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前言建国十二年以来,北方冬小麦区曾发生过五次較大范围的严重春霜冻害。为了預防或减少春季冻害,保証获得較高产量,在国内历年来不同地区的农业科学工作者进行了不少的研究;这些研究多系从农业技术措施,气候条件等方面观察分析冻害对小麦外部形态的为害程度,用作判断冻害的輕重。李揚汉等曾观察寒潮对小麦結实器官的影响,此外也有从生理学角度研究冻害对小麦一些生理过程的影响。陆生植物对于乾旱和严寒感应最銳敏的部份为茎尖的分生組織区;而小麦的頂端分
Preface Since the founding of the People’s Republic of China for 12 years, there have been five serious spring frost damage in the northern winter wheat area. In order to prevent or reduce the frost damage in spring and to ensure the high yield, a lot of researches have been done by agricultural scientists in different regions of China over the years. These researches mainly analyze and analyze the effects of frost damage on wheat external parts from the aspects of agricultural technical measures and climatic conditions, Morphological damage, used to determine the severity of frost damage. Li Yanghan et al. Observed the effect of cold wave on the wheat bearing organs. In addition, it also studied the effect of frost damage on some physiological processes of wheat from the physiological point of view. The most acute part of the terrestrial plants for drought and cold is the meristematic zone of the shoot tip; while the top of the wheat