摘要
头状沙拐枣(Calligonum caput—medusae)系蓼科沙拐枣属植物,灌木或小乔木,叶退化,由同化枝行光合作用。分布于苏联中亚,多生于沙荒地。新疆、甘肃引种栽培,生长良好。中国科学院吐鲁番沙漠植物园于1972年从宁夏中卫引进种子,1977年定植成功。目前,在新疆吐鲁番地区已形成大面积人工林。多年来,对该植物进行过多学科的研究工作,有些已见报导。本文试图从解剖学及水分生理特征入手,探讨其对干旱环境的适应性及其承受力,为进一步开发利用该植物资源,扩大造林提供科学依据,也供同行们在深入研究时参考。
After the observation and determination of anatomy and hydrological physiology, the adaptability and the endurable ability to the arid environment of Calligonum caputmedusae have been understood.
The results show that this plant has many xeromorphic structures to adapt the drid environment, such as: the thick cuticle, the lower stomata with substomatic chambers, the small guard cells, the hypodermis in which there are big cell gaps, the cells full of mucilage, well—developed paliside and fibers, and so on.
When the water content of the sand soil reaches at 52kg/m_~3, the shoots of this species of plant will wilt. At this time, the transpirational intensity of the shoots will be 35mg/g(f. w. )h, the water potency will be—1.6MPa. When the water content of the sand soil reaches at 34kg/m^3, the growing of the mature plant will be checked, the transpiration intensity will be 155mg/g(f. w. )h. and the water potency will be—1.6MPa. It shows that the mature plant of Calligonum caput—medusae has strongger adaptability to the drid condition than the shoot. However, it is necessary to appropriately irrigate for this plant to grow normally.
出处
《干旱区研究》
CSCD
北大核心
1991年第4期33-37,共5页
Arid Zone Research
