摘要
在实验室条件下研究了沙米种子的萌发特性,结果表明:沙米种子在全光照和半光照条件下表现出很高的发芽率和出苗率,而在黑暗条件下出苗率很低但发芽率仍然很高;沙米种子在埋深为0.5 cm、1 cm、2cm条件下表现出很高的发芽率和出苗率,而在埋深为3 cm条件下发芽率和出苗率很低;沙米种子的发芽率和出苗率随降雨量的增加而增大,其中在降雨量为5 mm条件下沙米种子几乎不能出苗。另外,即使在满足发芽的条件下,沙米种子也不会全部发芽,而是表现出明显的休眠性,以适应流沙特殊的环境条件。
The characteristics of seed germination ofAgriophyllum squarrosum are studied in laboratory. The results show that the seeds have a high budding percentage and emergence rate under the full illumination and semi - light conditions, and they have a low emergence rate but a high budding percentage in the darkness. The seeds of Agriophyllum squarrosum show a high budding percentage and emergence rate in depth of 0. 5 cm, 1 cm, 2 cm, but show a low budding percentage and emergence rate in depth of 3 cm. The budding percentage and emergence rate of the seeds with the increase of rainfall, but the seeds almost can not germinate if the rainfall is 5 mm. In addition, even under the conditions of germination, not all the seeds will bud, but show the obvious dormancy in order to suit the special environmental conditions of shifting sand.
出处
《内蒙古林业科技》
2009年第1期27-29,共3页
Journal of Inner Mongolia Forestry Science and Technology
基金
内蒙古自治区自然科学基金项目(编号200711020210)资助
关键词
沙米
先锋植物
萌发特性
Agriophyllum squarrosum
pioneering plant
germination
