论文部分内容阅读
利用东北三省25个农业气象观测站平均资料及176个气象站1961~2007年的逐日气象资料,对玉米全生育期及各主要玉米生育阶段的气候因子及综合气候适宜度进行计算分析。结果表明,自1961年以来,玉米各发育期对气候因子适宜程度不同,播种期-出苗期、出苗期-开花期、开花期-成熟期温度适宜度呈上升趋势,日照适宜度呈下降趋势;播种期-出苗期降水呈上升趋势,其余各生育期降水均为下降趋势。玉米全生育期降水、日照适宜度呈下降趋势,温度适宜度呈上升趋势,综合气候适宜度东北三省均呈下降趋势。各气候因子组合效果较好,玉米产量与各生育阶段的不同气候因子的适宜度相关性差异较大。
Based on the average data of 25 agrometeorological stations and the daily meteorological data of 176 meteorological stations from 1961 to 2007 in the three provinces of Northeast China, the climatic factors and the comprehensive climate suitability during the whole growth period of maize and the growth stages of maize were calculated. The results showed that the adaptability of climatic factors to maize at different developmental stages was different from 1961, and the temperature suitability at seeding-emergence, flowering, anthesis-flowering-maturity stages was increasing, while the sunlight suitability was decreasing. The sowing date - the precipitation at the seedling stage showed an upward trend, and the rest of the growing period showed a decreasing trend. Precipitation in maize during the whole growth period, sunshine suitability showed a downward trend, temperature suitability showed an upward trend, and overall climate suitability showed a downward trend in the three northeastern provinces. The combination of climatic factors is better, and the correlation between the yield of maize and the suitability of different climatic factors in each growth stage is quite different.