近30年气候变化对黄土高原地区玉米生产潜力的影响

Impact of Climatic Variation in Maize PrOductivc Capacity in the Locss Platcau Arca in recent 30 years

应用黄土高原地区７２站６０～８０年代的气象资料，分析了气候变化对玉米生产潜力的影响。结果表明，虽然整个黄土高原８０年代年平均气温有变暖趋势，但影响玉米生长期内的温度并没有增高，反而有所降低，以致８０年代玉米的光温生产潜力均较６０、７０年代减少。由于降水变化的影响，除陕西省外，其它省区８０年代气候生产潜力均高于６０、７０年代。

In this paper，the impact of climatic variation capacity on maize productive capacity are analizedby use of the meteorological data of 72 stations in the Loess Plateau area for 30 years．The resultsshow that，inspite of the general climatic trend was getting warmer during 1980’s in this area，thetemperature within growing seasons did not go up but dropped a little．Thus，the light-temperatureproductive capacity of maize in 1980s was less than that in 1960’s or 1970’s Due to the influence ofthe change of precipitation，the climatic productive capacity in 1980’s was higher than that in 1960’s or1970’s for all parts in this area except for Shaanxi Province.