4-Manure-management/4.1-Excretions/4.1.2-N-and-TAN-Excretions.md

@@ -32,8 +32,7 @@ The amount of TAN needed for the assessment of the emissions of N species from m
 
 If the value of X<sub>DXP</sub> is not known, it must be estimated. For this purpose, the quantity X<sub>DE</sub> (digestibility of energy, see Chapter [2.4.7](/2-Input-data/2.4-Animal-activity-and-performance-data/2.4.7-Digestibilites)) is used in the inventory. Since X<sub>DE</sub> is usually somewhat larger than X<sub>DXP</sub>, this results in a certain overestimation of the TAN quantity and thus also of the NH<sub>3</sub> emissions. For dairy cows the amount of TAN is calculated differently, see dairy cow chapter below.
 
-The relative TAN content x<sub>TAN</sub> of the excreta is defined as:
-![grafik](uploads/31570197124382a82d6408454472e972/grafik.png)
+The relative TAN content x<sub>TAN</sub> of the excreta is defined as: ![grafik](uploads/31570197124382a82d6408454472e972/grafik.png)
 
 ## <span dir="">Partitioning of N excretions between different housing systems and grazing</span>
 
@@ -61,8 +60,7 @@ The annual amount on N retained in weight gained is calculated as follows:
 
 The amount of N used for milk production ist proportional to the milk yield and milk protein content. Data on these input variables for dairy cows are described in Chapter [2.4.8](/2-Input-data/2.4-Animal-activity-and-performance-data/2.4.8-Milk-yield-and-milk-composition).
 
-![grafik](uploads/c0bb6d832bf19a4b616465123a77c660/grafik.png)
-<span dir="">The N requirement for pregnancy is calculated proportionally to the number of births per year. </span>[<span dir="">DLG (2005, 2014)</span>](/9%20Literature#dlg-deutsche-landwirtschaftsgesellschaft-ed-2005)<span dir=""> use the value 0.025 kg kg<sup>-1</sup> as the proportionality factor x<sub>N,offspring</sub>. This only represents the N requirement for the fetus. In the emission calculation model, however, with reference to </span>[<span dir="">GfE (2001)</span>](/9%20Literature#gfe-gesellschaft-f%C3%BCr-ern%C3%A4hrungsphysiologie-ausschuss-f%C3%BCr-bedarfsnormen-2001)<span dir="">, p. 47, equation (2.2.1), the N requirement for the development of the pregnant uterus is also taken into account. This results in a combined nitrogen requirement of x<sub>N, p</sub> = 0.0302 kg per kg of calf birth weight. As in </span>[<span dir="">DLG (2014)</span>](/9%20Literature#dlg-deutsche-landwirtschaftsgesellschaft-ed-2005)<span dir="">, p. 34, the birth weight is set at 45 kg. (For </span>[<span dir="">DLG, 2005</span>](/9%20Literature#dlg-deutsche-landwirtschaftsgesellschaft-ed-2005)<span dir="">, it can be derived from the N-balance calculations described there that the birth weight was assumed to be 45 kg.)</span>
+![grafik](uploads/c0bb6d832bf19a4b616465123a77c660/grafik.png) <span dir="">The N requirement for pregnancy is calculated proportionally to the number of births per year. </span>[<span dir="">DLG (2005, 2014)</span>](/9%20Literature#dlg-deutsche-landwirtschaftsgesellschaft-ed-2005)<span dir=""> use the value 0.025 kg kg<sup>-1</sup> as the proportionality factor x<sub>N,offspring</sub>. This only represents the N requirement for the fetus. In the emission calculation model, however, with reference to </span>[<span dir="">GfE (2001)</span>](/9%20Literature#gfe-gesellschaft-f%C3%BCr-ern%C3%A4hrungsphysiologie-ausschuss-f%C3%BCr-bedarfsnormen-2001)<span dir="">, p. 47, equation (2.2.1), the N requirement for the development of the pregnant uterus is also taken into account. This results in a combined nitrogen requirement of x<sub>N, p</sub> = 0.0302 kg per kg of calf birth weight. As in </span>[<span dir="">DLG (2014)</span>](/9%20Literature#dlg-deutsche-landwirtschaftsgesellschaft-ed-2005)<span dir="">, p. 34, the birth weight is set at 45 kg. (For </span>[<span dir="">DLG, 2005</span>](/9%20Literature#dlg-deutsche-landwirtschaftsgesellschaft-ed-2005)<span dir="">, it can be derived from the N-balance calculations described there that the birth weight was assumed to be 45 kg.)</span>
 
