We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
黄淮海地区不同冬春性小麦抗冻能力及冻害指标 Ⅰ.隆冬期不同冬春性小麦抗冻能力比较
- Authors
慕臣英; 杨晓光; 杨 婕; 李克南; 郑冬晓
- Abstract
The relationships between mortality rate and low temperature for different cultivars of winter-spring wheat during mid-winter period were identified through two-year outdoor potting experiments and indoor manually controlled freezing experiments. We defined the lethally critical temperature and the density of antifreeze capability when the mortality rate reached 10%, 20% and 50% for different cultivars of winter-spring wheat during mid-winter period. The strong-winterness wheat (Yanda 1817 and Jing 411) showed the best freezing resistance and the 50%-lethal temperatures (LT50) of these two cultivars were -21.5 V and -21.2 V , respectively. The freezing resistance of winterness wheat and weak-winternes wheat were worse than that of strong-winterness wheat. The LT50 of winterness wheat cultivars Nongda 211 and Nongda 5363 were -21.1 V and -20.3 V , while that of weak-winterness wheat cultivars Zheng 366 and Ping’an 8 were -18.5 V and -18.4 , respectively. Springness wheat (Zheng 9023 and Yanzhan 4110) showed the worst freezing resistance, and the LT50 were -15.4 V and -14.7 V , respectively. When temperature declined to freezing injury occurred, mortality rate increment for weak-winterness wheat was the highest for each 1 V decrease. The mortality rates of weak-winterness wheat cultivars Zheng 366 and Ping’ an 8 increased by 16.8% and 25.8% , and that of winterness wheat cultivars Nongda 211 and Nongda 5363 increased by 14.7% and 18.9%. The mortality rate of strong-winterness wheat cultivars Yanda 1817 and Jing 411 increased by 15.4% and 13.1%, and that of springess wheat cultivars Zheng 9023 and Yanzhan 4110 increased by 13.8% and 15.1%. Comparatively, if tempe-rature decreased continuously after the occurrence of freezing injury, the weak-winterness wheat would suffer greater risk.
- Publication
Yingyong Shengtai Xuebao, 2015, Vol 26, Issue 10, p3119
- ISSN
1001-9332
- Publication type
Article