Abstract: Both temperature and other environmental factors influenced on germination of Alfalfa at Wu Lan Bu He sandy ground were studied in this paper.The determination good time for begin sowing was the middle/last ten days of May.Have a discussion on different seeding date and seeding technical influences on emergence and seedling percentage.Accumulative quantity of heat time germinate requirement were above 22℃.Conceptual founded and verified dynamic models of Alfalfa seed germination was advance in the sandy ground this particular environmental condition.Use of the model may have calculate Alfalfa seed germination in the similar cases.

Key words: Alfalfa, Germination, Planting, Calculate model

摘要： 研究乌兰布和沙区紫花苜蓿种子发芽与温度的关系及环境因素对种子萌发的影响,探讨不同播种期和播种技术对出苗和保苗的影响。结果表明,适宜播种期为5月中、下旬。种子发芽所需热量累积为22℃以上。在沙区特殊环境条件下,初步建立紫花苜蓿种子萌发预测的动态模型,验证结果表明,该模型可用以预测类似条件下紫花苜蓿种子的萌发。

关键词: 紫花苜蓿, 萌发, 建植, 预测模型