摘要
提高油松种子园的种子产量，关键在于减少球果败育和提高球果出籽率。本文的研究结果表明：球果败育与种子园的花粉产量无关；不同无性系球果败育率存在显著和极显著差异；树冠上部的球果败育率显著低于树冠下部；在种子园开花初期，辅助授粉能显著提高球果出籽率。１９８８年卢氏种子园实施辅助授粉后，使球果出籽率提高１．１４％，增产效益３３．９％。辅助授粉对不同无性系提高球果出籽率的作用差异明显。
The key to raise seed production lies in the reduction of cone abortion and the enhancement of
seed/clone ratio To find out the laws of cone abortion and means of reduc-tion of cone abortion,
cone development process were observed from 1986 to 1990 in Lushi and from 1987 to 1989 in
Heilihe seed orchards Results showed that there was no relation be-tween cone aborftion and
pollen density.Cone aborftion ratio varied greatly among different strata in tree crown and
among diffrent clones,cone abortion ratio in upper strata of crown is less than that in lower
strata. Moreover,relation between nutition and cone abortion was dis-cussed. In early seed
setting perio,seed/cone ratio could be raised by 1.14% by means of supplementary pollination,
production gain was 33.9%。
关键词
油松
种子园
球果败育
辅助授粉
出籽率
Chinese pine seed orchard
cone
abortion
supplementary pollination
filled seed ratio
produced seed ratio
