作物霜冻与低温强度及冰核菌密度的关系

应用辐射型霜箱进行控制试验，研究玉米霜冻害程度与低温强度和冰核菌密度的关系。结果表明逻辑斯蒂克(logistic)方程只有在没有冰核菌或冰核菌密度很小的条件下才能描述霜冻与温度的关系，而理查兹(Richards)方程能够在各种冰核菌密度下很好地描述三者的关系。进而讨论了这种关系在确定霜冻指标，制作霜冻预报，选用防霜方法等方面的应用。

The Relationship Between Frost Injury, Low Temperature and Population of Ice Nucleation Active Bacteria

The relationship between frost injury , low temperature and population of icenucleation active bacteria on crop leaves are studied by means of radiation-cabinet.Theresults indicate that the Logistic equation can show the relationship between frost injuryand low temperature only under the conditions of a few or even no ice nucleation activebacteria. But Richards equation can describe well the relationship between these threefactors under various conditions of ice nucleation active bacteria. Furthermore,theapplications of this relationship to frost injury indexes , frost injury prediction,and frostpreventing method are discussed.