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1·观察比较了超级杂交稻协优9308和高产杂交稻协优63的生理特性。
Physiological traits of super high yielding hybrid rice Xieyou 9308 and high yielding hybrid rice Xieyou 63 were compared.
2·协优9308在孕穗期和抽穗期比常规品种更易遭受低温冷害，不适宜作为双季稻的晚稻种植。
The variety Xieyou 9308 was easy to be injured by low temperature than conventional varieties and not suitable to be sowed as late rice.
3·在杂交稻汕优63和协优9308上的若虫数量与TN1上的相当，杂交稻的感虫性主要来源于其不育系亲本。
Number of nymphs on the hybrids Shanyou 63 and Xieyou 9308 was similar with that on TN1. The super-susceptibility in the hybrids originated from the susceptibility of its parent of the CMS lines.