Abstract:

Abstract: A complete randomized block design was used in the experiment. The nutritional value of alfalfa, and correlation analysis were studied in this research. Several results were obtained from the experiment. (1) As cutting times of alfalfa increased, the plant height decreased, plant height of the top four alfalfa varieties was Sandili, Derby, Golden queen, Sitle, and plant height of which was more than 60 cm. (2) The 14 alfalfa varieties could survive safely the winter. Sitle has the highest dry matter yield (up to 16.14 t/hm2), next comes Golden queen, Sandili, Empress, ACAah. (3) The change of the same element varied with the rice variety, leaf-stem ratio of Affinity was the highest among the fourteen alfalfa varieties (up to 54.69%), the following is Multiking, Derby, Golden queen, Millennium, and the leaf-stem ratio of the first five varieties was above 50%; crude protein content of Multiking was the highest (up to 20.21%), the following is Affinity, Millennium, ACAah, Derby. (4) Dry matter yield had significant positive correlation with plant height(p<0.05), leaf stem ratio had extremely significant positive correlation with crude protein content and extremely significant negative correlation with crude fiber (p<0.01), so in breeding and introducing new alfalfa varieties, dry matter yield and nutritional value could be predicted in the field by plant height and leaf stem ratio, and we also could predict yield and nutritional value by measuring plant height and leaf stem ratio in the field.