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:1 997～ 1 998年对 4个不同紧凑株型玉米杂交种的灌浆生理特性进行了研究 ,结果表明 :(1 )在灌浆期各杂交种的籽粒体积和粒重增长的时序动态表现不同 ,籽粒体积呈“前快后慢型” ,粒重的增长呈“前慢中快后慢型”。 (2 )供试 4个杂交种籽粒体积和粒重增长的最大时期 (临界期 )均表现差异显著。在养分供应和管理上应因品种而宜 ,实行动态管理。 (3)运用充实指数、饱满指数度量玉米杂交种在灌浆期的籽粒充实能力切实可行
: The grain filling physiological characteristics of four different compact plantings of maize hybrids from 1997 to 1998 were studied. The results showed that: (1) The temporal dynamics of grain volume and weight gain of hybrids differed at different grain filling stages, The grain volume was “fast before and after slow”, grain weight growth was “slowly slow before the slow.” (2) The maximum period (critical period) of grain weight and grain weight of 4 hybrids tested showed significant difference. Nutrient supply and management should be due to varieties and dynamic management. (3) It is practicable to measure the grain filling ability of maize hybrids at grain filling stage by means of substantial index and plump index