春性小麦的晚霜冻及防治研究

A Study on Late Frost Damage to Springness Wheat and Its Prevention

晚霜冻在长江下游对春性品种小麦扬麦１５８、扬麦５号会造成冻害，暖冬年１０月２０日前播种的春性小麦会因受到冻害而减产。受冻后的扬麦１５８有良好的自我恢复能力，减产幅度比扬麦５号小。长江下游１０月下旬初播种的春性小麦高产稳产，冬春镇压能预防与减轻早播麦的晚霜冻害，冻害后补肥有利于提高恢复能力。

pringness wheat, i.e Yangmai No.5 and Yangmai 158, were frequently suffered from late frost damage in the lower reaches of Yangtze River. The output of springness wheat reduced by late frost damage in warm winter if it is sowed before Oct. 20, but the yield is high and stable if it is sowed in early days of the late ten days of October.Yangmai 158 possesses better recovering ability than Yangmai No.5 when suffered from late frost, so it has less yield losses. It is beneficial to recovering of damaged springness wheat by fertilizer supplement. Pressing in winter or spring can prevent or lessen the late frost damage. Spreading manure has a good effect.