从禾谷类作物旗叶的伸长、展开直至抽穗前称为孕穗期。拔节至孕穗期是禾谷类作物从起身拔节开始至抽穗开花前这一阶段，亦称营养与生殖生长并进期
The result indicated that the rice booting stage and heading stage were the optimum infection stage.
分生孢子接种试验结果表明，稻曲病菌在水稻孕穗期和破口期较易侵入。
参考来源 - 稻曲病菌的生物学、侵染特性及遗传多样性研究·2,447,543篇论文数据，部分数据来源于NoteExpress
拔节孕穗期长，幼穗分化充分，有利于壮秆大穗的形成。
The stage from jointing to booting is long and the differentiation of young ear is abundant.
试验研究了拔节孕穗期水分胁迫对水稻生长发育及产量的影响。
Effects of water stress on growth and yield of rice were studied in jointing-booting stage.
根据这15份材料的孕穗期耐冷性特征，将它们的耐冷型划分成6类。
The types of the 15 varieties might be considered into 6 types on the basis of their cold tolerance at booting stage.
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