【摘要】 根据调查,提出了影响油松无性系种子园良种产量的主要因素,即无性系个体间开花结实的差异、球果害虫危害、雌花授粉不良和栽植密度过大等。通过无性系再选择、留优去劣疏伐和截顶等修剪试验,提高了花期温度,改善了通风透光条件,加强了花粉的传播,促进了油松母树开花结实;进行人工辅助授粉和病虫害防治,能够提高座果率和种子品质,减少球果在其生长发育过程中的损失;提出了促进油松种子园种子丰产的综合技术,使良种产量由原来的11.5 kg.hm-2提高到26.0 kg.hm-2。更多还原

【Abstract】 Through many years’ survey and study,factors which affect the seed yield of Pinus tabulaeformis clonal seed orchard were found out,such as difference of flowering and fruiting among individual clones,cone damage by insect,poor pollination of female flowers,poor ventilation and sunlight in seed orchard due to heavy dense stand,etc.Through re-selection of P.tabulaeformis clones,keeping fine and removing inferior trees in thinning, and topping of mother-trees,to increase temperature in flowering period in orchard,improve ventilation and sunlight penetration,help spread of pollens and promote flowering and fruiting of P.tabulaeformis mother-trees.Man-assisting pollination and control of pest and disease could improve fruit set percentage and seed quality and decrease cone loss during its growth and development.This paper also brought forward a set of comprehensive technique for improving seed yield of seed orchard,which could increase the seed yield to 26.0 kg·hm-2 from averaged 11.5 kg·hm-2.更多还原