关键词： 气候   温度   降水   作物  

摘要： 本文统计分析了延安、武功、汉中3个不同类型地区建国40年来温度和降水的实际变化,计算出上述地区气候变化后热量和水分资源状况,以及对农业生产的可能影响,并提出相应对策。

关键词： Decline   correlation coefficient (r)   agriculture   Fluid Balance   water balance   growing season   wet season   rain   Rainfall   Niger  

摘要： Five-year moving averages of annual rainfall for 21 locations in Niger showed a decline in the annual rainfall after 1960. Correlation coefficients of the moving averages of monthly rainfall with annual rainfall showed significant correlations between the decline in the annual rainfall with decreased rainfall in August. Analysis of daily rainfall data for rainy season parameters of interest to agriculture suggested that from 1965 there was a significant decrease in the amount of rainfall and in the number of rainy days in the months of July and August, resulting in a decreased volume of rainfall for each rainstorm. In comparison to the period 1945-64, major shifts have occurred in the average dates of onset and ending of rains during 1965-88. The length of the growing season was reduced by 5-20 days across different locations in Niger. The standard deviation for the onset and ending of the rains as well as the length of the growing season has increased, implying that cropping has become more risky. Water balance calculations also demonstrated that the probability of rainfall exceeding potential evapotranspiration decreased during the growing season. The implications of these changes for agriculture in Niger are discussed using field data.

关键词： 山东   气候变化   农业  

摘要： 近十年来,山东气候有了明显的变化,主要是降水显著偏少,气温升高.本文提出了相应的农业对策,主要有:1.适当调整耕作制度、种植方式和作物布局.重点是根据水热资源等条件,调整好玉米种植面积,适当增加较耐旱又较高产的甘薯、谷子的面积.2.大力发展雨养农业和节水农业.重点是采取有效措施提高自然降水利用率和水的生产转换率.3.适当发展立体农业和生态农业.以充分利用土地、时间、空间及气候资源条件,减轻气象灾害.4.积极开展气象预测、监测和农业对策的科研、服务、应用工作.

关键词： 山西   农业发展   气候  

关键词： 气候变化   农业生产   技术对策  

关键词： 气候变化   农业生产   花溪地区  

关键词： 国际学术研讨会   气候变化   气候变动  

摘要： 由中国农学会、中国气象学会、北京农业大学、中国农业科学院共同筹办的“气候变化,自然灾害和农业对策”国际学术研讨会将于1993年5月26—29日在北京农业大学召开。这次会议得到了联合国粮农组织的支持。会议将交流有关气候变化对农业、林业、海面上

关键词： 气候变化   农业生产关系   适应性   气候变动   农业气候生产潜力   农业气候资源   农业资源  

摘要： 80年代以来形成的世界范围环境外交高潮中,全球气候变化问题占重要位置,受到国际社会的普遍关注。苏联学者在这方面也进行了大量工作。