摘要
[目的]研究粳稻品种在渝东北高温伏旱条件下的适应性。[方法]以中科8号和II优838为对照品种，对引进的14份粳稻品种进行比较试验。[结果]粳2、粳3、粳4和粳5这4个品种在当地生产上有一定的应用价值。[结论]生育期是影响品种适应性的关键性状，全生育期与II优838相当且具有一定产量优势的品种在该地区才具备生产和应用价值。
Abstract
Objective] The aim was to study the adaptability of different japonica rice varieties under the condition of high temperature and drought in the northeast of Chongqing.[Method] With Zhongke 8 and II you 838 as control varieties, the introduced 14 japonica rice varieties were compared.[Result] Jing 2, Jing 3, Jing 4 and Jing 5 had a certain application value in local production.[Conclusion] The growth period plays a decisive role for the japonica rice variety adaptability, high yied varieties, whose whole growth period are similar to II you 838, are suit-able for planting under the climate conditions in the northeast of Chongqing.
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