黔东南州生态气候条件对准两优527超级稻产量的影响

Effeccts of Ecological and Climatic Conditions on Super Rice Yields of Zhunliangyou 527 in Southeast Guizhou

以贵州省黔东南州16个气象观测站2005—2007年的气温、降水量、日照时数以及海拔高度、播种期作为主要生态气候因子，分析其对准两优527超级交杂水稻产量的影响。结果表明：准两优527最适宜在海拔480—750m的地区栽培，尤其是海拔620m上下地带容易获得高产；最适宜播种期为3月28日-4月7日，播种期每推迟10d，产量减少48．2～376．3kg／667m^2；最适宜积温条件为3200—3800℃·d，积温每增加100℃·d，产量减少8．32～140．43kg／667m^2；最适宜降水量条件为460～800mm，降水量每增加或减少100mm，产量减少7．41～338．36kg／667m^2；最适宜光照条件为620～730h，光照少于500h或多于900h，产量降低明显。

Based on the ecological and climatic data of the air temperature, precipitation, sunshine hours,altitude and sowing time in sixteen meteorological stations from 2005 to 2007 in the Southeast Guizhou, the effects of the ecological and climatic factors on the super rice yields of Zhunliangyou 527 were analyzed . The results showed that the most suitable areas were with the altitude from 480 to 750 m, especially the areas with altitude about 620m. The most suitable sowing time was from March 28 to April 7. The per unit area （mu, 667 square meter） yield reduced from 48.7 to 376. 3 kg if the sowing time was delayed by 10 days. The most suitable accumulated temperature was from 3200 to 3800℃. The per unit area （mu, 667 square meter） yield reduced from 8.32 to 140.43 kg if the accumulated temperature increased by 100℃. The most suitable precipitation was from 460 to 800 mm, and the per unit area （mu, 667 square meter） yield decreased by from 7.41 to 338.36 kg if the precipitation increased or decreased by 100mm. The most suitable sunshine hours was from 620 to 730 hours , the yields would markedly cut down when the sunshine hours were lower then 500 hours or higher then 900 hours.