关键词: 草原学, 鸭茅, 干燥方法, 水溶性碳水化合物, 营养损失

Abstract: A study was conducted on how different times of harvesting and methods of drying the cocksfoot affect the nutriment of the hay. The result shows that: 1)As the grass grows, its contents of crude protein and crude ash decrease,while its neutral detergent fiber and acid detergent fiber increase.More importantly,the content of water soluble carbohydrate begins to rise continuously,reaching its climax at the grass flowering stage,until the seeding stage,when the content of water soluble carbohydrate declines rapidly.Different methods of drying the cocksfoot greatly affects its content of water coluble carbohydrate (P<0.01).The high so low WSC content by different drying methods is in the following order:stoving >stoving after sunning>sunning>air-dry.2)Different drying methods also cause the grass nutriment components to lose in various degrees.The loss of different nutriment components differs enormously between the different drying nethods,and the order of decline coincides with that of the WSC listed above.The loss of dry matter,crude protein,and nitrogen free extract are positively correlated to the loss of WSC content (P<0.01).The correlation coefficient is 0.8798,0.6404,and 0.6568,respectively.

Key words: Grassland science, Cocksfoot (Dactylis Glomerata L.), Drying method, Water soluble carbohydrate, Nutrition loss