李聚才 张龙 王川

摘要[目的]筛选出适合宁夏引黄灌区麦后复种高产优质的苜蓿新品种。[方法]引进北美高秋眠级苜蓿新品种在银川市西夏区进行麦后复种品比试验。[结果]参试品种WL712、WL656HQ、WL525HQ的鲜草产量和株高较高，而WL440HQ、WL525HQ、WL656HQ的平均茎粗较大。以粗蛋白（CP）和中性洗涤纤维（NDF）为主要参考指标，各参试品种均达到NY/T 1170—2006质量标准。[结论]在宁夏引黄灌区西夏区麦后复种高秋眠级紫花苜蓿是可行的，以WL525HQ、WL656HQ和WL712表现较为理想。

关键词 高秋眠级苜蓿；麦后复种；宁夏引黄灌区

中图分类号 S541 文献标识码 A 文章编号 0517-6611（2017）03-0113-04

Abstract[Objective] To screen out new highyield and goodquality alfalfa varieties for multiple cropping after wheat in the irrigation area of Ningxia from Yellow River. [Method] New high falldormancy alfalfa varieties were introduced from North American to conduct the variety comparison test of multiple cropping after wheat in Xixia District of Yinchuan City. [Result] The average fresh yield and plant height of test alfalfa varieties WL712， WL525HQ， WL656HQ were higher， and the average stem diameter of test alfalfa varieties WL440HQ， WL525HQ， WL656HQ were larger. Taking crude fat and NDF as main indices， all test alfalfa varieties achieved the quality standards of NY/T 1170-2006.[Conclusion] Multiple cropping of high falldormancy alfalfa after wheat in Xixia District of irrigation area of Ningxia from Yellow River was feasible. And the performance of test varieties WL525HQ， WL656HQ and WL712 were ideal.

Key words High falldormancy alfalfa；Multiple cropping after wheat；Irrigation area of Ningxia from Yellow River

寧夏引黄灌区是我国重要的粮食生产基地之一。长期以来，由于得天独厚的黄河水自流灌溉和良好的自然资源，宁夏引黄灌区在实现全自治区粮食供需平衡、自给有余的历史转变过程中做出了巨大的贡献[1]。近年来，由于国内粮食供需已基本趋于平衡，并出现结构性过剩，因此加快宁夏引黄灌区供给侧结构性改革将是今后一段时期内农业生产中的重要任务之一。

苜蓿（Medicago sativa）为多年生豆科牧草，其根系属于直根系，其主根长、侧根分布范围大，故其在改善土壤环境、固土护坡方面有天然的优势；同时，苜蓿又具有高产、优质、抗性好、耐刈割、分布广等优点，己经成为我国种植面积最大、利用非常广泛的一种饲料作物[2]。近年来，随着对苜蓿种植及其利用的深入研究，已经引进许多适宜热带、亚热带气候种植条件的高秋眠级新品种。苜蓿作为“牧草之王”，其種植区域已经由原来的北方逐步在多地扩展。……