以番茄品种东农708 为试验材料，取距地表0～15 cm，15～30 cm，30～45 cm 的土壤为栽培土壤，各层土壤以施N、P、K 肥为供磷处理，以施N、K 肥为对照，研究不同土层深度及供磷水平对番茄生物量及根系形态的影响。结果表明，番茄植株地上部生物量受施磷水平和土层深度共同影响，同一土层中供磷条件下的番茄株高、地上部干、鲜质量均显著高于对照；在相同施磷水平下，0～15 cm 土层的番茄株高、地上部鲜质量均显著高于15～30 cm 和30～45 cm 土层。番茄植株地下部干质量、总根长、根表面积、根体积及0～1.5 mm 直径范围内总根长受施磷水平影响较大，受土层深度影响不明显。综上，不同土层深度及磷水平对番茄地上部生物量均有影响，且表层土壤施磷更利于番茄生物量的积累；根系形态受施磷水平影响较大，受土层深度影响不显著。
Taking tomato cultivar‘ Dongnong 708’ as experimental material，and 3 layers soil from ground
surface（ 0-15 cm，15-30 cm，30-45 cm） as cultivation soil，applying N、K fertilizer as the contrast and N、
P、K fertilizer as treatment，this paper studied the effects of different soil depth and phosphorus level on tomato
biomass and root morphology．Results showed that the biomass of above ground tomato plant was affected by both
P application level and soil depth．In all 3 soil layers，every index at P application treatment was significantly
higher than that in the contrast，and at the same P level，all indexes at 0-15 cm layer were significantly higher
than the other layers．However，the underground biomass，total root length，root surface area，root volume and
root length between 0-1.5 mm diameter were greatly influenced by P application level and the effect by soil depth
was not obvious．In conclusion，soil depth and P level both can affect the biomass of aboveground tomato，and
P application at soil surface was more beneficial for accumulation of tomato biomass．The root morphology was
influenced greatly by P application level，but not by soil depth.
