种植深度对栓皮栎种子萌发及幼苗生长发育的影响

Influence of Seeding Depth on Germination and Seedling Development of Acorn(Quercus variabilis)

为了了解林木种子直播过程中,播种深度对林木种子出苗率及幼苗生长发育的影响,在济源王屋山地区次生栓皮栎林内,设置4 cm和12 cm两种播种深度,种植100枚健康栓皮栎种子,定期观察记录其发芽和成长状况。结果显示:①4 cm条件下,栓皮栎的发芽率为92%,而12 cm条件下,发芽率仅为62%,二者差异显著;②在2种种植深度下,栓皮栎幼苗的地上茎长度分别为11.79±0.55 cm和11.41±0.65 cm,差异不显著,而叶片数分别为10.33±0.68和9.54±1.13,亦无显著差异。由此可见,在一定范围内,种植深度对林木种子的发芽和出苗率有直接影响,但对出苗后幼苗的生长发育并无明显影响。

In order to investigate the influence of seeding depth on germination and seedling development, we sowed 100 acorns in flower pots which were half buried under ground in secondary forest of Quereus variabilis, which the seeding depth included 4 cm （50 acorns） and 12 cm （50 acorns）, and the emergence of seedlings and their development was recorded timely. Our results shown that 1） the rate of emergence was 92% in 4 cm seeding depth, while it was only 62% in 12 cm seeding depth; 2） the length of stem was 11.79 ± 0.55 cm （ in 4 cm depth） and 11.41 ± 0.65 cm （in 12 cm depth）, and the total number of leaf was separately 10.33 ± 0.68 and 9.54 ± 1.13 in 4 cm and 12 cm seeding depth. So we concluded that the seeding depth would produce a great influence on rate of seedling emergence, but it was not remarkably related to development of seedling.