The stem diameter and root dry weight of the tomato seedlings sowed in the substrates with 500 g/m~3 N,1 000 g/m~3 P,and 1 000 g/m~3 K increased rapidly,and root activity and root absorption area were significantly higher than that of other treatments.

• 在氮用量为500 g/m3、磷(P2O5)为1 000 g/m3、钾(K2O)为1 000 g/m3的育苗基质中,番茄幼苗茎粗、地下干重的增加明显加快,根系活力和根系吸收面积显著高于其它处理的幼苗。