倒春寒危害软籽石榴树的温度及受害情况研究

以突尼斯软籽石榴为试材,在倒春寒发生前2 d开始持续监测石榴树冠层温度,倒春寒结束后调查石榴树受倒春寒危害的临界低温及寒害症状。结果表明,软籽石榴树春季生长期间,岭地、沟地和台地石榴树冠层温度降至1.4℃、-0.1℃、2.3℃,气象预报低温低于6.4℃时,石榴树芽和新梢发生低温寒害,芽尖焦枯发黑,芽体展叶受阻;新梢幼叶扭曲畸形,叶缘焦枯。

Investigation and research on the effect of late spring coldness on the growth of soft seed pomegranate trees

Tunisia soft-seed pomegranate was used as experimental material and the canopy temperature of pomegranate trees was monitored continuously two days before the last spring coldness.After the late spring coldness,the critical low temperature and chilling symptoms of pomegranate trees were investigated.The results showed that the canopy temperature of pomegranate trees in hilly land,depression and tableland decreased to 1.4℃、-0.1℃and 2.3℃and the low temperature of weather forecast was lower than 6.4℃,the cold damage of pomegranate buds and new shoots occurred.The tip of the young buds were scorched and blackened and the young leaves were thin and twisted,and buds development were blocked;the leaves of new shoots were twisted and deformed,and the leaf margin was scorched.