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1997年秋播至越冬期,我市气温持续偏高,小麦生育进程加快,10月25日前早播的板茬麦和套播麦在翌年1月上、中旬就开始拔节,18～21 日气温骤降,极端低温-6.5℃,发生严重冻害。据调查,主茎幼穗平均冻死率在70％左右。冻害发生后,我们及时进行了抗灾补肥试验,定株系统观察,为抗灾应变管理提供了科学依据。1 试验概况 试验设在宜兴市洋溪镇赵小麦丰产方内,供试小麦品种“扬麦158”,土壤地力较高,播种采用免
In the autumn of 1997, when the winter was overwintering, the temperature in our city continued to be high, and the process of wheat growth accelerated. The early-sowing of wheat and sowing wheat before October 25 was started in mid-January on January 25, and the temperature of 18-21 days Drop, extreme low temperature -6.5 ℃, serious freezing damage. According to the survey, the average mortality rate of the main stem fry is about 70%. After the frost damage occurred, we carried out the disaster-resistant fertilizer test in time and the observation of the fixed-plant system provided the scientific basis for the management of the disaster-resistant strain. 1 Test Profile The experiment is located in Yangxi Town, Yixing City, Zhao wheat high yield side, the test wheat variety “Yang Mai 158”, higher soil fertility, sowing to avoid