【摘要】 干旱是影响旱作区玉米产量的主要因素之一，而选择抗旱品种是保障玉米产量的有效措施。选取13个玉米品种在陇中半干旱区进行了抗旱玉米品种筛选试验，测定干旱胁迫和补灌条件下各玉米品种农艺性状、叶片整齐度、SPAD值、干物质积累量、水分利用效率、折合产量及其构成因素等指标，以产量为基准计算抗旱系数和抗旱指数，评价不同玉米品种的抗旱性。结果表明：中种8号、先玉335、晋单81号、吉祥1号抗旱指数高，分别为1.25、1.18、1.23、1.14，说明这4个品种抗旱能力较强，且在干旱胁迫后平均折合产量较高，分别为6 682.35、6 310.20、6 438.40、6 339.60 kg/hm~2，较对照品种郑单958分别增产10.55%、6.51%、4.88%、4.39%，可作为适宜在陇中半干旱区种植的抗旱玉米品种在生产上加以推广应用。更多还原

【Abstract】 Drought is one of the main factors affecting maize yield in dry farming areas,and selecting drought-resistant varieties is an effective measure to ensure maize yield. 13 maize varieties were selected to screen drought-resistant maize varieties in the Semi-arid Area of Central Gansu,and the agronomic traits,leaf uniformity,SPAD value,dry matter accumulation,water use efficiency,equivalent yield and its constituent factors were used as the benchmark to calculate the drought resistance coefficient and drought resistance index to evaluate the drought resistance of different maize varieties. The results showed that Zhongzhong 8,Xianyu 335,Jindan 81 and Jixiang 1 had high drought resistance indix which was 1.25,1.18,1.23 and 1.14,respectively,indicating that these four varieties had strong drought resistance,and the average drought resistance after drought stress The equivalent yields were 6 682.35,6 310.20,6 438.40,6 339.60 kg/hm~2,respectively,which were 10.55%,6.51%,4.88%,and4.39% higher than that of the control variety Zhengdan 958,respectively. It can be popularized and applied in production as a drought-resistant maize variety suitable for planting in the Semi-arid Area of Central Gansu.更多还原