|
Registro Completo |
|
Biblioteca(s): |
Embrapa Caprinos e Ovinos. |
|
Data corrente: |
12/07/2017 |
|
Data da última atualização: |
12/07/2017 |
|
Autoria: |
PARK, Y. W.; ANDERSON, M. J.; ASAY, K. H.; MAHONEY, A. W. |
|
Título: |
Predicting soluble nitrogen and fibrous fractions in crested wheatgrass with near-infrared-reflectance spectroscopy. |
|
Ano de publicação: |
1983 |
|
Fonte/Imprenta: |
Journal of Range Management, v. 36, n. 4, p. 529-533, Jul. 1983. |
|
DOI: |
10.2307/3897962 |
|
Idioma: |
Inglês |
|
Conteúdo: |
Abstract: A near-infrared-reflectance (IR) spectroscopic method was evaluated for potential usage in predicting soluble N, total N and some fibrous fractions in crested wheatgrass, Agropyron cristatum (L.) Gaertn., A. desertorum (Fisch. ex Link), et al. The correlation coefficients (r) between IR and total N, soluble N in 0.15N NaCl (N Sal), soluble N in 10% Burroughs Mineral Mixture solution (NBMM), neutral detergent fiber (NDF), acid detergent fiber (ADF), and acid detergent lignin (ADL) for 84 samples were 0.95, 0.90, 0.70, 0.90, 0.82, and 0.72, respectively. The IR technique provided a closer estimation of total N and N Sal than of NBMM in the calibration data. The mean solubility of N Sal was higher than that of NBMM. High variation occurred between the duplicate determinations of NBMM. The predictions on 30 unknown samples by the equation developed using 84 calibration samples for mean, SED (standard error of difference), and r were: total N, 1.01, 0.04, 0.98; N Sal, 0.43, 0.04, 0.90; NDF, 64.1, 0.96, 0.93, ADF, 36.2, 1.01, 0.91; and ADL, 5.24, 0.53, 0.62. Predictions of fibrous fractions were highly satisfactory even though the correlations were low. Correlations between chemical determinations of total N and N Sal, NBMM, NDF, ADF, ADL were 0.89, 0.53, -0.13, -0.33, -0.08, respectively. Significant differences (P<0.01) were found among crested wheatgrass species for all nitrogenous and fibrous fractions measured. Differences among clonal lines within species were also significant (P<0.05 or 0.01) for all determinations indicating that opportunities are available to improve the nutritional value of crested wheatgrass through selection. MenosAbstract: A near-infrared-reflectance (IR) spectroscopic method was evaluated for potential usage in predicting soluble N, total N and some fibrous fractions in crested wheatgrass, Agropyron cristatum (L.) Gaertn., A. desertorum (Fisch. ex Link), et al. The correlation coefficients (r) between IR and total N, soluble N in 0.15N NaCl (N Sal), soluble N in 10% Burroughs Mineral Mixture solution (NBMM), neutral detergent fiber (NDF), acid detergent fiber (ADF), and acid detergent lignin (ADL) for 84 samples were 0.95, 0.90, 0.70, 0.90, 0.82, and 0.72, respectively. The IR technique provided a closer estimation of total N and N Sal than of NBMM in the calibration data. The mean solubility of N Sal was higher than that of NBMM. High variation occurred between the duplicate determinations of NBMM. The predictions on 30 unknown samples by the equation developed using 84 calibration samples for mean, SED (standard error of difference), and r were: total N, 1.01, 0.04, 0.98; N Sal, 0.43, 0.04, 0.90; NDF, 64.1, 0.96, 0.93, ADF, 36.2, 1.01, 0.91; and ADL, 5.24, 0.53, 0.62. Predictions of fibrous fractions were highly satisfactory even though the correlations were low. Correlations between chemical determinations of total N and N Sal, NBMM, NDF, ADF, ADL were 0.89, 0.53, -0.13, -0.33, -0.08, respectively. Significant differences (P<0.01) were found among crested wheatgrass species for all nitrogenous and fibrous fractions measured. Differences among clonal lines within species were also... Mostrar Tudo |
|
Palavras-Chave: |
Cellulolysis; Infrared spectrophotometry; Wavelength. |
|
Thesaurus Nal: |
Forage; Infrared radiation; Minerals; Nitrogen; Solvents; Spectral analysis; Surfactants. |
|
Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
|
Marc: |
LEADER 02497naa a2200289 a 4500
001 2072538
005 2017-07-12
008 1983 bl uuuu u00u1 u #d
024 7 $a10.2307/3897962$2DOI
100 1 $aPARK, Y. W.
245 $aPredicting soluble nitrogen and fibrous fractions in crested wheatgrass with near-infrared-reflectance spectroscopy.
260 $c1983
520 $aAbstract: A near-infrared-reflectance (IR) spectroscopic method was evaluated for potential usage in predicting soluble N, total N and some fibrous fractions in crested wheatgrass, Agropyron cristatum (L.) Gaertn., A. desertorum (Fisch. ex Link), et al. The correlation coefficients (r) between IR and total N, soluble N in 0.15N NaCl (N Sal), soluble N in 10% Burroughs Mineral Mixture solution (NBMM), neutral detergent fiber (NDF), acid detergent fiber (ADF), and acid detergent lignin (ADL) for 84 samples were 0.95, 0.90, 0.70, 0.90, 0.82, and 0.72, respectively. The IR technique provided a closer estimation of total N and N Sal than of NBMM in the calibration data. The mean solubility of N Sal was higher than that of NBMM. High variation occurred between the duplicate determinations of NBMM. The predictions on 30 unknown samples by the equation developed using 84 calibration samples for mean, SED (standard error of difference), and r were: total N, 1.01, 0.04, 0.98; N Sal, 0.43, 0.04, 0.90; NDF, 64.1, 0.96, 0.93, ADF, 36.2, 1.01, 0.91; and ADL, 5.24, 0.53, 0.62. Predictions of fibrous fractions were highly satisfactory even though the correlations were low. Correlations between chemical determinations of total N and N Sal, NBMM, NDF, ADF, ADL were 0.89, 0.53, -0.13, -0.33, -0.08, respectively. Significant differences (P<0.01) were found among crested wheatgrass species for all nitrogenous and fibrous fractions measured. Differences among clonal lines within species were also significant (P<0.05 or 0.01) for all determinations indicating that opportunities are available to improve the nutritional value of crested wheatgrass through selection.
650 $aForage
650 $aInfrared radiation
650 $aMinerals
650 $aNitrogen
650 $aSolvents
650 $aSpectral analysis
650 $aSurfactants
653 $aCellulolysis
653 $aInfrared spectrophotometry
653 $aWavelength
700 1 $aANDERSON, M. J.
700 1 $aASAY, K. H.
700 1 $aMAHONEY, A. W.
773 $tJournal of Range Management$gv. 36, n. 4, p. 529-533, Jul. 1983.
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Caprinos e Ovinos (CNPC) |
|
