田间试验条件下,比较不同紫云英品种在湖北省3个典型双季稻生态区的生育期、产量以及养分积累量等特性,为稻田绿肥生产选择适宜紫云英品种提供依据.结果表明,不同稻作区各紫云英品种的生育期均表现为湘肥3号和弋江种短于宁波种和南昌种.同一试验点不同品种间鲜草产量存在差异,崇阳以宁波种最高,达38.27 t/hm2；浠水以湘肥3号最高,达22.78 t/hm2；枝江以南昌种最高,达46.92 t/hm2.不同稻作区各品种紫云英养分积累量存在差异,崇阳试验点宁波种和南昌种氮、磷及碳养分积累量较高；浠水试验点湘肥3号和弋江种各养分积累量较高；枝江试验点弋江种和南昌种各养分积累量较高.研究表明,综合考虑生育期、鲜草产量及各养分积累量等因素,鄂东南低山丘陵双季稻区适宜的紫云英品种为南昌种和宁波种,鄂东丘陵岗地双季稻区适宜的紫云英品种为湘肥3号和弋江种,江汉平原双季稻区适宜的紫云英品种为弋江种和南昌种.%The objective of this field experiment was to study the difference among the four varieties of Chinese milk vetch in the three double cropping rice areas, hoping to select the optimum variety for different areas. The results showed that the child-bearing period of Xiangfei and Yijiang were shorter than Ningbo and Nanchang in the three different areas. The fresh grass yield of different varieties in the same area were discrepancy, the yield of Ningbo were highest in Chongyang, arrived at 38. 27 t/hm2, the yield of Xiangfei were highest in Xishui, arrived at 22. 78 t/hm2, and the yield of Nanchang were highest in Zhijiang, arrived at 46. 92 t/hm . The nutrients accumulation were different in the three areas. The N, P, C accumulation of Ningbo and Nanchang were higher in Chongyang, the N, P, K, C accumulation of Xiangfei and Yijiang were higher in Xishui, and the N, P, K, C accumulation of Yijiang and Nanchang were higher in Zhijiang. In conclusion , taking the child-bearing period, the fresh grass yield, and the nutrients accumulation into consideration, Nanchang and Ningbo were the best variety in the Southeastern low mountain and hilly area, Xiangfei and Yijiang were the best variety in the eastern hilly area, Yijiang and Nanchang were the best variety in the Jianghan Plain.
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