Abstract:

In order to study the degradation characteristics of four types of peanut straw in dairy cow rumens, the disappearance rates and effective degradability of dry matter (DM), crude protein (CP), neutral detergent fiber (NDF) and acid detergent fiber (ADF) were determined using the nylon-bag method. The results showed that the disappearance rate and effective degradability of DM at 72 h were the highest in the Shan G type of peanut straw (66.07% and 49.37%, respectively), while the values decreased successively from TJ to Quanhua No.7 and TI. CP disappearance rate and effective degradability followed similar trends. Shan G had the highest values (73.16% and 59.20%, respectively) at 72 h. The CP disappearance rate decreased successively from Quanhua No.7 to TJ and TI, while the CP effective degradability decreased successively from TJ to TI and Quanhua No.7. At 72 h, the disappearance rates of NDF and ADF of Quanhua No.7 were the highest and decreased successively from Shan G and TJ to TI. The effective degradability of NDF was the highest for Shan G and decreased successively from TI to Quanhua No.7 and TJ. The effective degradability of ADF was the highest for Quanhua No.7 and decreased successively from Shan G to TI and TJ. In conclusion, Shan G has the highest and TI has the lowest nutritional value among the four types of peanut straw tested for dairy cows.