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中国农学通报 ›› 2011, Vol. 27 ›› Issue (30): 16-20.

所属专题: 玉米 农业气象

• 农学 农业基础科学 • 上一篇    下一篇

1951—2008年西辽河平原玉米气候生产潜力变化特征分析

梁怀宇 杨恒山 刘晶 李媛媛   

  • 收稿日期:2011-07-22 修回日期:2011-09-23 出版日期:2011-11-25 发布日期:2011-11-25
  • 基金资助:

    国家重点基础研究发展计划(973计划)项目

Analysis of Characteristics of the Change of Corn Climatic Potential Productivity in the Plain of the West-Liao River in 1951-2008

  • Received:2011-07-22 Revised:2011-09-23 Online:2011-11-25 Published:2011-11-25

摘要:

为了研究气候变化对西辽河平原玉米生产潜力的影响,采用机制法,对1951—2008年西辽河平原玉米光合生产潜力、光温生产潜力和气候生产潜力变化动态进行研究。结果表明,1951—2008年西辽河平原玉米光合生产潜力、光温生产潜力和气候生产潜力均呈双波型变化曲线,其中光合生产潜力总体呈下降趋势,在1981年发生突变下降;光温生产潜力呈上升趋势,在1978年突变减少,1997年突变增加;气候生产潜力总体上呈下降趋势,在1957年突变增加。自1951—2008年以来,光温和气候生产潜力的差值趋于增大,表明降水对玉米生产潜力的制约加强。

关键词: 城市土地, 城市土地, 湖南, 集约利用, 区域空间差异

Abstract:

To investigate the impact of climatic variation in potential maize productivity in the plain of the West-Liao River. By using mechanism method, the dynamic changes of photosynthetic productive potential, light-temperature potential productivity and climatic potential productivity were studied. The results indicated that: their change appeared a double wave pattern curves. Photosynthetic productive potential was down overall, and mutation declined in 1981, light-temperature potential productivity emerged the rise overall, mutation dropped in 1978 and mutated increased in 1997, climatic potential Productivity was fall overall, mutation increased in 1957. The difference of light-temperature potential productivity and climatic potential Productivity increased, it evidenced the constraints of precipitation to maize production increased in recent 58 years.