中亚热带区不同秋眠级紫花苜蓿品种生产性能比较

为评价不同秋眠强度紫花苜蓿品种在福建中亚热带生产性能,选择秋眠级数(FD)3、5、7、9.5的紫花苜蓿品种在福建延平、福建建阳进行品种比较试验,测定越夏率、年度产草量、产草量季节动态、营养成分,结果表明:秋眠级数为7的阿瑞博表现最优,越夏率为67%,在延平、建阳年度鲜草产量分别为4 7931kg/hm2、62 505kg/hm2,干草产量分别为12 373.2kg/hm2、13 344.8kg/hm2,初花期粗蛋白含量28.0%。秋眠级数为3的苜蓿王初花期粗蛋白含量最高(33.4%),但越夏率和产草量最低。秋眠级数为9.5的萨兰多在秋季保持较高的产草量,但越夏率和春夏季产草量均低于阿瑞博。选择春季生长迅速,耐旱、耐热的非秋眠品种是中亚热带区紫花苜蓿生产的关键。

Comparison on production of different fall dormancy Medicago sativa varieties in central subtropical region in China

In order to evaluate production of different fall-dormancy(FD)Medicago sativa varieties in central subtropical region of Fujian,four varieties,Alfalfa king(FD3),Sitel(FD5),Arriba(FD7),Salado(FD9.5) were selected to plant in Yanping and Jianyang in Fujian Province.The summer survival rate,annual yield,yield season dynamical,nutrient component were investigated.Results showed that Arriba with FD 7 ranked the best performance with summer survival rate of 67%,crude protein content in initial flowering stage of 28.0%,and its annual fresh yield in Yinping and Jianyang was 47 931 kg/hm2 and 62 505 kg/hm2,annual dry matter yield of 12 373.2 kg/hm2 and 13 344.8 kg/hm2,respectively.Alfalfa king with FD 3 had lowest annual yield and summer survival rate,although with high crude protein content of 33.4%.Salado had lower annual yield and summer survival rate than Arriba,although with good performance on yield in autumn season.It was recommended that no fall dormancy varieties of Medicago sativa with fast growing in spring season and high resistant to dry and hot climate should be selected to cultivate for good production in central subtropical region in China.