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

scholarly journals ENVIRONMENTAL ASSESSMENT OF LIVESTOCK FARMS IN RUSSIA

2018 ◽  
Author(s):  
Natalia KOZLOVA ◽  
Aleksandr BRIUKHANOV ◽  
Eduard VASILEV ◽  
Ekaterina SHALAVINA
Keyword(s):  
Dairy Cows ◽  
Nitrogen Use Efficiency ◽  
Hazardous Substances ◽  
Mineral Fertilizers ◽  
Leningrad Region ◽  
Nitrogen Use ◽  
Limit Values ◽  
Organic Fertilisers ◽  
Use Efficiency ◽  
Livestock Farms

The paper focuses on quantitative assessment of nitrogen flows in a livestock farm under transition to best available techniques BAT system in Russia. Comparative analysis of quantitative estimates of ammonia emissions from housing for dairy cows, fattening pigs, farrowing sows and laying hens was conducted using available literature data and information obtained through a survey of pilot livestock farms in Leningrad Region. Ammonia emission data for existing Russian enterprises were found in the range of BREF emission levels associated with BAT. The nitrogen farm-gate balance was calculated for the farm with 810 dairy cows, 2600 ha of agricultural land and milk yield of 22 kg/day. The nitrogen surplus was 48.3 kg/ha, which was below the limit values and indicated the possibility to increase the application amount of nitrogen fertilisers, however, nitrogen use efficiency of 0.21 was significantly below the European average. The viability of manure storage and spreading techniques recommended by European BREF, namely compost heaps covering and immediate incorporation of organic fertilisers after spreading, was estimated for this farm. The calculated values of total nitrogen losses are reduced by 20%; the saving of mineral fertilizers owing to higher nitrogen content in applied organic fertilisers can be 18 t / year. For the rough assessment of technologies on the initial stage of Russian reference books creation it is practicable to use the data from EU BREF on intensive rearing of pigs and poultry. When farms are assessed on the stage of integrated permits issue, it is feasible to use the measured air concentrations of hazardous substances along with the estimation of the whole-farm environmental impact by nitrogen use efficiency. For such estimates to be applied in Russia, the data needs to be collected and systematised for different categories of farms and for different climatic regions.

scholarly journals Performance and nitrogen use efficiency in mid-lactation dairy cows fed timothy cut in the afternoon or morning

2016 ◽  
Vol 99 (7) ◽  
pp. 5445-5460 ◽  
Author(s):  
A.F. Brito ◽  
G.F. Tremblay ◽  
A. Bertrand ◽  
Y. Castonguay ◽  
G. Bélanger ◽  
...  
Keyword(s):  
Dairy Cows ◽  
Nitrogen Use Efficiency ◽  
Nitrogen Use ◽  
Use Efficiency

scholarly journals Potential of milk mid-infrared spectra to predict nitrogen use efficiency of individual dairy cows in early lactation

2020 ◽  
Vol 103 (5) ◽  
pp. 4435-4445 ◽  
Author(s):  
C. Grelet ◽  
E. Froidmont ◽  
L. Foldager ◽  
M. Salavati ◽  
M. Hostens ◽  
...  
Keyword(s):  
Dairy Cows ◽  
Infrared Spectra ◽  
Nitrogen Use Efficiency ◽  
Early Lactation ◽  
Nitrogen Use ◽  
Mid Infrared ◽  
Use Efficiency

scholarly journals Nitrogen isotopic fractionation as a biomarker for nitrogen use efficiency in ruminants: a meta-analysis

animal ◽  
2018 ◽  
Vol 12 (9) ◽  
pp. 1827-1837 ◽  
Author(s):  
G. Cantalapiedra-Hijar ◽  
R.J. Dewhurst ◽  
L. Cheng ◽  
A.R.J. Cabrita ◽  
A.J.M. Fonseca ◽  
...  
Keyword(s):  
Nitrogen Use Efficiency ◽  
Meta Analysis ◽  
Isotopic Fractionation ◽  
Nitrogen Use ◽  
Use Efficiency

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

scholarly journals Carbohydrate-rich supplements can improve nitrogen use efficiency and mitigate nitrogenous gas emissions from the excreta of dairy cows grazing temperate grass

animal ◽  
2020 ◽  
Vol 14 (6) ◽  
pp. 1184-1195 ◽  
Author(s):  
J.G.R. Almeida ◽  
A.C. Dall-Orsoletta ◽  
M.M. Oziemblowski ◽  
G.M. Michelon ◽  
C. Bayer ◽  
...  
Keyword(s):  
Dairy Cows ◽  
Nitrogen Use Efficiency ◽  
Nitrogen Use ◽  
Gas Emissions ◽  
Use Efficiency
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