选取近年来在陇中半干旱区种植表现较好的10个小麦品种(系)，对其产量、WUE、抗旱指数和农艺性状进行分析，以评价各品种(系)的抗旱性及最佳种植区域。结果表明，随着灌水量的增加，各参试品种(系)的株高均增加。陇中4号和陇中1号的倒伏面积较大，分别达32.6%、40.7%。产量以中麦175在灌水量3 000 m3/hm2处理下最高，为5 531.0 kg/hm2。经分析鉴定，抗旱指数3级的品种(系)有陇中5号、CA13012、200833-3和200917-2。综合产量、WUE、抗旱指数及倒伏面积，适合降水量350~550 mm区域种植的品种(系)为陇中4号、陇中5号、CA12003、陇育10号、200707-2-2，适合降水量350~650 mm区域种植的品种(系)为CA13012、200833-3、200917-2，适合降水量在450~650 mm区域种植的品种(系)为中麦175。

In this experiment， 10 wheat cultivars(lines) with good planting performance in the semi-arid area of central Gansu in recent years were selected to analyze the yield， WUE， drought-resistance index and related agronomic traits. The drought-resistance of each cultivar (lines) and the optimum planting area were evaluated. The results showed that the plant height of all tested wheat cultivars (lines) increased with the increase of irrigation amount. The lodging area of Longzhong 4 and Longzhong 1 reached 32.6% and 40.7%， respectively. The yield of Zhongmai 175 was the highest under the treatment of 3 000 m3/hm2 irrigation， which was 5 531.0 kg/hm2. Through analysis and identification， the cultivars(lines) with third level for drought resistance index including Longzhong 5， CA13012， 200833-3 and 200917-2.According to the comprehensive analysis for yield， WUE， drought-resistant index and lodging area， the cultivars (lines) suitable for planting in the area with rainfall of 350～550 mm were Longzhong 4， Longzhong 5， CA12003， Longyu 10 and 200707-2-2.The cultivars (lines) suitable for planting in the region with rainfall of 350～650 mm were CA13012， 200833-3 and 200917-2. The cultivars suitable for planting in the region with rainfall of 450～650 mm was Zhongmai 175.

S512.1

定西市农业科学研究院青年科研创新基金(2019YQ04)。