解冻速率对作物霜冻害的影响  

EFFECTS OF THAWING RATE ON FROST INJURY OF CROPS

作　　者：何维勋[1] 冯玉香[1] 夏满强[1] 

机构地区：[1]中国农业科学院农业气象研究所,北京100081

出　　处：《应用气象学报》1993年第4期440-445,共6页Journal of Applied Meteorological Science

基　　金：国家自然科学基金

摘　　要：用人工霜箱研究霜冻危害.霜箱温度控制在-1—1℃,分别模拟解冻速率为0.3℃/10min 和1.6C/10min 时的辐射霜夜缓慢降温过程.结果表明霜冻危害程度受作物种类、冻结温度、结冰进程和解冻速率的影响.在某些条件下,缓慢解冻可能使受冻组织恢复,但在另一些条件下则不能.对于不同耐霜性的作物,防霜的着眼点应该是不相同的.The frost injury is studied by means of the artificial frost-box with the temperatureof—1—1℃.The slow radiative cooling process in the frost night are simulated with thethawing rates of 0.3℃/10min and 1.6℃/10min,respectively.It was shown that theseverity of frost injury is affected by variety of crop,freezing temperature,freezing pro-cess and thawing rate.Under some conditions the frozen tissue may be recovered bymeans of slow thaw,but,under otherwise conditions it may not.For the varieties ofcrops with different frost tolerance,the focus of attention to prevention of frost damageshould be distinct.

关 键 词：霜冻 作物 耐霜性 冻害 冷害 

分 类 号：S425[农业科学—植物保护]