【摘要】 反应日长因子的播期和纬度,对紫金粳生育期的影响效应显著大于溫度效应。可见,紫金粳的感光性明显强于感温性。同时,紫金粳齐穗后具有光补偿点低,光饱和点较高,剑叶叶绿素(a+b)含量较丰富的特点。因而,不仅有利于对弱光的利用,而且灌浆结实期易获得较高的净同化率。因此,该品种较适宜于在长江流域稻区作为麦茬稻和双季后作稻栽培。更多还原

【Abstract】 The growth duration of ZiJin Keng rice variety is more sensitive to day length varying with latitude and sowing date than temperature. The results of measuring the flag leaves of Zijin Keng showed that the latter has ,a low light compensation point and a high light saturation point, as well as a high chlorophyll(a+b) content after the heading period. These characteristics may be favourable not only to the light utilization under weak light condition, but also to obtaining a high rate of net assimilation during the grain-filling period. Zijin Keng is, therefore, suitable to be chosen as the single crop in wheat-rice pattern, or the second crop in the double rice cropping system within the whole Yangtze River Valley.更多还原