不同光照和温度处理对杉木种子萌发的影响

为探求不同光照和温度对杉木种子萌发的影响,该研究以杉木(Cunninghamia lanceolata)种子为试验对象,设置红光、蓝光、白光3个光照处理条件,每个光照处理条件设0,5,20μmol/(m ²·s)3个光量梯度,并测量了萌发率、萌发指数和发芽势。结果表明:白光5μmol/(m ²·s)、红光20μmol/(m^( 2)·s)条件下萌发率最高(26%),但白光5μmol/(m^( 2)·s)的萌发指数更高(3.1%);不同温度处理下:高温(37℃)会使种子萌发指数下降,最终丧失活力停止萌发;低温(16℃)下种子发芽率较低(18.67%),且种子萌发指数比对照(22℃)低49.28%。

Effect of different light and temperature treatment on seed germination of Cunninghamia lanceolata

In order to explore the effects of different light and temperature on seed germination of Cunninghamia lanceolata,the seeds were treated respectively with red light,blue light and white light.Light intensity gradient of 0,5,20μmol/(m^( 2)·s)was set for each light treatment.The germination rate,germination index and germination potential were also measured.The results showed that the germination rate got the highest(26%)under the condition of 5μmol/(m ²·s)light white and 20μmol/(m^( 2)·s)red light,but the germination index of 5μmol/(m^( 2)·s)white light was higher;As for different temperature treatment,high temperature(37℃)could cause germination index decrease,finally make seeds lose vigor and stop germination;the seed germination rate at low temperature(16℃)was lower(18.67%),with germination index of 49.28%slower than that of the control(22℃).