Efecto de dos tratamientos pregerminativos con tres sustratos en la propagación de Ochroma pyramidale (Cav. ex Lam.) Urb. (BALSA) en un vivero de Huamboya.

Abstract

This study was carried out with the aim of evaluating the effect of two pre-germinative treatments with three substrates in the propagation of Ochroma pyramidale (cav. ex lam.) urb. (Balsa) in a nursery of Huamboya. A randomized complete block design with factorial structure was developed, the factors are the substrates with three levels (S1, S2 and S3) and the pre-germinative treatments with three levels (Ta, Tb and Tc), the trial consisted of 7 subsamples and 45 experimental units, the variables to be determined are germination at 15 days, diameter at the height of the neck, height and number of leaves at 30, 45 and 60 days, for seed germination, two pre-germination treatments Ta, Tb and Tc were applied, ANOVA was applied for the variables that met the assumptions and Friendman for those that did not, and the economic estimation was made using the partial budget proposed by PERRIN. The best pre-germinative treatment is Ta (immersion of seeds in hot water for 24 hours) with 86.66% germination; at the height of the neck its best substrate S1 (black soil (40%) + sand (30%) + coffee husk (30%)) with 5.5mm; In height, an average of 25.07cm was obtained in substrate S1 (black soil (40%) + sand (30%) + coffee husk (30%)); the number of leaves T1 (TaS1) obtained an average of 8.03 as the best treatment; in the costs per treatment 100% black soil is $16.78 for T3 and $16.48 for T6, that is $0.16 per seedling. It was concluded that the interaction in T1 (TaS1) presented high values in the development of raft, it is recommended to use hot water as a pre-germinative treatment and to incorporate coffee husk and black soil in different portions for substrates.