层积处理时间对棠梨种子出苗率的影响

Effects of Stratification Duration on Seedling Emergence Rate of Birchleaf Pear Seeds

通过不同层积处理时间对棠梨 (Pyrusbetulaefolia )种子出苗率的影响试验 ,表明层积处理 30d的棠梨种子出苗率最高。处理少于 30d的种子出苗率随时间减少而降低 ,其中层积处理少于 2 5d的种子出苗率下降幅度更大 ;层积处理时间超过 30d的棠梨种子出苗率亦较 30d者为低。

The effects of stratification duration on seedling emergence rate of birchleaf pear (Pyrus betulaefolia)seeds were studied .The results showed the seedling emergence rate of seeds was greatest when seeds were stratified for 30 days. If the stratification duration was shorter than 30 days ,the seedling emergence rate of seeds would reduce as the duration of stratification decreased, especially when duration of stratification was shorter than 25 days. However, seedling emergence rate of seeds germination reduced when duration of stratification was longer than 30 days.