摘要
以辽宁省草河口1968年营建的红松无性系种子园和普通人工林为研究对象,对红松种子园的落花落果规律及其影响因子和人工辅助授粉进行试验研究。经10年的研究结果表明:红松种子园树木年平均自然落花落果率为46.46％,6月下旬至7月上旬是落果的高峰期。人工辅助授粉是提高座果率的有效方法,可提高座果率20％左右。因雄球花密度与座果率相关显著,故在新建种子园时,株行距应以3m×3m为宜。
Common korean pine plantation and korean pine clonal seed orchard established in 1968 in Cao Hekou town of Liaoning province were studied. Authors analysed systematically the laws of cone dropping of korean pine clonal seed orchard and some influence factors and the effect of artificial supplementary pollination. The results showed that the average natural percentage of cone dropping is 46.46％ every year and the peak period of cone dropping from the last ten days of June to the first ten days of July. Artificial supplementary pollination is possible for a stand to increast the percentage of fertile cone by 20％. Compact planting (3m×3m) is recommended because the correlation is significant between the percentage of fertile cone and the density of male flowers.
出处
《东北林业大学学报》
CAS
CSCD
北大核心
1993年第2期8-13,共6页
Journal of Northeast Forestry University
关键词
红松
种子园
座果率
树木
Korean pine seed orchard
Flowers drop
Fruit drop
Supplementary pollination
Percentage of fertile cone
