Addition of cell wall degrading enzyme and wheat bran on fermentation characteristics and in vitro gas production of ensiled rice straw
J.-M. Lv 1,   W.-L. Hu 1,   J.-X. Liu 1  
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College of Animal Sciences, Zhejiang University, 310029, Hangzhou, China
J.-X. Liu   

College of Animal Sciences, Zhejiang University, 310029, Hangzhou, China
Publication date: 2005-03-18
J. Anim. Feed Sci. 2005;14(2):365–372
A two way factorial experiment was designed to study the technique aspects of ensiling rice straw (RS) mixed with Strawzyme (an experimental preparation of cell-wall degrading enzymes) and wheat bran (WB). The WB was added at levels of 0, 3, 6 or 9% (fresh basis), respectively, and the RS was untreated (C-0, C-3, C-6 and C-9), or treated with Strawzyme at level of 1300 g/t DM (T-0, T-3, T-6 and T-9). Addition of WB improved the fermentation quality and nutritive value of RS silage. The pH value, percentage of ammonia N in total N and butyrate content were decreased, and lactate content and in vitro gas production (GP) increased with the increasing levels of WB. Enzyme treatment decreased the neutral detergent fibre, pH, ammonia-N and butyrate, and increased lactate and in vitro GP. There were significant interaction effects on pH, lactate and butyrate content between enzyme and WB. Therefore the silages in T-6 and T-9 showed good quality with lowest pH and highest lactate as well as no any butyrate. Proportion of ammonia N of total N was decreased by 37.9 or 15.5%, and the lactic acid was increased by 67.8 or 5.7%, respectively, when Strawzyme plus 6 or 9% WB was added. It can be concluded that combination of Strawzyme with WB was more effective in the improvement of RS silage quality than addition of WB alone.
Addition of Wheat Bran and/or Rice Straw on Chemical Composition andin vitroRumen Fermentation Characteristics of Ensiled Water Hyacinth
J. Li, J. Liu, Y. Wu, J. Ye
Journal of Applied Animal Research