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扬麦158和扬麦5号抽穗到成熟37d。扬麦158抽穗后干物质重增长日数为34d,扬麦5号为31d。扬麦158灌浆干物质积累前期13d,平均日增长量0.56g;中期12d,平均日增长量2.06g;后期12d,平均日增长量0.98g,呈一条前慢中快后缓的logistic曲线。若与扬麦5号比较,日增长量扬麦158比扬麦5号前期高3.6%,中期高7.85%,后期高139%。抽穗期干旱与渍害均影响千粒重。就品种而言,穗期抗逆(干旱、渍害)能力扬麦158强于扬麦5号。
Yangmai 158 and Yangmai 5 heading to maturity 37d. Yangmai 158 heading date after the heavy dry matter 34d, Yangmai 5 31d. In the first 12 days, the average daily growth was 0.56g. The average daily increment was 2.06g in the middle 12 days. The average daily growth was 0.98g in the late 12 days, showing a logistic curve. Compared with Yangmai 5, the daily growth of Yangmai 158 was 3.6% higher than the previous period of Yangmai 5, 7.85% in the middle period and 139% in the later period. Drought and waterlogging affect grain weight at heading stage. In terms of varieties, the ability to resist frost (drought, waterlogging) at the ear of Yang Mai 158 is stronger than that of Yang Mai 5.