Annual Manure Yield and Nutrient Content of Animal Excrements

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Overview

Livestock farms can considerably improve their greenhouse gas balance by using animal excrements for biogas production. The greenhouse gas methane emitted by manure and slurry is now used to produce energy and no longer emitted into the air. Moreover, energy generation leads to extra revenue without reducing the dung’s fertilising abilities.[1]


Total Annual Yield

Total annual yield [kg/LSU/a] and percentage shares


 Total Wt. TS VS N
kg/a kg/a [%] kg/a [%] kg/a [%]
Cow 16,100 1850 11.6 1400 8.7 77 0.5
Pig 13,500 1130 8.4 900 6.7 102 0.8
Chicken (fresh droppings) 18,250 4020 22.0 3170 17.4 232 1.3
Chicken (dry droppings) 4,230 3390 80 2560 60 146 3.5


Total annual yield [kg/LSU/a] and percentage shares Nutritive ratio
(P2O5 = 1)

P2O5 K2O N P2O5 K2O
kg/a [%] kg/a [%]
Cow 34 0.2 84 0.5 2.3 1 2.5
Pig 56 0.4 35 0.3 1.8 1 0.6
Chicken (fresh droppings) 194 1.0 108 0.6 1.2 1 0.6
Chicken (dry droppings) 193 4.6 106 2.5 0.8 1 0.6

Table B4: Annual manure yield and nutrient content of cow, pig and chicken excrements; compiled from various sources[2]


Abbreviations

LSU = livestock unit (= 500 kg live weight)
TS = Total solids
VS = Volatile solids


Further Information


References

  1. ↑ SUSTAINGAS: http://www.sustaingas.eu/fileadmin/sustaingas/documents/handbook/SUSTAINGAS_handbook_EN.pdf
  2. ↑ Production and Utilization of Biogas in Rural Areas of Industrialized and Developing Countries, Schriftenreihe der gtz, No. 97, pp. 71-72; after: Rager, K. Th.: Abwassertechnische und wasserwirtschaftliche Probleme der Massentierhaltung; Darmstadt, FRG, 1971, p. 38
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