杂交粳稻、常规粳稻、旱稻及籼稻根系特征比较

由于根系研究的难度较大，根系育种相对滞后。采用盆栽的方式，对北方不同类型水稻品种的根系特征进行比较，为水稻高产根系育种提供依据。结果表明：（1）与常规品种相比，杂交稻具有明显的根系优势，主要表现在发根力强，根系粗长，根体积、根系吸收面积、根重和根冠比都较大；常规品种则根多、根细而分枝多，根系衰退晚且慢。（2）早稻品种发根力强、根较长，根系比表面积大，根冠比较大。（3）与粳稻相比，籼稻根较少，根体积较大，根粗长，根系吸收面积和比表面积都较小，根冠比小，后期衰退早且快。

Comparison in Root Characteristics Among Japonica hybrid Rice,Japonica conventional Rice,Upland Rice and Indica Rice Varieties

Because of difficulty in root research, breeding by root is retarded relatively. In this paper, root characteristics were compared among different types of varieties by using the method of potted planting to provide the basis for rice root breeding. The results showed that: (1) The hybrid rice was superior to traditional varieties in rooting capacity, root length, root volume, root absorbing area, root dry weight and the ratio of root to the aboveground, on the contrary, the root system of traditional varie...