Measurements of Chemical Compositions in Corn Stover and Wheat Straw by Near-Infrared Reflectance Spectroscopy

Abstract

Rapid, non-destructive methods for determining the biochemical composition of straw are crucial in ruminant diets. In this work, ground samples of corn stover (n = 156) and wheat straw (n = 135) were scanned using near-infrared spectroscopy (instrument NIRS DS2500). Samples were divided into two sets, with one set used for calibration (corn stover, n = 126; wheat straw, n = 108) and the remaining set used for validation (corn stover, n = 30; wheat straw, n = 27). Calibration models were developed utilizing modified partial least squares (MPLS) regression with internal cross validation. Concentrations of moisture, crude protein (CP), and neutral detergent fiber (NDF) were successfully predicted in corn stover, and CP and moisture were in wheat straw, but other nutritional components were not predicted accurately when using single-crop samples. All samples were then combined to form new calibration (n = 233) and validation (n = 58) sets comprised of both corn stover and wheat straw. For these combined samples, the CP, NDF, and ADF were predicted successfully; the coefficients of determination for calibration (RSQC) were 0.9625, 0.8349, and 0.8745, with ratios of prediction to deviation (RPD) of 6.872, 2.210, and 2.751, respectively. The acid detergent lignin (ADL) and moisture were classified as moderately useful, with RSQC values of 0.7939 (RPD = 2.259) and 0.8342 (RPD = 1.868), respectively. Although the prediction of hemicellulose was only useful for screening purposes (RSQC = 0.4388, RPD = 1.085), it was concluded that NIRS is a suitable technique to rapidly evaluate the nutritional value of forage crops.

Extrusion puffing as a pretreatment method to change the surface structure, physicochemical properties and in vitro protein digestibility of distillers dried grains with solubles

“…There was insufficient correlation between hemicellulose and NDF ( P > 0.05), whereas it exhibited a negative correlation with ADF ( P > 0.05). These findings contradict prior research, 43 highlighting the need for additional investigation.…”

Investigations on the Fusants From Wide Cross Between White-Rot Fungi and Saccharomyces cerevisiae Reveal Unknown Lignin Degradation Mechanism

“…Above all, it was interesting to find that the degrading ability of D1-P to acid-soluble lignin was significantly higher than WT. Although the content of acid-soluble lignin in softwood was very low, it was about 2%–10% in corn stalk ( Guo et al, 2021 ). The structure of ASL also resembles to that of acid-insoluble lignin, meaning the increased degradation ability of D1-P to ASL probably lead to increased degradation ability to ASIL.…”

Effect of Irrigation on the Content of Cellulose in Proso Millet Stalk (Panicum miliaceum L.) in Aydın/Turkey Conditions

“…The applications of NIRS in forage have long been investigated by, i.e. Ono et al (2003) Chen et al (2006), Huang et al (2010) and Guo et al (2021) and shows successful results for the analysis of the composition of plant materials.…”