绿洲区不同苜蓿品种生长特征分析

对5个紫花苜蓿（Medicago sativa）品种各茬的株高、干草产量、叶茎比以及营养成分进行分析。结果表明，各苜蓿品种株高和干草产量随着茬次的增加而降低，但品种间各茬次存在差异；生长季内3茬的苜蓿株高和干草产量WL 323和三得利表现最好。各品种中粗蛋白和粗脂肪含量第2、3茬高于第1茬，尤其是第2茬明显高于第1茬、第3茬，而粗纤维含量则相反；而品种间在主要营养物质含量方面则是三得利和WL 323表现最好。综合几项指标，三得利和WL 323在绿洲区表现特征最好，阿尔冈金表现不佳。从不同品种各茬次生产经济性状综合来看，第2茬的效应最好，可见，第2茬苜蓿是获得理想苜蓿干草的重要时期。

Growth characteristics of five alfalfa varieties in the oasis regions of Xinjiang Province

A field experiment was conducted to assess the height,hay production,leaf to stem ratio and nutrient components of five different varieties of alfalfa.This study showed that the height and hay yield of all alfalfa varieties decreased with the increase of cutting times,but they are different among five different varieties,in which the WL-323 and Sandili performed well during the growth period.The crude protein content and crude fat in the second and third cutting are higher than that in the first cutting for all varieties,especially those in the second cutting was significantly higher than that in the first and the third cutting,while the crude fiber content was showed an opposite trend when compared to the crude protein content and crude fat.The Sandili and WL-323 were the highest nutrient among the varieties.This study suggested that the Sandili and WL-323 performed best in the oasis regions while Algonquin performed poor,and the second cutting was the best period for harvesting high quality alfalfa.