Abstract: The comparative experiment was conducted on the growth and leaf nutrients of aboveground and underground small polytube-raised buddings, taking nursery substrates from different ratio of sphagnum peat and coconut bran, and combining with rubber small polytube-raised buddings device and suspension culture method, so as to select and screen the simplified substrates for rubber seedling culture. The results showed that substrate with 1 ∶1 ratio of sphagnum peat and coconut bran had higher nutrient content, more accumulation of seedlings aboveground biomass, and higher out nursery rate. Due to the limitation of container space, there was no obvious effect of nursery substrate with different ratio on the growth of underground rubber small polytube-raised buddings. The mixed sphagnum peat and coconut bran substrate had no significant effect on the leaf blade nutrient of rubber small polytube-raised buddings. Comprehensively considering the above factors, the paper suggested to select 1∶1 ratio of sphagnum peat and coconut bran as nursery substrates for rubber small polytube-raised buddings. The ratio could also be mixed according to the actual cost of production.

Key words: different substrate, rubber tree, small polytube-raised buddings, aboveground part, underground part, leaf nutrient

摘要： 采用不同配比的水藓泥炭与椰糠为育苗基质，结合橡胶树小筒苗的育苗装置及悬空培养方法开展了籽苗芽接小筒苗地上、地下部分的生长量及叶片养分的比较试验，以期筛选出轻简化的橡胶树小筒苗培育基质。结果表明：水藓泥炭与椰糠比例为1∶1时基质速效养分较高，苗木地上部分的生长量及生物量积累较多，出圃率较高；由于受育苗容器空间的限制，不同配比的育苗基质对橡胶树小筒苗地下部分的生长量影响不明显；水藓泥炭与椰糠混配的基质对橡胶树小筒苗的叶片养分影响不显著。综合考虑不同基质对橡胶树籽苗芽接小筒苗各方面生长的影响，建议优选水藓泥炭与椰糠按1∶1混配为橡胶树籽苗芽接小筒苗的育苗基质，也可根据生产成本进行不同调配。

关键词: 不同基质, 橡胶树, 小筒苗, 地上部分, 地下部分, 叶片养分