Effect of dietary tannins on milk yield and composition, nitrogen partitioning and nitrogen use efficiency of lactating dairy cows: A meta‐analysis

2020 ◽  
Vol 104 (5) ◽  
pp. 1209-1218 ◽  
Author(s):  
Sophie Herremans ◽  
Frédéric Vanwindekens ◽  
Virginie Decruyenaere ◽  
Yves Beckers ◽  
Eric Froidmont
Keyword(s):  
Dairy Cows ◽  
Milk Yield ◽  
Nitrogen Use Efficiency ◽  
Meta Analysis ◽  
Nitrogen Partitioning ◽  
Nitrogen Use ◽  
Lactating Dairy Cows ◽  
Use Efficiency ◽  
Dietary Tannins

scholarly journals Effect of condensed tannins in rations of lactating dairy cows on production variables and nitrogen use efficiency

animal ◽  
2018 ◽  
Vol 12 (9) ◽  
pp. 1847-1855 ◽  
Author(s):  
K. Gerlach ◽  
M. Pries ◽  
E. Tholen ◽  
A.J. Schmithausen ◽  
W. Büscher ◽  
...  
Keyword(s):  
Dairy Cows ◽  
Nitrogen Use Efficiency ◽  
Condensed Tannins ◽  
Nitrogen Use ◽  
Lactating Dairy Cows ◽  
Use Efficiency

Development of mathematical models to predict calcium, magnesium and selenium excretion from lactating Holstein cows

2018 ◽  
Vol 58 (3) ◽  
pp. 489 ◽  
Author(s):  
K. Taylor ◽  
J. A. D. Ranga Niroshan Appuhamy ◽  
J. Dijkstra ◽  
E. Kebreab
Keyword(s):  
Mathematical Models ◽  
Dairy Cows ◽  
Protein Content ◽  
Milk Yield ◽  
Milk Fat ◽  
Meta Analysis ◽  
Model Development ◽  
Dietary Factors ◽  
Mineral Excretion ◽  
Lactating Dairy Cows

The aim of this study was to develop and evaluate mathematical models that predict mineral excretion, particularly calcium (Ca), magnesium (Mg) and selenium (Se), from lactating dairy cows. Mineral excretion can be affected by several dietary factors. A deficiency in Ca or Mg application to pasture, among other factors, can contribute to grass tetany or wheat pasture poisoning in cows, whereas an excess can cause runoff into water supplies. Manure application with high Se concentration can also result in runoff, causing the bioaccumulation of selenium in aquatic ecosystems, wetland habitats and estuaries, leading to toxic levels in fish. A database composed of studies relating to mineral utilisation in lactating dairy cows conducted after and including the year 2000 was compiled. A meta-analysis was conducted with the aim of creating multiple empirical equations to predict Ca, Mg and Se excretion from lactating dairy cows. Calcium intake, feed Ca content, milk yield, milk protein content and acid detergent fibre content in diet were positively and linearly related to Ca excretion. Dietary crude protein content and milk fat content were negatively related to Ca excretion. Magnesium intake, feed Mg content and milk yield were positively and linearly related to Mg excretion. Selenium content of diet and dry matter intake were linearly and positively related to Se excretion. Two sets of models were developed using or excluding the intake variable and both sets of models were evaluated with independent data originating from commercial herd or individual animals. In general, intake measurements improved prediction when evaluated with independent datasets (root mean square prediction error = 8% to 19% vs 14% to 26% of the average observed value). There were substantial mean biases, particularly those evaluated with data from a commercial farm, perhaps due to inaccurate feed intake measurements. Although there was generally good agreement between predicted and observed mineral excretion, model development and evaluation would benefit from an expanded database.

Meta-analysis of management-induced changes in nitrogen use efficiency of winter wheat in the North China Plain

2020 ◽  
Vol 251 ◽  
pp. 119632 ◽  
Author(s):  
Bing-Yang Liu ◽  
Xin Zhao ◽  
Shuai-Shuai Li ◽  
Xiong-Zhi Zhang ◽  
Ahmad Latif Virk ◽  
...  
Keyword(s):  
Winter Wheat ◽  
Nitrogen Use Efficiency ◽  
North China Plain ◽  
North China ◽  
Meta Analysis ◽  
Nitrogen Use ◽  
The North ◽  
The North China Plain ◽  
Use Efficiency ◽  
Induced Changes

Effects of increasing dietary protein supplies on milk yield, milk composition, and nitrogen use efficiency in lactating buffalo

2018 ◽  
Vol 50 (5) ◽  
pp. 1125-1130 ◽  
Author(s):  
Muhammad Naveed-ul-Haque ◽  
Muhammad Uzair Akhtar ◽  
Rizwan Munnawar ◽  
Saba Anwar ◽  
Anjum Khalique ◽  
...  
Keyword(s):  
Milk Yield ◽  
Nitrogen Use Efficiency ◽  
Dietary Protein ◽  
Milk Composition ◽  
Nitrogen Use ◽  
Use Efficiency

Technical note: Nitrogen isotopic fractionation can be used to predict nitrogen-use efficiency in dairy cows fed temperate pasture1

2013 ◽  
Vol 91 (12) ◽  
pp. 5785-5788 ◽  
Author(s):  
L. Cheng ◽  
A. J. Sheahan ◽  
S. J. Gibbs ◽  
A. G. Rius ◽  
J. K. Kay ◽  
...  
Keyword(s):  
Dairy Cows ◽  
Nitrogen Use Efficiency ◽  
Isotopic Fractionation ◽  
Technical Note ◽  
Nitrogen Use ◽  
Use Efficiency
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