论文部分内容阅读
研究了内蒙古地区的气温及土壤温度变化情况对牧草种子播期选择的影响。通过对内蒙古呼和浩特地区4至8月的气温及不同土层处温度的测定和研究,建立了气温与不同土壤播层温度的预测关系式。研究结果表明:确定牧草种子适宜播种时期的温度限制因子不仅仅是低温,高温的限制作用可能更为严重。因此,建议在内蒙古呼和浩特地区进行牧草种子播种期的选择,要考虑到高温对种子萌发及成苗的影响。对内蒙古其他地区,也可根据当地气温测定值,利用预测公式进行估算不同时间的播层温度,以确定牧草最佳播种时期。
The effects of temperature and soil temperature in Inner Mongolia on sowing date selection were studied. Through the determination and study of temperature and soil temperature at different soil layers from April to August in Hohhot, Inner Mongolia, the relationship between temperature and temperature of different soil layers was established. The results showed that the limit of temperature for determining the appropriate sowing time of forage seed is not only the limitation of low temperature and high temperature but may be more serious. Therefore, it is recommended to select forage seed sowing period in Hohhot, Inner Mongolia, taking into account the effect of high temperature on seed germination and seedling emergence. In other areas of Inner Mongolia, the temperature of the sowing layer at different times can also be estimated according to the measured values of the local temperature, and the prediction formula can be used to determine the optimal sowing date of the grass.