对由胚珠败育和空粒引起油松种子园减产的分析

通过对油松种子园、人工林、母树林的球果分析、产量调查和花粉密度观测,讨论了胚珠败育、空粒等对种子产量的影响;结合花粉产量、植株着毛特性,对败育和空粒作了分析,并从花粉管理角度对提高种子园产量作了探讨。

Studies on Increasing Seed Production in Seed Orchards of Pinus tabulaeformis Carr.——An analysis of seed losses caused byarborted ovules and emptied seeds

Investigations on cone crop and seed yield of two seed orchards and two plantations as well as the pollen production of the seed orchards were carried out from 1984-1987. The heavy losses of seed production of both orchards caused by the first and the second years arborted ovules and emptyed seeds were discussed in relation to pollen production, flowering characteristics of clones and the positions of tree crowns. The corresponding measures, such as supplemental mass pollination, protection from pests and fertilization of soil should be taken into consideration.