论文部分内容阅读
1989年—1991年,对汕优63等4个杂交稻组合在不同海拔的观察结果表明,再生稻的产量及其生育期与海拔有密切的关系,随着海拔的升高,生育期延长,产量下降。产量下降的原因,主要是有效地减少和结实率降低,其实质是有效积温不能满足再生稻生长的要求。通过分析,抽穗扬花期日平均温度稳定通过21.8C的终止期,可作为确定不同海拔再生稻安全齐穗期的气温指标。
From 1989 to 1991, the observation of four hybrid rice combinations at different altitudes in Shanyou 63 showed that the yield and its growth period of ratooning rice were closely related to the altitude. With the elevation increasing, the growth period of ratooning rice was prolonged, Production decline. The reasons for the decline in yield are mainly the effective reduction and the reduction of seed setting rate. The essence is that effective accumulated temperature can not meet the requirements of the growth of ratooning rice. Through analysis, the average daily temperature at heading and flowering steadily passed the termination of 21.8C, which could be used as the temperature index to determine the safe heading stage of regenerated rice at different altitudes.