Based on investigations, researches and scientific experiments, the cool injury index and frostindex to crops that fit the fact of heilongjiang Province are analyzed and obtained.
在调查研究和科学实验的基础上，分析出符合黑龙江省实际的农作物冷害指标和霜冻指标。
2
The frost injury index and advection cold injury index of tropical herbage and the hot injury index of temperate herbage are found.
分别找到了热带牧草的霜冻指标、平流寒害指标以及温带牧草的热害指标。
3
In the seasonal frost regions, more attention is often paid to frost heave index in the aspect of prevention and cure of roadbed frost damage.