Slow Release Urea Nitrate with Starch Polymer Coating Technique for Fermentation and Rumen Digestibility In Vitro

This title has been presented on Thursday, December 14, 2023 at 14.20-14.30 GMT+7.

Abstract

This title has been presented on Thursday, December 14, 2023 at 14.20-14.30 GMT+7.

The present study aimed to evaluate the effect of urea-nitrate coated with starch on in vitro rumen fermentation parameters. The starch used were divided into two sources, i.e., sago starch and cassava starch. A randomized complete block design was utilized in this study, consisted of five treatments and four replications. The treatments were: T0 = control diet; T1 = T0 + uncoated urea; T2 = T0 + uncoated urea-nitrate; T3 = T0 + urea-nitrate coated with sago starch; T4 = urea-nitrate coated with cassava starch. The urea-nitrate supplementation with starch coating was set to enhance the dietary crude protein by 2% of the control diet. Results revealed that T4 treatments reduced in vitro ruminal ammonia concentration compared to T0, T1, T2, and T3 (P<0.05). However, other parameters such as rumen pH, volatile fatty acid concentration, microbial protein synthesis, dry matter digestibility, organic matter digestibility, total gas production, and methane production were similar among the treatments. In conclusion, the urea-nitrate supplementation with cassava starch coating is able to slow down the release of ammonia in the rumen in vitro.