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近年来各地种植了粳型杂交水稻黎优57,较好地发挥了穗大粒多的产量优势。但是,杂交稻黎优57空秕率偏高,除自身因素外,与花期低温伤害有密切关系。为了摸清杂交稻黎优57花期低温伤害温度指标及机理,从1981年以来,开展了花期冷害生理的研究。试验材料与方法试材为粳型杂交稻黎优57。试验在田间进行,采取晚期分期种植法,使水稻花期与后期出现的自然低温相遇。再通过定花观察和室内解剖镜检分析。试验连续两年,都于5月30日、6月15日和6月25日分三期插秧,在水稻开花期每日标定100朵开放小花(除去弱势
In recent years, various types of japonica hybrid rice Liyou 57 have been planted in various places, giving a good yield advantage of large grains and spikes. However, the hybrid rice Liyou 57 had a high rate of empty rice, which was closely related to the cold damage of flowering in addition to its own factors. In order to find out the temperature index and mechanism of low temperature injury in hybrid rice Liyou 57, the physiological characteristics of anthesis was studied since 1981. Materials and Methods The test material was japonica hybrid rice Li You. The experiment was carried out in the field, and the late stage planting method was adopted to meet the natural low temperature appeared in the flowering stage of rice and later stage. Then through fixed flower observation and indoor anatomy analysis. The experiment for two consecutive years, are in May 30, June 15 and June 25 in three transplanted rice, flowering in the rice daily calibration of 100 open floret (remove the weaker