重庆市冬小麦低温冷害的变化规律及防治措施研究

对重庆市冬小麦低温冷害的变化规律进行研究并提出相应的防治措施。利用重庆市34个测站1960~2008年冬季（2月）日平均气温资料,根据小麦低温冷害的标准,分析重庆市冬小麦低温冷害的时空分布特征。结果表明,重庆市低温冷害多发区域集中在东部高寒山区,多为局部发生;从时间分布上,20世纪60年代至70年代前期（1960~1972年）为冷害的频发时段,90年代以后为冷害低值期。可根据低温冷害发生的时空分布,选择抗寒品种、掌握最佳播期等措施尽量减少低温冷害对冬小麦产量的不利影响。

Study on Law and Preventive Treatment of Winter Wheat Cold Damage in Chongqing

Do research on law of cold damage to winter wheat in Chongqing,and point out the preventive treatment.Using the climate data of 34 weather stations from 1960 to 2008,according to the grading indices of cold damage,the characteristics of temporal-spatial distribution of cold damage to winter wheat were analyzed.Research results showed that most frequent area of cold damage was eastern high and cold mountain area of Chongqing and well occur locally.From the time distribution,the 1960s and early 1970s was the most frequently period of clod damage;it's the low-value period of cold damage after 1990s,according to the space-time distribution of cold damage,the precaution measures such as variety selection,sowing-date choice,cultivating mode adjustment,etc should be taken to reduce the adverse effect of winter wheat production.