不同播期对玉米干物质积累的影响及分析

Analysis on Effect of Ecological Factors on Maize Dry Weight Accumulation in Different Sowing Periods

适期早播有利于玉米干物质积累,为后期干物质增长和长时间维持较高的积累速度打下了良好的物质基础。早期玉米干物质积累持续时间适中,积累速度快,且能维持较长的时间,这是光、温、水对玉米群体在时间和空间上良好协调作用的结果。从播期来看,随播期的推迟干物质积累量逐渐减少;从品种来看,2品种YD22和SC704在不同播期均是YD22的干物重积累量大,说明YD22有着较大的增产潜力。

It is beneficial to dry weight accumulation for maize in early sowing.It sets good foundation of dry weight for increasing in later period and the high-speed accumulation for a long time.The duration of early sowing maize dry weight accumulation is moderate;the accumulative speed is quick and can maintain for a long time.The cause is that sunlight, temperature and water can coordinate in time and space of the maize group very well.With the delay of seeding time,dry weight accumulation gradually decreases.At different seeding time,the variety YD22's dry weight accumulation is more than SC704.This suggests that YD22 has bigger production potentiality.