不同冬小麦品种产量和节水性状差异及对供水的反应

以24个冬小麦品种(系)为材料,在不同的灌水处理下,研究了产量、产量构成因素和抗旱指数的品种差异。结果表明,灌水处理间与品种间产量差异均极显著,灌水与品种互作差异显著。2水处理产量高于4水。石4185,冀 5579,石麦12等19个品种2水处理产量高于4水,多丰2000,师栾02-1,良星99等5个品种4水产量高于2水。分别以2水处理和4水处理下的产量作为水地产量计算抗旱指数,得出抗旱型,不抗旱型和中间型比例分别为4．2％, 29．2％,66．6％和20．8％,20．8％,58．4％。综合分析认为石麦12,冀5579和石新618等产量和节水综合性状较好的品种更适于节水栽培。

Responses of Grain Yield and Water Saving Traits to Water Regimes of Different Winter Wheat Cultivars

The yields, yield components and drought resistance index of 24 winter wheat cultivars were studied under different water regimes. The results indicated that yield was significantly different among irrigations and varieties. The interaction between irrigation and varieties was also different remarkably. On the average, yield of 2 irrigation regimes was higher than 4 irrigations. Nineteen of 24 cultivars, such as shi4185, ji5579 and shixin618, showed higher yield under 2 irrigation regimes than 4 irrigations, the others showed reversed. Based on the drought resistance index, the proportion of types of drought resistant, intermediate and drought susceptible was 4.2%, 66.6%, 29.2% and 20.8 % , 58.4% , 20.8% for 2 irrigations and 4 irrigations respectively. It was recommended that shimai12, Ji5579, Shixin618 were more suitable to water saving cultivation for their better yield performance and water saving traits.