浙西北杉木种子园花期和球花量观察分析

The Observation and Analysis of Anthesis and Strobiles Quantity of Chinese Fir Seed Orchard in North-West Zhejiang Province

In this paper, the effect of clone provenance, clone and sunlight condition on anthesis and quantity of strobiles was analysed. It shows that through two years' observation: the average number of male cone/per 1 year branch in full sunshine plots is about 1.7~2.3 times of those in sunlight-deficient plots and the ratio of female cone about 3~9 times. Under the same sunlight condition, the strobile number/per branch of clones which come from the Central part of distribution area is obviously less than that of the clones from South or North part. The difference for male cone number is about 40% and for female cone number is about 100 %. In the year of cool and rainy March, the anthesis of the earliest flowering clones is 12~15 days earlier than the latest flowering ones. The earliest anthesis clones mainly come from South part of the distribution area but there are also some from Central even North part; The latest anthesis ones mainly from North part but there are also some from Central or South part. Lasting fine and warm weather can make the anthesis appear earlier and shorten its duration, especially for microstrobilus.