辽南地区越橘根系分布特征

Characteristics of Root System of Blueberry in South of Liaoning Province

调查了7a生越橘在辽南地区棕壤条件下根系分布特征。结果表明:(1)5个越橘品种根幅为50～70cm,水平分布主要在0～50cm范围内;(2)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1～3mm的根系最大,其次为≤1mm的根系,≥3mm的根系所占比例较小;(3)康维尔、北村和斯卫克的根长密度较大,北陆和美登较小;不同径级根系根长密度占总根长密度的比例≤1mm根系最大,其次为1～3mm的根系,≥3mm的根系所占比例较小;(4)5个越橘品种根系生物量和根长密度垂直分布深度在30～40cm以内,主要分布在0～20cm土层中,其中康维尔和北村集中分布在0～10cm土层中,美登集中分布在10～20cm土层中,北陆和斯卫克在0～20cm土层内分布相对较为均匀。

Root distribution characteristics of five blueberry cultivers in brown soil area were examined. The results showed that（1）root range of 5 blueberry cultivars was 50 to 70 cm,centralized in 0-50 cm, （2）the root biomasses of high-bush blueberry and half high-bush blueberry were high, the root biomass of lowbush blueberry was low,the root biomass of the roots with diameters of 1-3 mm was the highest,diameter 〈1 mm ranked the second, diameter〉3 mm was the lowest; （3）the root length densities of the cultivars of Coville, Northcountry and Brunswick were high, and low for the cultivars of Northland and Blomidon was lesse; the density of the roots with diameter 〈1 mm was the highest,diameter between 1-3 mm ranked second, and diameter〉3 mm was the lowest; （4）the root biomass and root density of 5 blueberry cultivars distributed in 30-40 cm soil layer,mostly in 0-20 cm soil layer, among them, the roots of Coville and Northcountry centralized in 0-10 cm soil layer, in 10-20 cm soil layer for Blomidon,and in 0-20 cm soil layer for Northland and Brunswick with uniform distribution.