影响贵州西部马铃薯产量的主要气候因子分析

以贵州西部1978～2008年马铃薯平均产量作参考数列,以马铃薯生长期（3～8月）≥5℃积温、平均温度、降水量、日照时数、日平均最高温度和日平均最低温度等气候因子做比较数列,用灰色关联度分析法和主成分分析法对影响贵州西部马铃薯产量的气候因子进行分析。结果表明,温度、水分、光照3个综合因素对马铃薯生产具有协同作用,在水分、光照充足的条件下,热量因子对马铃薯产量起着主要作用。灰色关联度分析和主成分分析2种评价方法均可作为评价贵州西部马铃薯产量的影响因子,二者的评价结果基本一致。

Analysis of Main Climatic Factors Affecting Potato Yields of Western Guizhou

The climatic factors affecting potato yields in western Guizhou were analyzed by using the way of grey correlation degree and principal component analysis.The average yield of potato from 1978 to 2008 in western Guizhou was used as the sequence of numbers for reference.And the climatic factors including accumulated temperature,average temperature,precipitation,sunshine hours,daily average maximum temperature and daily average minimum temperature of ≥5 ℃ from March to August of potato at growth stage were used as the series for comparison.The results showed that the three integrative factors including temperature,moisture and light had a synergistic effect on potato production.The heat factor played a leading role in potato production with abundant light and ample water supply.Gray correlation analysis and principal component analysis could be used to estimate the influence factors of potato yield in western Guizhou.Very good agreement was found between the evaluation results obtained by the above-mentioned two methods.