摘要
本文研究不同播种时间对海滨猫尾木种子萌发的影响,以及淹水、盐度、低温条件对其实生苗生长的影响。结果表明,海滨猫尾木种子千粒重为52g,种子密度0.021g·cm^-3,种子首次出芽时间在9~16d不等,发芽率和发芽势随着播种时间推移逐渐降低。水淹至根颈对幼苗生长影响不显著,完全水淹22d后幼苗开始死亡。幼苗耐受盐分浓度为10g·kg^-1,盐分浓度超过10g·kg^-1不利于幼苗正常生长,盐分浓度超过18g·kg^-1幼苗叶片开始卷曲、脱落。3℃低温胁迫对幼苗正常生长有不利影响,0℃会导致幼苗呈现半致死状态。海滨猫尾木种子适宜随采随播,幼苗具有较强的耐水淹特性,适生盐度范围广,不耐低温。
The seeds of Dolichandrone spathacea were tested with different sowing time,and the growth of seedlings under different flooding,salinity and low temperature conditions was also studied.Results showed that 1000-grain weight of D.spathacea seed was 52 g,seed density was 0.021 g·cm^-3,and seed germination time was 9-16 d.The germination rate and germination potential gradually decreased with planting time.Effect of flooding below the crown on seedling growth was not significant.After flooding 22 d,the seedlings began to die.The salt tolerance of seedlings was 10 g·kg^-1,and the salt concentration above 10 g·kg^-1 would not be conducive to normal growth of seedlings.Leaves of seedlings with salinity over 18 g·kg^-1 began to curl and fall off.Low temperature stress at 3℃began to affect the normal growth of seedlings,and 0℃caused the seedlings to be semi-lethal.The seeds of D.spathacea were suitable for sowed soon after collecting.The seedling had higher flooding tolerance and higher salt tolerance,but was sensitive to low temperature.
作者
刘德浩
廖文莉
陈智涛
舒夏竺
徐平
LIU De-hao;LIAO Wen-li;CHEN Zhi-tao;SHU Xia-zhu;XU Ping(Huizhou Institute of Forestry,Huizhou 516001,Guangdong China)
出处
《亚热带植物科学》
2019年第2期134-138,共5页
Subtropical Plant Science
基金
广东省林业科技创新项目(2017KJCX058)
关键词
海滨猫尾木
育苗
水淹
盐度
低温
胁迫
Dolichandrone spathacea
nursing trial
flooding
salinity
low temperature
stress
