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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 2 2℃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
The relationship between germination and temperature of alfalfa seeds and the environmental factors on seed germination were studied in the Ulan Buh and sandy areas, and the effects of different sowing dates and sowing techniques on seedling emergence and seedling preservation were studied. The results showed that the suitable sowing period was mid-May and late-midday. The heat required for seed germination is above 2 2 ℃. The dynamic model of alfalfa seed germination prediction was initially established under the special environmental conditions in sandy area. The validation results show that the model can be used to predict the germination of alfalfa seeds under similar conditions