[1]杨成超. 杨树越冬死亡的有效冻融伤害累积效应[J].西北林学院学报,2017,32(6):12-17.[doi:10.3969/j.issn.1001-7461.2017.06.02]
　YANG Cheng-chao. Mechanism Underlying Overwintering Death in Poplar: the Cumulative Effect Hypothesis Involving Effective Freeze-thaw Damage[J].JOURNAL OF NORTHWEST FORESTRY UNIVERSITY,2017,32(6):12-17.[doi:10.3969/j.issn.1001-7461.2017.06.02]
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 杨树越冬死亡的有效冻融伤害累积效应()
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《西北林学院学报》[ISSN:1001-7461/CN:61-1202/S]

卷:
第32卷
期数:
2017年第6期
页码:
12-17
栏目:
出版日期:
2017-11-30

文章信息/Info

Title:
 Mechanism Underlying Overwintering Death in Poplar: the Cumulative Effect Hypothesis Involving Effective Freeze-thaw Damage
文章编号:
1001-7461(2017)06-0012-06
作者:
 杨成超
 （辽宁省杨树研究所，辽宁 盖州 115213）
Author(s):
 YANG Cheng-chao
 (Liaoning Provincial Institute of Poplar,Gaizhou,Liaoning 115213,China)
关键词:
 ; 杨树; 越冬死亡; 机理; 有效冻融; 抗冻融度; 冻害
Keywords:
Populus;  overwintering death;  mechanism;  effective freeze-thaw;  freeze-thaw resistance degree;  freeze injury
分类号:
S792.11
DOI:
10.3969/j.issn.1001-7461.2017.06.02
文献标志码:
A
摘要:
 为了阐明杨树越冬死亡机制，根据5 a田间定位观测结果，分析杨树越冬死亡、树干破腹与温度及光照的关系。采用室内控制试验的方法，研究低温和冻融循环对不同杨树无性系萌芽率、相对电导率的影响。结果表明，低温并非越冬死亡的充分条件，负积温与杨树越冬死亡无明确因果关系。冻融循环比持续低温对杨树造成的伤害更大。抗寒性不同的无性系耐冻融循环的能力不同。随着冻融循环次数的增加，杨树萌芽率逐渐降低。抗寒性较强的无性系相对电导率低。提出与杨树越冬死亡相关的抗冻度、有效冻融和抗冻融度3个概念及有效冻融伤害累积效应假说。
Abstract:
 In order to understand the mechanism of poplar overwinter death,based on a 5-year field observation in fixed plots,the relationships between the overwinter death as well as trunk break and temperature and sunshine were investigated.Indoor controlled method was adopted to examine the effects of low temperature and freeze-thaw cycles on the bud burst rates and relative electrical conductivity.The results indicated that low temperature was not the necessary condition for overwintering death,and there was no clear causal relationship between negative accumulated temperature and overwintering death.Freeze-thaw cycles were more damaging than constant exposure to low temperature.Resistance to freeze-thaw cycles differed among clones,while the bud burst rate decreased with increasing exposure to freeze-thaw cycles.Cold-resistant clones had the lowest relative electrical conductivity levels.We proposed the cumulative effect hypothesis involving effective freeze-thaw damage and three concepts,such as effective freeze-thaw,freeze resistance degree,freeze-thaw resistance degree.

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备注/Memo

备注/Memo:
 收稿日期：2016-12-17修回日期：2017-06-06
基金项目：辽宁省农业攻关及成果产业化课题(2015103002)；辽宁省科学事业公益研究基金(2011005008)。
作者简介：杨成超，男，博士，教授级高级工程师，研究方向：林木遗传育种与栽培生理。E-mail:yangchengchao@sina.com
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