可照时数
- 网络P.S.D
可照时数-
配合太阳视运动轨迹，用图解法或数值计算法即可求出相应点的实际日出、日落时间和可照时数。
Therefore , it is possible to obtain the sunrise time and the day length of any point in the shading region graphically or numerically , with the apparent motion locus of the sun and the above calculation of the corresponding point .
-
结果表明，两品种感光性较强，播种-抽穗期日数可由播种期的可照时数和积温拟合。
The number of days from sowing stage to heading stage could be determined by the sunlight hours and accumulated temperature during growing period .