The Type of Dormancy and Pre Treatment for Breaking Dormancy of Balsa (Ochroma bicolor ROWLEE) Seed

One of the determinants of the success of germination is when the dormancy inhibiting factor in the seed has been controlled.If the seeds show symptoms of dormancy, then it needs preliminary treatments before being germinated.This study aims to determine the type of dormancy and pre treatment for breaking the dormancy of balsa seeds.The experimental design used was a complete randomized in factorial design.The observed variables were germination capacity (GC), mean days germination (MDG) and germination values (GV).The o o preliminary treatment used included the use of 80 C of hot water, water of 27 C, gibberelic acid (GA ), hydrogen 3 peroxide (H O ), and without treatment (control).The results show that the dormant type of balsa seed is a 2 2 combination of external dormancy (coat hardnesses) and internal dormancy (embryo).The best preliminary treatment was obtained on soaking the seeds in GA3 (75 ppm) for 24 hours.