期刊
BIOMASS & BIOENERGY
卷 91, 期 -, 页码 98-107出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.biombioe.2016.05.005
关键词
Miscanthus Keng; Clonal differences; Biomass yield; Establishment; Cellulose; Lignin; Nitrogen use efficiency
资金
- Purdue University College of Agriculture
- Sungrant Initiative [DE-FG36-08GO88073, 3TE162]
- USDA NIFA-AFRI (cenUSA) [2011-68005-30411]
- Mendel Biotechnology
Few studies have examined N management strategies to accelerate Miscanthus establishment. Our objectives were: (i) determine differences in biomass yield among various M. x giganteus genotypes as influenced by N management during establishment; (ii) quantify the impact of genotype and N management on biomass composition; and (iii) determine how M. x giganteus genotype and N management influence nitrogen use efficiency (NUE). Four M. x giganteus genotypes were planted near Schochoh, KY and Lafayette, IN in 2010. A two-year total N application of 150 kg ha(-1) was applied using various combinations of 50, 75, and 100 kg ha(-1) y(-1). Control N rates included 0 and 150 kg ha(-1) each year. Yield, composition, and NUE of the MS and IL clones were similar. Two-year cumulative yields of Nagara were higher than the other genotypes in KY, and the IL clone in IN. There was no response of yield to N on the silt loam soil in KY, whereas high biomass yields were achieved with 50 kg ha(-1) y(-1) of N on the sandy loam soil in IN. Yields of plots provided high N in Season 1 were similar to unfertilized control plots in Season 2 suggesting little N carryover from Season 1 to 2. Biomass fiber concentrations were not influenced by N-fertilization, but high leaf retention of the Nagara lines reduced biomass cellulose and lignin concentrations. Site-specific genotypic differences in NUE were observed. Annual N applications of 50 kg ha(-1) is recommended to enhanced Miscanthus yield during establishment on the coarse-textured soils. (C) 2016 Elsevier Ltd. All rights reserved.
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