【摘要】 试验研究树木休眠越冬期间水分代谢与均衡结果表明,越冬初期(11月30日)供试各树种体内含水量为39.36%~49.86%,到翌年3月10日减至34.05%~41.03%,3月中旬开始回升。此期间适宜含水量为35%~50%,>55%则易产生冻裂,<25%繁衍困难,<20%树木死亡。测试树木越冬(11月30日~3月10日)的100d内,水分代谢均衡值为-53.1~-88.3kg,获得补给水量为139.5~211.4kg,消耗水量为192.6~299.7kg,树木体内水分代谢保持负均衡。更多还原

【Abstract】 The water metabolism and balance during the period of trees’ hibernation were studied.The results show that at the beginning of the period of trees’ hibernation, the water content of experimental trees is between 39.36% and 49.86%(Nov.30);to Mar.10 of the next year,it drops to 34.05%～41.03%;then it rises up till the middle of March.During this period,the optimum water content is about 35%～50%.But trees are easily hurt by cold condition while water content is beyond 55%,yet trees are very difficult to reproduce while water content is under 25%,and even they would die when water content is under 20%.Within 100 days (from Nov.30 to Mar.10) of trees’ hibernation,the average value of trees’ water metabolism changes from-53.1kg to-88.3kg.Trees can utilize 139.5～211.4kg water,and consume 192.6～299.7kg water to sustain trees’ water metabolism negative balance.更多还原