气候变化背景下江西省早稻气候生产潜力变化研究

来源 :2009农业环境科学峰会 | 被引量 : 0次 | 上传用户:woshi254211
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  为了科学地评价气候条件变化对早稻生产的影响,采用了1971~2000年全省85站逐日的有关气象要素,按光合、光温和气候三级生产潜力的划分思路,构建气候生产潜力计算模式,以光合生产潜力、温度适宜度、水份适宜度为基本评价因子,计算全省1971~2000年逐年85站光合、光温和气候三级生产潜力,定量化评估气候条件变化对早稻生产影响,并对其进行了时空分布分析。结果表明:1)1971~2000年江西省早稻的光合呈略减趋势,而光温生产潜力则呈略增趋势,水份条件呈变差的趋势,致使早稻气候生产潜力总体呈减小趋势;2)赣北环鄱阳湖区、赣中和赣南中部地区的早稻气候生产潜力为全省的高值区,而赣东北和赣中西部低于早稻气候生产潜力相对较低;3)全省的热量条件总体尚好,各分区的早稻光温生产潜力占光合生产潜力的比例均在76%以上,热量条件的改善有利于早稻的生产;4)江西省早稻气候生产潜力不稳定性较大,赣南地区早稻生产气候稳定性最好,鄱阳湖区早稻平均气候生产潜力最大。并针对早稻气候生产条件的变化特点,提出了适应气候变化,保证早稻生产稳定增长的若干建议。
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