陇东地区不同生态型冬小麦抗旱性研究与适宜品种的筛选

Evaluation of drought-resistance of different ecological types of dryland winter wheat and selection of suitable varieties in east Gansu

在不同的播前底墒下,应用抗旱指数法、隶属函数法、模糊综合评判法研究了14个不同生态类型旱地冬小麦品种的抗旱性。结果表明,随着底墒的增加,旱地冬小麦产量和水分利用效率显著提高,相同底墒下品种之间产量与水分利用效率差异显著,不同生态型冬小麦对播前底墒的反应明显不同。抗旱指数法、隶属函数法、模糊综合评判法均能较好地评价旱地冬小麦的抗旱性,其评价结果基本一致。参试品种从来源分析,抗旱性表现为:甘肃陇东>山西地区>北京地区>渭北旱塬>黄淮地区。

Under different conditions of soil water at planting stage （SW）, the drought-resistance of 14 dryland winter wheat varieties from different ecological regions was researched by the means of drought-resistance index, subordinate function and fuzzy synthetic judgment. It was shown that the yield and WUE of dryland winter wheat were improved significantly along with the increasing of SW. Under the same SW level, there were remarkable differences of yield and WUE among different varieties; and the effects of SW to different ecological types of winter wheat were also different. The results of drought-resistance index, subordinate function and fuzzy synthetic judgment were well consistent, and they could be used to evaluate the drought-resistance of dryland winter wheat. The drought-resistance of the tested varieties from different regions appeared as： east Gansu 〉Shanxi 〉Beijing〉Weibei highland 〉Huanghuai plain. Drought stress has an important significance to drought-resistance identification.