 ![grafik](uploads/7c90e58c189de306604f720f19d845f9/grafik.png)
 
@@ -273,3 +271,25 @@ and
 ![grafik](uploads/36d6976d4f394887bf8d17ffbbe11606/grafik.png)
 
 <span dir="">The amount of UAN in the amount of N excreted is calculated according to to the method describd </span>[<span dir="">above</span>](/4%20Manure%20management/4.1%20Excretions/4.1.2%20N%20and%20TAN-Excretions#tan-excretion)<span dir="">, see for example the UAN calculation for </span>[<span dir="">broilers</span>](/4%20Manure%20management/4.1%20Excretions/4.1.2%20N%20and%20TAN-Excretions#broilers)<span dir="">. For the digestibility of crude protein see Chapter </span>[<span dir="">2.4.7</span>](/2-Input-data/2.4-Animal-activity-and-performance-data/2.4.7-Digestibilites)<span dir="">.</span>
+
+# Other animals
+
+## Ostrich
+
+As IPCC (2006) does not provide an N excretion value for ostrich, the value from the danish inventory ([UNFCCC](https://git-dmz.thuenen.de/vos/emissionsagriculture2024/-/wikis/9%20Literature#unfccc-united-nations-framework-convention-on-climate-change-2020)) was adopted. Thus ostrich excrete 15.6 kg pl<sup>-1</sup> a<sup>-1 </sup>an<sup>-1</sup>. The UAN content of the N excretions is assumed to be 70 % (see [EMEP (2019)](/vos/emissionsagriculture2024/-/wikis/9%20Literature#emep-2019)-3B-31, Table 3.9, value for poultry adopted).
+
+## Rabbits
+
+The IPCC default N excretions for rabbit is 8.1 kg pl<sup>-1</sup> a<sup>-1</sup>, see IPCC (2006) 10.59, Table 10.19. This value is unrealistically high as it is in the order of magnitude ot the annual total of life weight gain.
+
+This total of weight gain can be calculated as follows (based on data given by LfL Bayern ([LFL Website](http://www.lfl.bayern.de/ilt/tierhaltung/kleintiere/023092/))): du­ra­tion of fattening period of 87 days, i.e. about four production cycles per year, and final live weigt of 3.0 kg per animal, leading to a total weight gain of 12 kg per place and year. Hence, the N excretions of rabbit have been estimated from the N balance:
+
+![grafik](uploads/df9b9658b725c56061fba9fada16efe8/grafik.png) In conservative manner, _Δw_<sub>round</sub> was simply set equal to the final live weight (see above). The content of crude protein of the feed, x<sub>XP,feed</sub>, was chosen to be 0.17 kg kg<sup>-1, </sup>cf. [Meissner website](http://www.meissner-widder-kaninchen.de/%20F_WERT_TAB1.html). The amount of feed (fresh matter) needed for animal weight gain  is 3.5 kg kg<sup>-1</sup> (LfL Bayern). According to DLG (2005), pg.12, _x_<sub>n,ret</sub>  is 0.03 kg kg<sup>-1</sup>. Using this data, the resulting N excretion is 0.8 kg pl<sup>-1</sup> a<sup>-1</sup>. The UAN content of the N excretions is assumed to be 60 %.
+
+## Deer
+
+According to DLG (2014)deer excrete 16 kg pl<sup>-1</sup> a<sup>-1 </sup>an<sup>-1</sup>. The UAN content of the N excretions is assumed to be 50 % (no value provided [EMEP (2019)](/9%20Literature#emep-2019)-3B-31, Table 3.9), the value of goats was adopted.
+
+## Fur animals
+
+IPCC (2006), Table 10.19 gives a default value for the N excretion of fur animals: 4.59 kg pl<sup>-1</sup> a<sup>-1 </sup>an<sup>-1</sup>. The UAN content of the N excretions is assumed to be 60 % ( [EMEP (2019)](/9%20Literature#emep-2019)-3B-31, Table 3.9).
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