冬小麦进入返青期后,生育特点明显改变,已由感温阶段进入感光阶段。此时麦苗的抗寒性比冬季大大降低,如遇到春寒或晚霜,极易遭受冻害。为此,生产上要采取积极措施加以防范。 一、耙麦。在土壤开始返浆时进行顶凌耙麦,可起到提墒保墒、壮根促蘖的作用,不仅有利于小麦个体发育,而且能够提高植株御寒能力。 Winter wheat into the greening period, the characteristics of fertility significantly changed, from the temperature sensing stage into the light-sensitive stage. Cold-resistant wheat seedlings at this time greatly reduced than in winter, such as spring or night frost encountered, vulnerable to frost damage. To this end, production should take active measures to prevent. First, rake wheat. At the beginning of the soil back to the top Ling rake rake, can play to mention moisture soil moisture, strong roots to promote tillering effect, not only conducive to the development of individual wheat, but also can improve the plant ability to keep warm.