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冬小麦根系的生长发育可概括为根系的形成、壮大和逐渐衰亡三个阶段。初生根对根系乃至小麦的整体生育具有奠基作用。其发根条数与单株成穗的相关系数为０．９６６８；次生根条数与穗粒数的相关系数为０．９７２９。不同根序长度差距甚大，其增长速度依次是早发根＞后发根。根系在土层中基本呈伞状分布。在保持土壤原结构条件下，采用小型土传统体隔离分期完整出坑冲洗的取样方法，能够更清楚地观测各生育期根系的全貌。
Winter wheat root growth and development can be summarized as root formation, growth and gradually decline three stages. Primary roots have a fundamental role in the overall fertility of roots and even of wheat. The correlation coefficient between the number of hairy roots and the number of ears per plant was 0.9668. The correlation coefficient between the number of secondary roots and the number of grains per ear was 0.9729. The differences of the length of the different root sequences are very big, and the growth rate is followed by the root of early-onset hair> the root of hair. Roots in the soil is basically umbrella-like distribution. Under the condition of maintaining the original structure of the soil, the sampling method of complete plowing flushing by isolation and staging of small soil traditional body can be used to observe the whole picture of root system more clearly.