六枝特区气象因子与水稻产量关系的研究

利用六枝特区1988-2008年逐日的日照时数、降水、气温与水稻产量资料,采用对比、回归进行分析,结果显示:六枝特区的水稻产量在1988-1999年这一阶段与灌浆成熟期的日照时数成正相关,相关系数达0.79;2000-2008年水稻产量则是与拔节孕穗期和抽穗开花期的积温成正相关,相关系数分别为0.71和0.72.结果表明,六枝水稻产量在第一阶段主要取决于灌浆成熟期的日照时数,而第二阶段主要取决于拔节孕穗期与抽穗开花期积温.应根据气候的变化适时种植,确保拔节孕穗、抽穗开花处在气候高积温期.

The Relationship between Meteorological Factors and Rice Yield in Liuzhi Special Zone

The sunshine hours, precipitation, temperature and rice yield from 1988 to 2008 in Liuzhi zone were compared and analyzed to know the relationship between meteorological factors and rice yield. The results showed that there was a positive correlation between rice yield and sunshine hours at filling/ maturity stage during 1988-1999 and its correlation coefficient was up to 0.79, and there were a positive correlation between rice yield and accumulation temperature at jointing/booting stage, and heading/ flowering stage during 2000-2008 and their correlation coefficients were 0.71 and 0.72 respectively. The results showed that the rice yield mainly depends on sunshine hours at filling /maturity stage during 1988-1999 and the rice yield mainly depends on accumulation temperature at jointing/booting stage and heading/flowering stage in Liuzhi zone. Therefore, the planting time of rice should be rationally adjusted according to climatic variation to ensure the jointing/booting stage and heading/flowering stage of rice are during higher accumulation period in Liuzhi zone.