Nutrient requirements of dairy cattle , Nutrient requirements of dairy cattle , مرکز فناوری اطلاعات و اطلاع رسانی کشاورزی

Nutrient requirements of dairy cattle

A variety of nutritional management strategies that reduce enteric methane (CH4) production are discussed. Strategies such as increasing the level of grain in the diet, inclusion of lipids and supplementation with ionophores (>24 ppm) are most likely to be implemented by farmers because there is a high probability that they reduce CH4 emissions in addition to improving production efficiency. Improved pasture management, replacing grass silage with maize silage and using legumes hold some promise for CH4 mitigation but as yet their impact is not sufficiently documented. Several new strategies including dietary supplementation with saponins and tannins, selection of yeast cultures and use of fibre-digesting enzymes may mitigate CH4, but these still require extensive research. Most of the studies on reductions in CH4 from ruminants due to diet management are short-term and focussed only on changes in enteric emissions. Future research must examine long-term sustainability of reductions in CH4 production and impacts on the entire farm greenhouse gas budget.

Nutritional management for enteric methane abatement: A review

https://cyberleninka.org/article/n/1199846.pdf

Agro-industrial lignocellulosic biomass a key to unlock the future bio-energy: A brief review

In this work, H2 production by anaerobic mixed cultures was reviewed. First, the different anaerobic microbial communities that have a direct relation with the generation or consumption of H2 are discussed. Then, the different methods used to inhibit the H2-consuming bacteria are analyzed (mainly in the methanogenesis phase) such as biokinetic control (low pH and short hydraulic retention time), heat-shock treatment and chemical inhibitors along with their advantages/disadvantages for their application on an industrial scale. After that, biochemical pathways of carbohydrate degradation to H2, organic acids and solvents are showed. Fourth, structure, diversity and dynamics of H2-producers communities are detailed. Later, the hydrogenase structure and activity is related with H2 production. Also, the causes for H2 production inhibition are analyzed along with strategies to avoid it. Finally, immobilized-cells systems are presented as a way to enhance H2 production.

Hydrogen production by fermentative consortia

Potential and challenges of tannins as an alternative to in-feed antibiotics for farm animal production.

Effects of supplementing condensed tannin extract on intake, digestion, ruminal fermentation, and milk production of lactating dairy cows.

Exogenous enzymes added to untreated or ammoniated rice straw : Effects on in vitro fermentation characteristics and degradability

https://digitalcommons.usu.edu/cgi/viewcontent.cgi?article=1136&context=advs_facpub

Enhancing in vitro degradation of alfalfa hay and corn silage using feed enzymes.

Assessment of the efficacy of varying experimental exogenous fibrolytic enzymes using in vitro fermentation characteristics

https://digitalcommons.usu.edu/cgi/viewcontent.cgi?article=1137&context=advs_facpub

Jong-Su Eun

Papers

Effects of supplementing condensed tannin extract on intake, digestion, ruminal fermentation, and milk production of lactating dairy cows.

Exogenous enzymes added to untreated or ammoniated rice straw : Effects on in vitro fermentation characteristics and degradability

Enhancing in vitro degradation of alfalfa hay and corn silage using feed enzymes.

Assessment of the efficacy of varying experimental exogenous fibrolytic enzymes using in vitro fermentation characteristics

Use of exogenous fibrolytic enzymes to enhance in vitro fermentation of alfalfa hay and corn silage.