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在群体水培条件下，选用于茎伸长节间数分别为４（早稻），５（中稻），６（晚稻）个的代表品种９个及对原只６个伸长节间的品种进行播期和短日照处理，改变其伸长节间数，培育成４，５．６个３种类型，研究不同品种（处理）根系的发生和活力。结果表明：（１）主茎伸长节间数相同的品种具有类似的发根规则和根系构成（上层根率），伸长节间数不同的品种发根规则和根系构成差异很大；（２）结实期平均根系活力随伸长节间数的增加而下降；（３）改变品种的伸长节间数，其发根规则、根系构成及根系活力亦随之发生变化，其趋势与伸长节间数不同的品种间趋势一致。出上认为，根系的发根规则、根系构成、根系活力与品种的伸长节间数有关。依据上述结论，对不同类型水稻品种培育优质根系的侧重点进行了讨论。
Under the condition of population hydroponics, 9 representative cultivars of 4 (early rice), 5 (middle rice) and 6 (late rice) internode elongation were selected and cultivars of 6 elongate internodes Sowing date and short daylight, changing the number of its internodes, cultivating into 4, 5 and 6 3 types to study the occurrence and vitality of different varieties (treatments) of root system. The results showed that: (1) The same number of internodes of main stems had similar rooting rules and root constitution (upper rooting rate), while the varieties with different number of elongate nodes had different hair root rules and root constitutions; 2) The average root activity decreased with the increase of number of internodes during the grain-filling stage. (3) The change of the number of internode elongation, the rooting rule, the root system and the root activity also changed. The trend and extension Length of the number of different varieties between the same trend. Out of the view that the roots of hair root rules, root system, root activity and elongation of varieties of internodes. Based on the above conclusions, the emphasis of cultivating high quality root systems for different types of rice varieties is discussed.