【摘要】 对９０年代以来出现的几次冬季寒害给广东农业生产的严重影响进行了分析，指出冬季寒害是开发利用广东冬季气候资源、发展高产优质高效农业的主要威胁和障碍。在分析冬季寒害的基础上，提出了防御寒害的对策。更多还原

【Abstract】 Through investigation on the small lakes in the Basin of Lixia River in Jiangsu, the difference in temperature between water areas and their environments was analyzed. The denaturation and thermal transfer of air current over the water areas, the thermal efficiency of water and its influence on the near farmlands were dicussed. Besides, several models are established for estimating the extent and scope of thermal efficiency rising from water body with different scales.更多还原