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以北京、天津、菏泽、驻马店、商丘、阜阳6个站点为代表,分析了黄淮海平原2004-2005年冬季冬小麦的冻害成因。研究表明,冬小麦冻害的发生主要是由于从小麦播种至当年12月20日积温过高,造成部分麦田在入冬前就完成了6-8片叶的生长,甚至进入了拔节期,再加上从当年12月20日至次年2月底黄淮海大部分地区气温比常年偏低1.3℃左右,且冷暖交替突变,麦苗抗寒锻炼不足,春性品种过多和播种量过大等原因。
Taking Beijing, Tianjin, Heze, Zhumadian, Shangqiu and Fuyang as representatives, the causes of frost damage of winter wheat in the Huang-Huai-Hai Plain in 2004-2005 were analyzed. Studies have shown that winter wheat frost damage occurs mainly due to sowing from wheat to December 20 that year when the temperature is too high, resulting in some wheat fields in the winter before the completion of 6-8 leaf growth, or even into the jointing stage, plus From December 20 of the current year to the end of February next year, the temperature in most parts of the Huang-Huai-Hai area is about 1.3 ℃ lower than that in normal years, with alternating cold and warm spots, lack of cold-resistant wheat seedlings, excess spring varieties and over-sowing.