不同春小麦品种产量、品质与氮利用效率对节水控氮栽培模式的响应差异OA

Four representative spring wheat(Triticum aestivum L.)cultivars in Wuwei City,Gansu Province,were selected as experi-mental materials,and three water and nitrogen combination treatments were established,including conventional irrigation and conven-tional nitrogen application(irrigation amount of 180 mm,urea application rate of 240 kg/hm2),drip irrigation with water-saving and conventional nitrogen application(irrigation amount of 120 mm,urea application rate of 240 kg/hm2),and drip irrigation with water-saving and nitrogen-controlled application(irrigation amount of 120 mm,urea application rate of 168 kg/hm2).The response differenc-es of yield,quality,population growth indicators,and nitrogen use efficiency of spring wheat to water-saving and nitrogen-controlled cultivation models were investigated.The results showed that water and nitrogen treatment,cultivar,and their interaction significantly affected spring wheat yield and quality(P<0.05).Compared with conventional irrigation,drip irrigation with water-saving significant-ly increased dry matter accumulation of spring wheat.Under the drip irrigation with water-saving and conventional nitrogen application treatment,the yield of Zhongmai 895 increased by 13.2%,representing the highest yield improvement among all cultivars.Controlled nitrogen fertilization significantly improved key quality indicators.There were significant differences in the response of varieties to wa-ter and nitrogen combinations.The strong-gluten cultivar Ningchun 50 achieved the best quality under drip irrigation with water-sav-ing and controlled nitrogen treatment,while maintaining good yield stability.The medium-gluten cultivar Zhongmai 895 exhibited the best yield and quality coordination under the drip irrigation with water-saving and conventional nitrogen application treatment.Pearson correlation analysis indicated that leaf area index,leaf SPAD value,and dry matter accumulation were significantly positively correlat-ed with yield and quality(P<0.05).It was recommended to precisely match cultivars with water nitrogen combinations based on culti-vation objectives to promote water efficient and high productivity cultivation of spring wheat in arid regions.