摘要
通过对哈尔滨地区近５０年各级强度初、终霜冻日分布的研究，得出终霜冻的年际间差异比初霜冻大，且有强度大的霜冻年际间差异大而弱霜冻的年际间差异小的趋势，同时文中给出了各级强度霜冻指标出现的保证率曲线及各级保证率出现的相应日期。
Based on the study on the distribution of the first and late different degree frost dates in the past fifty years, the results on frost study are developed. The results indicate that: (1) the annual discrepancy of late frost is more notable than that of first frost ; (2) the tedency exists that the annual discrepancy of intense frost is distinct and that of weak frost is rela- tively unremarkable. Moreover, the curves of frost indexes of different degrees and the re- sponding days of the guarantee rates in all degrees are given.
出处
《东北农业大学学报》
CAS
CSCD
2000年第2期129-136,共8页
Journal of Northeast Agricultural University
