栽培基质对铁皮石斛生长的影响

以松树皮、松树皮混合泥炭土和松树皮混合蔗渣为栽培基质,对铁皮石斛在海南省乐东黎族自治县生长情况进行研究,通过调查不同栽培基质下铁皮石斛茎长、茎粗、分蘖、节数、根数、根长、地上部生物量、地下部生物量、鲜叶产量和鲜条产量差异,筛选出适宜当地种植铁皮石斛的栽培基质。试验显示:松树皮混合泥炭土(体积比为2∶1)能显著促进铁皮石斛茎伸长、节数根数增多,提高生物量,增加鲜条和鲜叶产量,总体情况显著优于其它处理,是适宜铁皮石斛生长的栽培基质。铁皮石斛生物地上生物量与其农艺性状的相关性分析结果表明,根是影响石斛生物量的关键因素,栽培基质主要通过影响根增殖,增加根重,促进地上部茎伸长,提高地上部生物量,增加铁皮石斛产量。以上结果为在海南省乐东黎族自治县种植铁皮石斛提供了参考。

Effects of Culture Substrates on the Growth of Dendrobium officinale

This study was conducted to analyze the growth of Dendrobium officinale Kimura et Migo in culture substrates including pure pine bark,mixture of pine bark and peat soil and mixture of pine bark and bagasse in Ledonglizu Autonomous County,Hainau Province.In order to select and optimize the culture substrates for D.officinale growing in Ledong,stem length,stem diameter,tiller,pitch number,root number,root length,fresh weight of aerial part and root,yield of fresh leaf and fresh stem of D.Officinale in different culture substrates were calculated.The results showed that the matrix which consisted of pine bark and peat soil (volume ratio of 2:1) could significantly enhance the elongation of stem and root,increase the number of stem and root,improve biomass and yield,and was suitable for the growth of D.officinale.The overall growth of D.officinale was remarkably better than the other two treatments.The results of correlation analysis between fresh weight of aerial part and agronomic traits indicated that root was the most important factors of fresh weight of aerial parts.Culture substrates could increase root weight,enhance the elongation of stem,improve biomass and yield of D.officinale.The results would provide a reference for D.officinale growing in Ledonglizu Autonomous County of Hainan Province.