侧柏产种量及结实规律研究

Study on Seed-generating Amount and Fruit-bearing Law of Platycladus orientalis

对侧柏单株产果量的 1 5年测定结果表明 ,1 0～ 2 4龄的侧柏单株年产果量变幅在1 .1 0～ 2 .6 0 kg之间 ,平均产果量为 2 .1 kg,球果平均出种率 1 2 .85 % ,单株年产干种子 0 .2 7kg。侧柏植株结实有大年和小年 ,间隔期一般为 1～ 2年 ,但株间结实大小年出现的时间并不一致 ,多数植株结实大年则为丰年 ,反之则为欠年。结实量与球果大小及种子千粒质量呈负相关关系 ,结实量越大 ,球果越小 ,种子千粒质量越轻。结实量与植株生长量有一定关系 ,生长好的植株结实较多 。

The measurement results of study on fruit generating amount of Platycladus orientalis for 15 years indicate: for single tree about 10~20 years old, the annual fruit generating amount range is 1.1~2.6 kg, the mean fruit generating amount is 2.1 kg, the average seed generating rate of cone is 12.85%, the annual dry seed generating amount is 0.27 kg. The high yield or low yield existed in fruit bearing law of Platycladus orientalis and has a 1~2 years interval, but is not unanimous among trees. Moreover, the fruit bearing amount has a negative correlation with cone and low seed weights and a direct correlation with growth.