三种类型越橘根系垂直分布特征研究

调查了7 a生北高丛越橘、半高丛越橘、矮丛越橘在辽南地区棕壤条件下根系垂直分布特征。结果表明:根系生物量以高丛越橘、半高丛越橘较大,矮丛越橘较小;不同径级根系生物量占总生物量的比例以1～3 mm的根系最大,其次为≤1 mm的根系,大于3 mm的根系所占比例较小;根长密度以北村、斯卫克、康维尔较大,北陆、美登较小;不同径级根系根长密度占总根长密度的比例以≤1 mm根系最大,其次为1～3 mm的根系,大于3 mm的根系所占比例较小;5个越橘品种根系生物量和根长密度垂直分布深度在30～40 cm以内,主要分布在0～20 cm土层中,其中康维尔和北村集中分布在0～10 cm土层中,美登集中分布在10～20 cm土层中,北陆和斯卫克在0～20 cm土层内分布相对较为均匀。

Distribution Characteristics of Root System of Three Kinds of Blueberry

This article studied the root vertical distribution of high-bush blueberry,half high-bush blueberry and low-bush blueberry in brown soil area.The results showed that the root biomass of high-bush blueberry and half high-bush blueberry was larger,the root biomass of low-bush blueberry was lesser,the root biomass of diameter 1～3 mm was biggest,diameter<1 mm ranked secondly,root biomass of diameter>3 mm was lesser;the root length density and root count density of length density and root count density of diameter3 mm was lesser;the root biomass and root density of 5 blueberry cultivars was distributed in 30～40 cm soil layer,was mainly distributed in 0～20 cm soil layer,among them,the root of Coville and Northcountry centralize in 0～10 cm soil layer,the root of Blomidon centralize was distributed in 10～20 cm soil layer,the root of Northland and Brunswick uniformly was distributed in 0～20 cm soil layer.