秋冬春连续干旱对冬小麦生育前期根系发育与生理活性的影响

Effects of Long-running Drought Stress from Autumn to Spring on Root Development and Physiological Vigor of Winter Wheat in Early Growing Period

就秋冬春连续严重干旱对冬小麦生育前期根系发育及生理活性的影响进行了研究。结果表明,与对照相比,干旱条件下,单株次生根数、主茎次生根数、一级分蘖次生根数显著减少,根系活力显著降低,其中主茎次生根数减少和根系活力降低的程度达极显著水平(P<0.01)。

The effects of long- running drought stress from autumn to early spring on the root development and physiological vigor of winter wheat in early growing period were studied in Xiayi County, Henan Province. The results showed that under the drought stress, the nodal roots per plant, the nodal roots of main stem, the nodal roots of the primary tillers and the root vigor significantly decreased compared with those of the control. Among them, the nodal roots of the main stem and the root vigor extremely significantly decreased （ P 〈0.01） under the stress.