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在作物生长过程中,划分出若干个生理和(或)发育时期很有用,一来可分析由环境所强加的限制生产因素发生的特定时间,二来能研究供育种者使用的有效胁迫筛选技术。前者与在最敏感时期采取何种栽培措施有关,而这两者均与作物育种方法相关联。目前正试图依据籽粒数(粒/米~2)和籽粒大小(克/百粒)等产量组分,部分地分析由环境诱导的籽粒产量
It is useful to identify several periods of physiological and / or developmental stages of crop growth to analyze the specific times at which limiting production factors imposed by the environment occur and to study effective screening techniques for breeders’ use . The former is related to what cultivation measures are taken in the most sensitive period, both of which are related to crop breeding methods. At present, attempts are made to partially analyze the environmental-induced grain yield based on the yield components such as the number of grains (grains / m 2) and the grain size (g / 100 grains)