紫花苜蓿与鸭茅混播效应初探

[目的]探讨紫花苜蓿与鸭茅混播效应以及最佳混播比例。[方法]设5个处理组,每个处理组紫花苜蓿与鸭茅的混播比例不同。测定混播后各个处理组混播草地的产量,相总生物量以及紫花苜蓿与鸭茅在混播草地的竞争率。[结果]处理A3组的总产量最高,为4 827.67 kg/hm2,与其他处理组差异显著（P〈0.05）,且与处理A1组差异极显著（P〈0.01）。3个混播处理组的RYT值均大于1,2种草能够互补共存。在混播草地中,紫花苜蓿的竞争力强于鸭茅,在竞争中占有优势。[结论]为进一步研究紫花苜蓿与鸭茅混播草地以及建立高产优质的人工混播草地提供了依据。

Mixed Sowing Effects of Alfalfa and Orchard Grass on Forage Yield and Interspecific Competition

[Objective] To explore the mixed sowing effects and optimal mixed ratio of alfalfa and orchard grass.[Method]The alfalfa and orchard grass were sowed at different ratios(1∶0,3∶1,1∶1,1∶3 and 0∶1).They were grouped and named as CK1,A1,A2,A3 and CK2,respectively.The forage yield,relative yield total(RYT) and the competition rate of alfalfa and orchard grass in each group were determined,respectively.[Result]In the A3 treatment group,the total forage yield was the highest(4 827.67 kg/hm2) and significantly different from that of other treatment groups(P<0.01).In every mixed treatment group,the RYT was higher than 1,and the alfalfa was more competitive than the orchard grass in the mixed-seeding grassland.[Conclusion]Our studies may provide a basis for the establishment of artificial mixed-seeding grassland which has high yield and quality.