在分根系统中，白羽扇豆的排根占根系干重的比例在局部供磷（羟基磷灰石）的土层中大量增加。

The percentage of root biomass allocated to cluster roots increased in the soil layer supplemented with P in a split-root system.

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用游动孢子接种参根，地上部产生典型症状只占发病参根的2.5%。

The typical symptom above ground had only 2.5 percent of diseased Ginsenginoculated them with Zoospores.

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施肥频率对根密度的影响主要是引起各土层根密度大小的变化，运行方式则对各土层根长占整个剖面根长总和的比例产生影响。

Root length density varied with fertigation frequencies, and the ratio of root length for different soil layers to the total root length in the profile varied with fertigation strategies.

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