基质配比对南方红豆杉容器苗及其移栽生长的影响

2005-2006年,在浙江省淳安县,设计4种轻型、半轻型的配比基质,进行基质配比对南方红豆杉Taxus chinensis var.mairei容器苗生长、根系发育、干物质积累和分配的影响,以及对基质容器苗与大田裸根苗出圃质量和栽植当年生长差异的研究。结果表明,与大田裸根苗比较,容器苗出圃质量显著提高,苗高和地径生长量大,分枝数多,各器官和总干物质积累量高,根系发达,须根大量增生,根茎比大幅增高。在4种配比基质处理中,以泥炭为主的配比基质(占配比基质的39%~49%)容器苗生长量大,出圃质量高。容器苗不仅出圃质量较大田裸根苗高,而且移栽当年的树高和地径生长量大,分枝数多,有利于南方红豆杉短周期药用林的高产栽培。表6参10

Growth of Taxus chinensis var. mairei for container seedlings in different media mixtures and for bare-root versus container seedlings in a young stand

Media mixtures to determine the best growth,root development,and dry matter accumulation and allocation in container seedlings of Taxus chinensis var.mairei(Maire Yew) were tested,and quality and growth of container and bareroot seedling in the same year of being planted out were compared.In 2005-2006 at Chun' an County,Zhejiang Province,four 1ight and half-light(the medium' s volume weight is light) medium mixtures(20%-49% peat,0-25% fermented sawdust,20$% loess,0-20 % coke plaster and 0-1% calcium-magnesium phosphate fertilizer) were tested with three replications;the container and bare-root comparison design with two replications was established.Results showed that compared to bare-root seedlings,container seedlings with all the four medium mixture improved seedling quality: taller height,larger diameter of basal stem,more branches,and more accumulation of organs and total dry matter,more developed fibrous roots,and higher root-shoot ratio.The container seedlings grown in the media of peat(39%-49%) had greater growth and better quality.After planting,container seedlings promoted the growth of tree height,root collar diameter,and branch number.Thus,the container seedlings were beneficial for high-yield cultivation of a short-rotation,medicinal plantation of T.chinensis var.mairei.