不同类型水稻根系形态特性实验方法的比较与分析

Comparative analysis on the experimental methods for root morphological traits of different type of rices

通过对不同类型水稻根系的根长、根重、根的体积、总根数、白根数等形态特性指标的比较，发现根数主要取决于拔节期至抽穗期，且在不同时期各个指标的变化幅度是杂交稻大于常规稻，杂交稻在各个时期根系形态特性指标比常规稻相对都要大。

The objective of the experiment is to introduce the morphological traits of root, and emphases on its important role for rice yield formation. Comparisons of the morphological traits, which include the root length （ RL）, root weight （ RW）, root volume （ RV）, total number of roots （TNR） and number of white roots, among different types of rices, were conducted. The results showed that the hybrid rice with larger value and broader variation range for these morphological traits than those of the inbred rice varieties, The number of roots were depended on the development during the stem extension stage to heading stage.