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为了研究小麦在干旱胁迫时抗寒性的变化规律,选取黄淮麦区南片小麦品种11个;长江中下游麦区小麦品种1个,研究其在正常水分条件下以及干旱胁迫条件下抗寒性变化规律。结果表明:在干旱条件下,小麦在各生育期抗寒性较非干旱条件下均明显降低,越冬期减幅最大,平均为4.91℃,返青期最小,拔节期居中。在非干旱条件下,各生育期,半冬性品种的抗寒性较春性品种均具有一定的优势,品种间抗寒性差异明显,所有品种在越冬期的抗寒性较冬前均有所提升,越冬后抗寒性迅速下降。半冬性品种越冬期抗寒性增强明显,春性品种抗寒性也有一定提高。
In order to study the changes of the cold resistance of wheat under drought stress, eleven wheat cultivars in the southern part of the Huanghuai wheat area and one wheat cultivar in the wheat area in the middle and lower reaches of the Yangtze River were selected to study their cold resistance under normal water conditions and drought stress The law of change. The results showed that under drought conditions, the cold resistance of wheat in all growth stages was significantly lower than that in non-arid conditions, with the largest reduction in winter, with an average of 4.91 ℃ and the minimum turning-back period. Under non-drought conditions, the cold-tolerance of the semi-winter varieties at all growth stages and semi-winter varieties had some advantages compared with the spring varieties, and the cold resistance of all varieties was significantly different during the winter, Ascended, winter cold resistance decreased rapidly. Semi-winter varieties increased significantly overwinter cold resistance, cold resistance of spring varieties have also increased.