长期以来,我省由于受大气环流的季节变化影响,受青藏高原气候规律差异和季候风活动异常的影响,以及在社会经济活动中忽视生态环境带来的不利影响,形成不同强度的多种自然灾害经常发生,从根本上制约着农业生产的发展。在农业生产的全过程中,人与自然灾害的斗争,可说是年年未能幸免,年年经受考验,年年积累经验,年年渡过难关。因而在农业发展史上,写下 For a long time, due to the seasonal changes of the atmospheric circulation in our province, influenced by the differences in the climate laws and monsoon activities in the Tibetan Plateau and the adverse effects of neglecting the ecological environment in the social and economic activities, a variety of natural Disasters often occur, fundamentally restricting the development of agricultural production. In the whole process of agricultural production, the struggle between mankind and natural disasters can be said to be spared every year, tested every year, and accumulated through the years, so that he can weather the difficulties every year. Thus in the history of agricultural development, write down