NDLI: Response to Nitrogen of Sweet Pearl Millet and Sweet Sorghum Grown for Ethanol in Eastern Canada

Content Provider	Springer Nature Link
Author	Thivierge, Marie ëlle Chantigny, Martin H. Bélanger, Gilles Seguin, Philippe Bertrand, Annick Vanasse, Anne
Copyright Year	2014
Abstract	Sweet pearl millet [Pennisetum glaucum (L.) R.BR.] and sweet sorghum [Sorghum bicolor (L.) Moench] are considered for ethanol production in eastern Canada, but their response to N fertilization is not well established. Our objectives were (i) to compare both species for dry matter (DM), water-soluble carbohydrate (WSC), and estimated ethanol yields and (ii) to determine their response to mineral N rate (0, 40, 80, 120, and 160 kg N ha$^{−1}$), (iii) mineral vs. organic N (liquid swine and dairy manures at 80 kg total N ha$^{−1}$), and (iv) single vs. split N application (80 kg ha$^{−1}$ mineral N). The two species were grown for 2 years on sandy loams in two ecozones (Mixedwood Plains [MWP] and Boreal Shield [BS]) with contrasting temperature regime. Both species responded similarly to mineral N fertilization, with maximum WSC yield at 86 kg N ha$^{−1}$ at MWP and 91 kg N ha$^{−1}$ at BS, and maximum DM yield at 121 kg N ha$^{−1}$ at MWP and 107 kg N ha$^{−1}$ at BS. Mineral N fertilization at 80 kg ha$^{−1}$ resulted in higher DM and WSC yields than the manures, which showed fertilizer N equivalences varying from 15 to 52 %. Splitting mineral N rate between seeding and the four-leaf stage did not improve yield compared to a single application. Sweet sorghum had higher averaged WSC concentration and yield than sweet pearl millet (249 vs. 134 g WSC kg$^{−1}$ DM; 3.41 vs. 2.02 Mg WSC ha$^{−1}$) and appears more promising for ethanol production in eastern Canada.
Starting Page	807
Ending Page	820
Page Count	14
File Format	PDF
ISSN	19391234
Journal	BioEnergy Research
Volume Number	8
Issue Number	2
e-ISSN	19391242
Language	English
Publisher	Springer US
Publisher Date	2014-11-25
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Sweet pearl millet Sweet sorghum Nitrogen fertilization Sugar-based ethanol Cattle slurry Pig slurry Plant Sciences Plant Genetics & Genomics Plant Breeding/Biotechnology Plant Ecology Wood Science & Technology
Content Type	Text
Resource Type	Article
Subject	Renewable Energy, Sustainability and the Environment Agronomy and Crop Science

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