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Prediction of chemical composition and energy value of hay by near-infrared reflectance spectroscopy (NIRS) = Napovedovanje kemične sestave in energijske vrednosti mrve z bližnjo infrardečo refleksijsko spektroskopijo (NIRS)Žnidaršič, Tomaž, zootehnika ; Verbič, Jože ; Babnik, Drago, 1958-Stooseminpetdesetim vzorcem mrve z znano kemično sestavo in in vitro določeno vsebnostjo neto energije za laktacijo (NEL) smo na vsakih 8 nm izmerili spektre reflektirane bližnje infrardeče svetlobe ... v valovnem območju med 1100 in 2500 nm. S pomočjo analize glavnih komponent smo razvili umeritvene enačbe za napovedovanje vsebnosti suhe snovi (SS), surovih beljakovin (SB), surove vlaknine (SVl), surovih maščob, pepela in NEL. Metoda NIRS je bila zelo dobra pri napovedovanju SB (R2 = 0,98), SVl (R2 = 0,95) in pepela (R2 = 0,94). Za surove maščobe in SS je bila značilna zmerna točnost (0,75 in 0,87). Z izjemo pepela so bila odstopanja od referenčnih metod primerljiva z odstopanji, ki jih lahko pričakujemo pri izvajanju istih referenčnih metod v različnih laboratorijih. Metoda NIRS je bila zelo dobra tudi pri napovedovanju in vitro ocenjene vsebnosti NEL (R2 = 0,89). Več kot 95 % vzorcev je ležalo znotraj sprejemljivih meja 0,3 MJ NEL kg-1 sušine (SS). Kljub neoptimalni porazdelitvi vzorcev, t.j. majhnemu številu vzorcev v razredih pod 4,4 in nad 5,6 MJ NEL kg-1 SS, odstopanja z NIRS ocenjenih vrednosti od referenčnih vrednosti niso bila povezana z vsebnostjo NEL. Sklenili smo, da je NIRS hitra in zanesljiva metoda za ocenjevanje kemične sestave in energijske vrednosti mrve.Source: Acta agriculturae Slovenica. - ISSN 1581-9175 (Letn. 86, št. 1, dec. 2005, Str. 17-25)Type of material - article, component partPublish date - 2005Language - englishCOBISS.SI-ID - 2077544
Author
Žnidaršič, Tomaž, zootehnika |
Verbič, Jože |
Babnik, Drago, 1958-
Topics
prehrana živali |
prežvekovalci |
mrva |
razgradljivost |
energijska vrednost |
spektroskopija |
NIRS |
animal nutrition |
ruminants |
hay |
degradability |
energy value |
spectroscopy |
NIRS
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Database name | Field | Year |
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Links to authors' personal bibliographies | Links to information on researchers in the SICRIS system |
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Žnidaršič, Tomaž, zootehnika | 22606 |
Verbič, Jože | 10035 |
Babnik, Drago, 1958- | 05658 |
Source: Personal bibliographies
and: SICRIS
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