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通过对高产条件下紧凑型夏玉米不同生育时期群体光合特性与同化产物积累量、籽粒产量及产量构成因素间的灰色关联分析,明确了籽粒产量在吐丝以前各生育时期与叶面积系数关系最为密切,在吐丝以后的各生育时期主要依赖于同化产物的积累,各生育时期同化产物的积累则主要同叶面积系数密切相关,叶面积系数、光合势和净同化率对籽粒产量的关键作用时期为吐丝至吐丝后15天.同化产物积累量对籽粒产量的决定作用随生长发育的进行而逐渐增大.在产量构成三要素中,单位面积穗数与拔节至吐丝期间的叶面积系数关系最为密切;穗粒数和千粒重则主要依赖于大喇叭口期或吐丝期以后的同化产物积累.
Through the gray correlation analysis of photosynthetic characteristics and assimilate accumulation, grain yield and yield components of compact summer maize at different growth stages under high yielding conditions, it was clarified that the relationship between the grain yield and the leaf area coefficient at each growth stage before silking was the most Closely related to the accumulation of assimilation products during each growth period after silking. The accumulation of assimilation products during each growth period was mainly related to the leaf area coefficient. The key role of leaf area index, photosynthetic potential and net assimilation rate on grain yield The period from spinning to spinning 15 days.The accumulation of assimilation products on the grain yield determination role with the growth and development of the gradual increase in the yield components of the three elements, the spike per unit area and the time from jointing to spinning The coefficient of area was the most closely related. The grains per spike and 1000-grain weight mainly relied on the accumulation of assimilation products after the big bellmouth or silking stage.