The freezing-thawing resistance is an index of durability of sand-fixation agent under subzero temperature. 抗冻性反映固沙剂在低温环境下固沙的耐久性能。
These facts indicated that the development of freezing resistance of P. tomentosa cuttings induced by freezing acclimation required a certain temperature and duration. 反映了毛白杨幼苗抗冻性的诱导与发育需要一定的温度和锻炼时间。
