The invention discloses a method for cultivating
heterosis litchi resources by using male sterile litchis, relates to the technical field of
fruit tree cultivation and breeding, and aims to solve the problems of unstable flowering phase overlapping degree of domestic litchi varieties and 'Kom', low
pollination efficiency, low fruit
retention rate and the like. The invention provides a method for cultivating
heterosis litchi resources by using male sterile litchis, which comprises the following steps: selecting 'Kom' as a female parent, respectively
grafting the 'Kom' and an extremely early male parent 'Sanyuhong' to litchi
seedling stocks, unifying the growth environment and
synchronizing the flowering phase. Secondly, compound
fertilizer is applied and leaflets are removed when the spica is extracted, so that the quality of the spica is optimized, and the
pollination efficiency is improved. Then, closed
girdling is conducted on the bases of the fruit bearing branches to protect fruits, nutrients are regulated, fruit dropping is reduced, and it is ensured that the fruits grow to be mature. And finally, collecting mature fruits,
sowing to obtain F1-generation plants, performing
heterosis evaluation, and screening early-maturing and high-quality new varieties.