不同种源沙枣苗期生长特性研究

通过不同种源（甘肃民勤、宁夏中卫、内蒙古乌海、陕西愉林及内蒙古土左旗等）沙枣的播种育苗试验，从沙枣的种子特性、出苗率、苗术的生长量与生物量等方面，对不同种源沙枣苗期生长特性进行了研究。结果表明：从苗木的生长适应性和抗旱性角度，甘肃民勤和宁夏中卫种源及乌海种源可选择为继续进行造林试验的种源。陕西榆林种源在高生长、当年生物量、地下根系深度和粗度等指标都较差，应淘汰。

Growth Characteristics at the Seedling Stage for Elaeagnus angustifolia from Different Seed Sources

Through the test on raising seedlings by sowing with Elaeagnus angustifolia from Minqin in Gansu, Zhongwei in Ningxia, Wuhai in Inner Mongolia, Yulin in Shaanxi and Tuzuoqi in Inner Mongolia, the researches have been done on growth characteristics at the seedling stage for Elaeagnus angustifolia from different seed sources at the aspects such as seed characteristics, emergence rate, growth and biomass. The results show that at the aspect of growth adaptability and drought resistance, Elaeagnus angustifolia from Minqin in Gansu, Zhongwei in Ningxia and Wuhai in Inner Mongolia can be chosen as the seed source for afforestation test. Being poor on height growth, current - year biomass, depth and thickness of underground root system, the seed source from Yulin in Shaanxi should be eliminated.