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利用大型活动式遮雨棚遮挡自然降水 ,采用人工控制定量喷灌模拟冬小麦生产中 3、5、7、1 0、1 4a一遇的春旱年型 ,研究不同春旱年型对冬小麦不同生长发育阶段和产量的影响。试验结果表明 :随着春旱年型的增加 ,冬小麦根、茎、叶的生长速度明显降低 ,总生物量减少 ;春季干旱使冬小麦春生分蘖减少 ,单位面积总穗数减少 ,穗长变短 ,穗粒数减少 ,千粒重降低 ,不孕小穗数增加 ;3、5、7、1 0、1 4a一遇春旱处理的冬小麦产量分别比CK减少 2 6 %、1 4 6 %、2 2 1 %、4 3 0 %、4 7 2 %。春季干旱程度与冬小麦产量呈指数曲线相关。
The use of large movable shelters to shelter from natural precipitation, artificial control of quantitative sprinkler irrigation in winter wheat production 3,5,7,1 0,1 4a a case of spring drought, different spring dry years on the different growth and development of winter wheat Phase and the impact of production. The results showed that with the increase of spring drought years, the growth rate of winter wheat roots, stems and leaves decreased significantly, and the total biomass decreased. The spring drought reduced winter wheat tillers, decreased total spike per unit area, shortened spike length, The number of grains per spike decreased, the grain weight decreased and the number of spikelets increased. The yield of winter wheat treated with spring droughts decreased by 26%, 14%, 21%, 21% %, 4300%, 4772%. The degree of spring drought is related to the exponential curve of winter wheat yield.