杉木种子园种子产量和质量的调查分析

Investigation and Analysis on Seed Yield and Quality of Cunninghamia lanceolata Seed Orchard

对龙泉市林科所杉木第1代种子园盛果前期资料的统计分析表明，嫁接后第3—4年开始投产，第8～9年开始进入盛果期，产量一般稳定在75～120kg／hm2；各无性系间平均单株产量差异板显著，而且重复率达到57．96％～70．61％；同一无性系直冠形接株平均单株产量极显著高于盘冠形接株，差距达到3．5倍左右，并且随着树龄增加而扩大，而种子发芽率前者极显著高于后者，涩粒率前者低于后者。因此，选择遗传性优良的高产无性系为建园材料，培养直冠形接株，是种子园达到高产、稳产和优质的关键。

Statistic analysis on the data about the first genertion seed orchard of Cunninghamia lanceolata of Longquan Forestry Institute showed that it began to put into production on the fourth or fifth year after it was grafted and began to be full fruit on the eighth or ninth year. Its yield was 75~120kg/hm2. Mean yield of individual plant had most significant difference among various clones; mean yield and seed germination rate of individral plant with straight crown was significantly higher than those of the plant with coiled crown. Selection for high - yield clone with fine heredity and breeding was key to high and stable-yield of seed orchard.