始穗 meaning in English

first heading
head emergence

Effects of plant regulator z - s on photosynthesis after anthesis and yield of dry - land rice
始穗后弱光对水稻干物质积累与产量的影响
The effect of materials of drought resistance spray on the photosynthesis and dry matter and yield of rice cultivated in aerobic land
始穗期喷施抗旱剂对地膜旱作水稻后期光合性能及产量的影响
The results indicated that liangyoupeijiu showed better plant and leaf type , higher ratio of grains to leaf area and larger photosynthesis area , stronger ability of population dry matter accumulation during the period of vegetative growth especially from heading to being mature , longer leaf duration and grains - filling after heading than that of its parents and controls s ; more grains per panicle , lager all sink per plant and 1000 - grain weight
结果表明：两优培九株叶型好，粒叶比和光合面积大，营养生长期群体干物质积累能力强，始穗后叶片功能期长、籽粒灌浆持续时间较长，抽穗期至成熟期的干物质增量明显强于其亲本和对照组合；穗颈节间维管组织比亲本及对照发达；两优培九单株总库容量大，每穗实粒数多，千粒重较大。