability (P), respectively for the F test.
Treat. (T)	5	105.25	2.58	0.0554^ns ns , * and *** non significant at 0.05; significative at 0.05; 0.01 and 0.001 probability (P), respectively for the F test.	148.03	2.52	0.0599^ns ns , * and *** non significant at 0.05; significative at 0.05; 0.01 and 0.001 probability (P), respectively for the F test.	117.65	1.43	0.2564^ns ns , * and *** non significant at 0.05; significative at 0.05; 0.01 and 0.001 probability (P), respectively for the F test.
(C) ^* ns , * and *** non significant at 0.05; significative at 0.05; 0.01 and 0.001 probability (P), respectively for the F test. (T)	15	40.76	0.83	0.6582^ns ns , * and *** non significant at 0.05; significative at 0.05; 0.01 and 0.001 probability (P), respectively for the F test.	58.748	0.88	0.5991^ns ns , * and *** non significant at 0.05; significative at 0.05; 0.01 and 0.001 probability (P), respectively for the F test.	82.10	1.45	0.1463^ns ns , * and *** non significant at 0.05; significative at 0.05; 0.01 and 0.001 probability (P), respectively for the F test.
Mean			92.71			90.03			88.09
CV _exp (%)			7.56			9.05			8.53

Table 2 Summary of variance analyses for heigth (h) and collar diameter (dc), as a response function of minicuttings storage after harvest/preparation, from four Tectona grandis clones after 55 days-age.

Source of	DF	h (cm)			dc (mm)
variation		Mean square	F	P	Mean square	F	P
Clone ( C)	3	68.119	21.21	<.0001^** ns, , * and *** non significant at 0.05; significative at 0.05; 0.01 and 0.001 probability (P), respectively for the F test.	0.956	12.31	0.0001^** ns, , * and *** non significant at 0.05; significative at 0.05; 0.01 and 0.001 probability (P), respectively for the F test.
Treat (T)	6	0.658	0.20	0.9707 ^ns ns, , * and *** non significant at 0.05; significative at 0.05; 0.01 and 0.001 probability (P), respectively for the F test.	0.03	0.5	0.8016^ns ns, , * and *** non significant at 0.05; significative at 0.05; 0.01 and 0.001 probability (P), respectively for the F test.
(C )^* ns, , * and *** non significant at 0.05; significative at 0.05; 0.01 and 0.001 probability (P), respectively for the F test. (T)	18	3.210	1.31	0.2196^ns ns, , * and *** non significant at 0.05; significative at 0.05; 0.01 and 0.001 probability (P), respectively for the F test.	0.077	1.15	0.335^ns ns, , * and *** non significant at 0.05; significative at 0.05; 0.01 and 0.001 probability (P), respectively for the F test.
Mean		10.9				3.68
CV (%) exp.		14.36				7.06

Table 3 Summary of variance analyses on biomass (PPA) and root system (PSR), as a response function of minicuttings storage after harvest/preparation, from four Tectona grandis clones after 55 days-age.

Source of	DF	PPA (g)			PSR (g)
variation		Mean square	F	P<0.05	Mean square	F	P
Clone ( C)	3	0.318	6.74	0.0031^** ns, , * and *** non significant at 0.05; significative at 0.05; 0.01 and 0.001 probability (P), respectively for the F test.	0.015	1.43	0.267^ns ns, , * and *** non significant at 0.05; significative at 0.05; 0.01 and 0.001 probability (P), respectively for the F test.
Trat (T)	6	0.085	1.81	0.1531^ns ns, , * and *** non significant at 0.05; significative at 0.05; 0.01 and 0.001 probability (P), respectively for the F test.	0.006	0.63	0.7076^ns ns, , * and *** non significant at 0.05; significative at 0.05; 0.01 and 0.001 probability (P), respectively for the F test.
(C )^* ns, , * and *** non significant at 0.05; significative at 0.05; 0.01 and 0.001 probability (P), respectively for the F test. (T)	18	0.047	1.18	0.3133^ns ns, , * and *** non significant at 0.05; significative at 0.05; 0.01 and 0.001 probability (P), respectively for the F test.	0.01	0.6	0.8835^ns ns, , * and *** non significant at 0.05; significative at 0.05; 0.01 and 0.001 probability (P), respectively for the F test.
Média	1.09				1.04
CV _exp. (%)	18.25				12.73

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