Quality seed production in Stylosanthes spp. as affected by varieties, spacing and seed treatments.

摘要

A field experiment was conducted in Maharashtra, India with 24 treatment combinations involving: three varieties (Stylosanthes seabrana 115995 and 70A, and S. hamata); two spacings (30x10 cm and 45x10 cm); four presowing seed treatments (sundrying, scarification, acid treatment and control). Seed yield and quality parameters were significantly influenced by the stylo varieties. Stylosanthes seabrana 70A recorded significantly less number of days to flower initiation, days to 50% flowering as well as significantly high number of seeds per capsule, seed yield/ha. germination percentage and seedling vigour index. Stylosanthes seabrana 115995 recorded significantly higher seed recovery percentage while S. hamata produced significantly higher secondary branches per plant. Seed yield, germination percentage, seedling vigour index and seed recovery percentage were significantly influenced by various spacings. The 30x10 cm spacing resulted in significantly higher seed yield, germination percentage, seedling vigour index and seed recovery percentage. Considering the three factor interaction, significantly highest seed yield was obtained in the treatment combination Stylosanthes seabrana 70A, 30x10 cm spacing and presowing acid treatment of 0.02% sulfuric acid.