【摘要】 采用盆栽试验研究不同水稻品种(系)在抽穗期对高温的响应,用盆栽和大田种植2种方式研究不同播期处理对水稻的抽穗期避热调控效果,在南京和如皋两地试验田研究不同的增施穗肥处理对水稻抽穗期的影响。结果表明:①在抽穗期高温处理试验中,16个参试水稻品种(系)中有2个品种(系)(Z2001和86优8)表现为耐高温,2个品种(农垦57和武香粳14号)表现为中耐,其余12个品种属高温敏感型;②不同播期处理对水稻抽穗期的调控效果明显,综合历年气象资料,在长江流域水稻生产中,为避免抽穗期高温危害,适播期宜安排在5月20日之后;③通过增加穗肥来延迟水稻抽穗时间的效果甚微。更多还原

【Abstract】 Abnormal high temperature at heading stage could cause yield loss in rice.To find out whether this could be avoided by selecting varieties(lines),changing sowing date and increasing fertilizer application at heading stage,experiments on varieties(lines) selection,sowing dates and fertilizer application were performed.Among sixteen rice varieties(lines),Z2001 and 86you8 exhibited high tolerance and Nongkeng 57 and Wuxiangjing 14 were moderately tolerant,while others were highly sensitive to heat.Heat harm to rice could be avoided effectively by changing sowing date which would be better after May 20 in the bank of Yangtze River.It was almost impossible to put off heading time by increasing fertilizer application in heading stage.更多还原