Effect of DDGS manure on soil and plant: preliminary results of the greenhouse study
Date
2009-02-26
Authors
Benke, M.B.
Hao, X.
Janzen, H.H.
McAllister, T.A.
Caffyn, P.
Schoenau, J.J.
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Abstract
The use of dried distillers’ grains with solubles (DDGS) in feedlot cattle diets is increasing as the
bio-ethanol industry expands. Manure derived from dried distiller’s grain with solubles (DDGS)
fed cattle seem to have higher amounts of N and P than manure from regular grain fed cattle.
This study investigates how DDGS manure affects soil fertility and nutrient uptake by barley
grown in a controlled greenhouse environment. Both DDGS and regular manure were applied at
30, 60, 120 and 180 Mg ha-1 yr-1 to a sand soil. The results of the first 3 harvest cycles indicate
that both types of manure resulted in similar increase in plant total P content. However, soil TP
and available P concentrations in DDGS manure treatments were higher. Soil available in DDGS
treatments was twice as much of that in regular manure. Increase in soil TN and available N
contents was similar with both types of manure. Plant TN content did not seem to be influenced
by manure application. This study indicates that the main concern with the use of DDGS manure
is its high P solubility. However, no significant increase in soil available P was observed at a
manure rate of 30 Mg ha-1 yr-1.
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nitrogen, phosphorus, barley
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Part Of
Soils and Crops Workshop