Federal Republic of Germany energy and protein feeding standards for growing and fattening cattle

International audienc

Variations of net requirements for cattle growth with liveweight, liveweight gain, breed and sex

International audienc

Sheep excreta cause no positive priming of peat-derived CO₂ and N₂O emissions (vol 88, pg 282, 2015).

The authors regret Changes in Figs. 4 and 5 Fig. 4: Corrected cumulated N fluxes of each treatment over 21 days. Changes in the following paragraphs 3.5 Cumulative N2O N emissions ranged from 0.01 to 0.14 g N m−2 (21 days)−1… 3.6 The proportion of excreta N mineralized to N2O during 21 days was highest in the 15N urine treatment (1.17% ± 0.60%) and lowest in the 15N faeces treatment (0.12% ± 0.12%; Fig. 5a). In urine plus faeces treatments 0.66% (±0.25%; 14N faeces plus 15N urine) and 0.63% (±0.46%; 15N faeces plus 15N urine) of the added 15N was emitted as N2O which was in the range expected from a mixing model based on the results from separate application (0.81%). 3.7 The amount of soil N mineralized to N2O ranged from 0.005% ± 0.004% – 0.010% ± 0.006% (Fig. 5b). 3.10 DON export was three to six times higher than the gaseous nitrogen loss as N2O. 4.2 The source partitioning traced by isotopic label resulted in emission factors, which were in range of the default emission factor of IPCC (2006) of 2% of N as N2O from grazing animal excreta. Delete: This strong discrepancy in emission factors, however, is no contradiction. The authors would like to apologise for any inconvenience caused