摘要
以黄土高原主要造林树种文冠果、油松、侧柏、栾树种子为试验材料,于2012年11月,在试验条件下,设置10、20、30、40℃4个温度梯度,按照随机区组设计的试验方法,通过测定种子吸水率和浸提液的相对电导率来研究黄土高原4种主要造林树种种子的吸水特性,为进一步探索种子发芽期间的生理变化提供理论依据。结果表明:黄土高原主要造林树种种子对水分的吸收表现出阶段性的特征,具体表现为"快-慢-稳";种子的形态特征(主要受遗传因素的控制)决定了种子的吸水率和相对电导率的大小;在一定条件下,种子的吸水率和浸提液的相对电导率随着浸种时间和温度的增加而增大。
A laboratory study was made on the seeds of four main afforestation species including Yellow Horn （Xanthoceras sorbifolia Bunge） , Chinese Pine（ Pinus tabuliformis Can＇） , arborvitae（ Platyclaclus orientalis L. ） and Goldenrain Tree（Koelreuteria paniculata L. ） in Loess Plateau in Nov. 2012.10 ℃ ,20 ℃ ,30 ℃ and 40 ℃ four temperature gradients were Set, in accordance with the randomized block Group of experimental methods, measure water absorption of seeds and relative conductivity of seed extracts to research the water-absorbent characteristics of the process and preliminary study of physiological changes. The results showed that： Water absorption in seed germination process of the four main afforestation species in Loess Plateau were on the performance of stages, which included sharp soaking, stable soaking and saturated soaking stages. The morpho logical characteristics of seeds was mainly affected by the control of genetic factors, which determined the size of seed water absorption and the length of seed germination cycle. Under certain conditions, the water absorp tion of seeds and relative conductivity of seed extracts were positively correlated with seed soaking time and water temperature.
出处
《种子》
CSCD
北大核心
2013年第11期11-15,共5页
Seed
基金
科技部国家"十二.五"科技支撑计划项目(编号:2012 BAD22 B 03-03)
西北农林科技大学基本科研业务专项资金项目(编号:ZDXM 2012-10)
关键词
黄土高原
造林树种
种子
吸水特性
loess plateau
afforestation tree
seed
water absorbing character
作者简介
主力五（1966-），男，博士，副教授，硕士生导师，主要从事干旱区森林培育的理论和技术、植被恢复和天然林恢复的教学和研究工作；E-mail：waIlg7082261@163．com。
