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[目的]研究苜蓿刈割时期与产草量、蛋白质含量的关系。[方法]以6个不同的苜蓿品种为材料,于2002年刈割2次2、003年刈割4次2、004年刈割2次,每次刈割后测定苜蓿的产量、粗蛋白含量。[结果]1年刈割4次,6个苜蓿品种的粗蛋白含量均以第2茬最高,其次是第3茬,第1茬最低,其中苜蓿王和爱菲尼特平均粗蛋白含量最高,分别为22.95%和22.53%;干草产量均以第1茬最高,其次为第3茬和第4茬,第2茬最低。1年刈割1次,6个苜蓿品种播种当年的粗蛋白含量均高于第2年。6个苜蓿品种2003年、2004年干草总产量均高于2002年。[结论]1年刈割4次,苜蓿的粗蛋白含量以第2茬最高,干草产量以第1茬最高。
[Objective] The research aimed to study the relationship between alfalfa mowing date and grass yield and protein content. [Method] Six different alfalfa cultivars were used as materials to cut two times in 2002, four times in 2000 and two times in 2004. The yield and crude protein of alfalfa . [Result] The crude protein content of the six alfalfa cultivars was the highest in the second crop, followed by the third crop, the lowest in the first crop. The average crude protein content of alfalfa king and amrinite was the highest, 22.95% and 22.53% respectively. The hay yield was the highest in the first crop, followed by the third crop and the fourth crop, and the second crop was the lowest. The mowing time was 1 year and the crude protein content of the 6 alfalfa cultivars at sowing year was higher than the second year. Six alfalfa varieties The total hay output in 2003 and 2004 were both higher than in 2002. [Conclusion] The cutting of alfalfa was the highest in the second stubble and the highest in the first stubble.