TY - GEN
T1 - NDVI measurements as a predictor of Miscanthus × giganteus biomass
AU - Pena-Yewtukhiw, E. M.
AU - Grove, J. H.
AU - Griffin, C.
AU - Fetter, K.
PY - 2015
Y1 - 2015
N2 - Miscanthus × giganteus is important to biofuel production. Normalized difference vegetation index (NDVI) is useful in estimating vegetative biomass. The research objectives were to evaluate NDVI measurements, and their timing, as estimates of Miscanthus biomass and yield at harvest. Miscanthus was grown from 2010 through 2014 at five residual soil fertility levels resulting from annual applications of 0, 2.2, 4.5, 9.0, and 18.0 mg manure/ha from 2000 to 2005. The manure rates were laid out in a completely randomized design with eight replications. In 2014, a handheld Greenseeker™ (NTech Industries) sensor was used to determine NDVI from May 16 to June 25. Plant height was used as a proxy for biomass. Soil organic matter (SOM) and a suite of soil chemical properties related to soil fertility were determined. In 2014, SOM ranged from 27.9 to 47.1 g SOM/kg soil. Plant height/biomass differences due to residual fertility increased with time; taller plants resulted in greater NDVI values. Soil fertility did not affect NDVI prediction efficiency for Miscanthus height/biomass. Using a quadratic-plateau equation, NDVI data achieved saturation in late June, indicating that, from both practical (greatest spread in NDVI values) and statistical perspectives, early June was the best time to measure NDVI for yield prediction purposes.
AB - Miscanthus × giganteus is important to biofuel production. Normalized difference vegetation index (NDVI) is useful in estimating vegetative biomass. The research objectives were to evaluate NDVI measurements, and their timing, as estimates of Miscanthus biomass and yield at harvest. Miscanthus was grown from 2010 through 2014 at five residual soil fertility levels resulting from annual applications of 0, 2.2, 4.5, 9.0, and 18.0 mg manure/ha from 2000 to 2005. The manure rates were laid out in a completely randomized design with eight replications. In 2014, a handheld Greenseeker™ (NTech Industries) sensor was used to determine NDVI from May 16 to June 25. Plant height was used as a proxy for biomass. Soil organic matter (SOM) and a suite of soil chemical properties related to soil fertility were determined. In 2014, SOM ranged from 27.9 to 47.1 g SOM/kg soil. Plant height/biomass differences due to residual fertility increased with time; taller plants resulted in greater NDVI values. Soil fertility did not affect NDVI prediction efficiency for Miscanthus height/biomass. Using a quadratic-plateau equation, NDVI data achieved saturation in late June, indicating that, from both practical (greatest spread in NDVI values) and statistical perspectives, early June was the best time to measure NDVI for yield prediction purposes.
KW - Efficiency
KW - Growth
KW - Miscanthus × giganteus
KW - NDVI sensor
KW - Soil fertility
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U2 - 10.3920/978-90-8686-814-8_13
DO - 10.3920/978-90-8686-814-8_13
M3 - Conference contribution
AN - SCOPUS:84947250895
T3 - Precision Agriculture 2015 - Papers Presented at the 10th European Conference on Precision Agriculture, ECPA 2015
SP - 111
EP - 117
BT - Precision Agriculture 2015 - Papers Presented at the 10th European Conference on Precision Agriculture, ECPA 2015
A2 - Stafford, John V.
T2 - 10th European Conference on Precision Agriculture, ECPA 2015
Y2 - 12 July 2015 through 16 July 2015
ER -