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东北春麦区是我国春小麦的主产区,面积约占全国春小麦总面积的一半,其中尤以黑龙江省面积最大,每年在3,000万亩左右,约占该区春小麦面积的95%以上。东北春小麦生育期短,一般只有80—90天。小麦生育前期温度上升快,降水少,蒸发量大,后期高温多雨。前旱后涝的气候条件,直接影响小麦的生长发育和产量形成。从产量构成角度分析(单位面积产量=单位面积穗数×每穗粒数×每粒重量),东北春小麦
Spring wheat region of northeast China is the main spring wheat producing area in China, accounting for about half of the total area of spring wheat in the country, especially Heilongjiang Province with the largest area of about 30 million mu per year, accounting for more than 95% of the spring wheat area in the region. Northeast spring wheat growth period is short, usually only 80-90 days. Wheat early rapid increase in temperature, less precipitation, evaporation, late high temperature and rainy. The climatic conditions of drought and waterlogging before drought directly affect the growth and yield formation of wheat. From the perspective of yield composition (yield per unit area = spikes per unit area × grains per spike × weight per grain), northeast spring wheat