W. Aufhammer et al., THE SUITABILITY OF GRAINS FROM CEREAL CRO PS WITH DIFFERENT N SUPPLY FOR BIOETHANOL PRODUCTION, Journal of agronomy and crop science, 177(3), 1996, pp. 185-196
The properties of grains of different small grain cereals, produced un
der increasing N-supply levels, for conversion into bioethanol were in
vestigated. Grain material of winterwheat, -rye and -triticale, two cu
ltivars each, was used. At two locations, field experiments comprising
several N-fertilization levels between 0 and 180kg N/ha were conducte
d. The main parameters analysed were the bioethanol output (1 bioethan
ol/dt grain dry matter) and the bioethanol yield (1 bioethanol/ha), bo
th under addition and without addition of technical enzymes. Furthermo
re, the falling numbers, the protein content and the autoamylolytic qu
otient (AAQ) were determined. AAQ means the autoamylolytic bioethanol
output related to the output under addition of technical enzymes. With
a rising N-supply, yields/ha and the protein contents of grain increa
sed differently. Combined with increasing protein contents, decreasing
bioethanol outputs were measured, particularly with wheat, to a small
er extent with triticale, and to an even lesser extent with rye. Only
with wheat were the AAQ-values significantly reduced as a consequence
of rising N-supply levels. In interaction with growing conditions, cul
tivars and N-levels, the bioethanol yields/ha of rye and triticale equ
alled or even surpassed the yields of wheat, particularly under autoam
ylolytic-conversion processing conditions.