【摘要】 使用甘肃西峰试验田的地面平行观测资料,分析了2006年陇东黄土高原冬小麦异常旺长的气候特征、多年秋季冬小麦生长高度对气候变暖的响应。结果表明:2006年秋季冬小麦异常旺长是发生概率相对较小事件;10月平均气温≥10.0℃时,多年秋季冬小麦高生长高度随气温的上升而显著增高,在≥10℃积温达到580℃以上时,随着积温的增加高生长高度明显增加;10月平均气温每升高1℃,叶面积指数增加0.4,在≥10℃积温达到550℃以上时,随着积温的增加叶面积指数明显增加;大蘖数随着10月平均气温和≥10℃积温的增加呈反抛物线型增加;为达到主动控制冬小麦冬前异常旺长和减少水分及养分不合理消耗的目的,秋播应推迟5d左右,积极有效地应对气候变暖对冬小麦的负面影响。更多还原

【Abstract】 Based on the parallel observation in experimental fields in Xifeng City of Gansu Province,the climatic characteristics of winter wheat extraordinary flourishing on Loess Plateau of eastern Gansu in 2006 and the responses of many years winter wheat’s autumn growth to climate warming were analyzed.The results showed that the winter wheat extraordinary flourishing in autumn 2006 was an event with relatively smaller probability.When the mean air temperature in October was ≥10.0 ℃,the winter wheat height growth in autumn increased obviously with increasing air temperature;and when the accumulated temperature of ≥10.0 ℃ achieved above 580 ℃,the height growth increased obviously with increasing accumulated temperature.When the mean air temperature in October ascended by 1 ℃,the leaf area index increased by 0.4;and when the accumulated temperature of ≥10.0 ℃ achieved above 550 ℃,the leaf area index increased obviously with increasing accumulated temperature.The numbers of big tiller increased in counter-parabola shape with the increasing mean air temperature in October and accumulated temperature of ≥10.0 ℃.In order to actively control the winter wheat extraordinary flourishing before winter and to reduce the unreasonable consumption of soil moisture and nutrients,autumn sowing should be postponed about 5 days,so as to positively and effectively reduce the negative effects of climate warming on winter wheat growth.更多还原