Rapid Assessment of Mineral Concentration in Meadow Grasses by Near Infrared Reflectance Spectroscopy

A near infrared reflectance spectroscopy (NIRS) method for rapid determination of nitrogen, phosphorous and potassium in diverse meadow grasses was developed with a view towards utilizing this material for biogas production and organic fertilizer. NIRS spectra between 12,000 cm−1 and 4,000 cm−1 were used. When validated on samples from different years to those used for the calibration set, the NIRS prediction of nitrogen was considered moderately useful with R2 = 0.77, ratio of standard error of prediction to reference data range (RER) of 9.32 and ratio of standard error of prediction to standard deviation of reference data (RPD) of 2.33. Prediction of potassium was less accurate, with R2 = 0.77, RER of 6.56 and RPD of 1.45, whilst prediction of phosphorous was not considered accurate enough to be of any practical use. This work is of interest from the point of view of both the removal of excess nutrients from formerly intensively farmed areas and also for assessing the plant biomass suitability for conversion into carbon neutral energy through biogas production.

[1]  H. Møller,et al.  Ammonia Inhibition of Methanogenesis and Identification of Process Indicators during Anaerobic Digestion , 2008 .

[2]  D. Givens,et al.  The current and future role of near infrared reflectance spectroscopy in animal nutrition: a review* , 1999 .

[3]  D. F. Malley,et al.  Compositional Analysis of Cattle Manure During Composting Using a Field‐Portable Near‐Infrared Spectrometer , 2005 .

[4]  Monika Heiermann,et al.  Batch- and Semi-continuous Biogas Production from Different Grass Species , 2005 .

[5]  N. Ziadi,et al.  Mehlich 3 extractable nutrients as determined by near-infrared reflectance spectroscopy. , 2009 .

[6]  René Gislum,et al.  Quantification of nitrogen concentration in perennial ryegrass and red fescue using near-infrared reflectance spectroscopy (NIRS) and chemometrics , 2004 .

[7]  W. F. McClure,et al.  Near Infrared Technology for Precision Environmental Measurements: Part 1. Determination of Nitrogen in Green- and Dry-Grass Tissue , 2002 .

[8]  Yong He,et al.  Prediction of soil macronutrients content using near infrared spectroscopy , 2006, International Commission for Optics.

[9]  I. Zabalgogeazcoa,et al.  Use of near-infrared reflectance spectroscopy in predicting nitrogen, phosphorus and calcium contents in heterogeneous woody plant species , 2005, Analytical and bioanalytical chemistry.

[10]  S. Larsen,et al.  Effects of policy measures implemented in Denmark on nitrogen pollution of the aquatic environment , 2008 .

[11]  F. Intrigliolo,et al.  Estimation of plant nutritional status by Vis-NIR spectrophotometric analysis on orange leaves (Citrus sinensis (L) Osbeck cv Tarocco) , 2010 .

[12]  J. Goupy,et al.  Optimization of a nitrogen analyser based on the Dumas method , 2004 .

[13]  J. Siles,et al.  Impact of ammonia and sulphate concentration on thermophilic anaerobic digestion. , 2010, Bioresource technology.

[14]  I. Zabalgogeazcoa,et al.  Assessment of the potential of NIR spectroscopy for the estimation of nitrogen content in grasses from semiarid grasslands , 1999 .

[15]  T. Amon,et al.  Bioenergy from permanent grassland--a review: 2. Combustion. , 2009, Bioresource technology.

[16]  G. Bélanger,et al.  Predicting timothy mineral concentrations, dietary cation-anion difference, and grass tetany index by near-infrared reflectance spectroscopy. , 2009, Journal of dairy science.

[17]  T Amon,et al.  Bioenergy from permanent grassland--a review: 1. Biogas. , 2009, Bioresource technology.

[18]  A. Hopkins,et al.  Biodiversity and animal feed: future challenges for grassland production. Proceedings of the 22nd General Meeting of the European Grassland Federation, Uppsala, Sweden, 9-12 June 2008. , 2008 .

[19]  Awwa,et al.  Standard Methods for the examination of water and wastewater , 1999 .

[20]  N. Ziadi,et al.  Near‐Infrared Reflectance Spectroscopy Prediction of Soil Properties: Effects of Sample Cups and Preparation , 2009 .

[21]  D. Drost,et al.  Shoot Growth, Plant Tissue Elemental Composition, and Soil Salinity Following Irrigation of Alfalfa and Tall Fescue with High-Sulfate Waters , 1997 .