An investigation on the effect of maturity stage and variety on the quality of cereal forages

Li. Wang

Research output: ThesisMasters Thesis

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Abstract

Two groups of cereal forage crops, including various cultivars of barley, oats, triticale and wheat, were planted at different sites and harvested at boot, anthesis and milk stages respectively. The effects of maturity stage and variety on nutritive values and predicted digestibility were measured by near-infrared reflectance spectrophotometry (NIR). The effects of stage, variety and their interaction were significant (P<0.001) for samples collected at one site (78 samples), but only the effect of stage was significant (P<0.001) for samples from the other site (125 samples). For samples from the first site, the mean concentration of neutral detergent fibre (NDF) and acid detergent fibre (ADF) increased from boot to anthesis stage and then decreased from anthesis to milk stage; the crude protein (CP) content decreased significantly from boot to milk stage; and the mean predicted digestibilities declined significantly from boot to anthesis and then to milk. For samples from the second site, the mean concentration of NDF and ADF did not differ between boot and anthesis stage but increased significantly from anthesis to milk stage; the CP content decreased significantly from anthesis to milk stage; and the mean predicted digestibilities did not change from boot to anthesis and then decreased to milk. The predicted digestibilities in NIR were calibrated by R-P (Rumen fluid Pepsin method) and P-C (Pepsin Cellulase method) respectively, but differences were noticed between them. Therefore, the experiment was carried out to measure the effect of method on the predicted digestibility by R-P and P-C method for each group respectively.
Original languageEnglish
QualificationMaster of Philosophy
Awarding Institution
  • Charles Sturt University
Supervisors/Advisors
  • Friend, Michael, Co-Supervisor
  • Wilkins, John, Co-Supervisor
  • Knott, Stephanie, Co-Supervisor
  • Piltz, John, Co-Supervisor
Award date01 Aug 2010
Place of PublicationAustralia
Publisher
Publication statusPublished - 2010

Fingerprint

maturity stage
forage
flowering
milk
digestibility
pepsin
acid detergent fiber
endo-1,4-beta-glucanase
sampling
neutral detergent fiber
reflectance
spectroscopy
crude protein
protein content
methodology
forage crops
triticale
rumen fluids
grain crops
oats

Cite this

Wang, Li.. / An investigation on the effect of maturity stage and variety on the quality of cereal forages. Australia : Charles Sturt University, 2010. 143 p.
@phdthesis{440b8ac29f904140bf9737899279280a,
title = "An investigation on the effect of maturity stage and variety on the quality of cereal forages",
abstract = "Two groups of cereal forage crops, including various cultivars of barley, oats, triticale and wheat, were planted at different sites and harvested at boot, anthesis and milk stages respectively. The effects of maturity stage and variety on nutritive values and predicted digestibility were measured by near-infrared reflectance spectrophotometry (NIR). The effects of stage, variety and their interaction were significant (P<0.001) for samples collected at one site (78 samples), but only the effect of stage was significant (P<0.001) for samples from the other site (125 samples). For samples from the first site, the mean concentration of neutral detergent fibre (NDF) and acid detergent fibre (ADF) increased from boot to anthesis stage and then decreased from anthesis to milk stage; the crude protein (CP) content decreased significantly from boot to milk stage; and the mean predicted digestibilities declined significantly from boot to anthesis and then to milk. For samples from the second site, the mean concentration of NDF and ADF did not differ between boot and anthesis stage but increased significantly from anthesis to milk stage; the CP content decreased significantly from anthesis to milk stage; and the mean predicted digestibilities did not change from boot to anthesis and then decreased to milk. The predicted digestibilities in NIR were calibrated by R-P (Rumen fluid Pepsin method) and P-C (Pepsin Cellulase method) respectively, but differences were noticed between them. Therefore, the experiment was carried out to measure the effect of method on the predicted digestibility by R-P and P-C method for each group respectively.",
author = "Li. Wang",
year = "2010",
language = "English",
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Wang, L 2010, 'An investigation on the effect of maturity stage and variety on the quality of cereal forages', Master of Philosophy, Charles Sturt University, Australia.

An investigation on the effect of maturity stage and variety on the quality of cereal forages. / Wang, Li.

Australia : Charles Sturt University, 2010. 143 p.

Research output: ThesisMasters Thesis

TY - THES

T1 - An investigation on the effect of maturity stage and variety on the quality of cereal forages

AU - Wang, Li.

PY - 2010

Y1 - 2010

N2 - Two groups of cereal forage crops, including various cultivars of barley, oats, triticale and wheat, were planted at different sites and harvested at boot, anthesis and milk stages respectively. The effects of maturity stage and variety on nutritive values and predicted digestibility were measured by near-infrared reflectance spectrophotometry (NIR). The effects of stage, variety and their interaction were significant (P<0.001) for samples collected at one site (78 samples), but only the effect of stage was significant (P<0.001) for samples from the other site (125 samples). For samples from the first site, the mean concentration of neutral detergent fibre (NDF) and acid detergent fibre (ADF) increased from boot to anthesis stage and then decreased from anthesis to milk stage; the crude protein (CP) content decreased significantly from boot to milk stage; and the mean predicted digestibilities declined significantly from boot to anthesis and then to milk. For samples from the second site, the mean concentration of NDF and ADF did not differ between boot and anthesis stage but increased significantly from anthesis to milk stage; the CP content decreased significantly from anthesis to milk stage; and the mean predicted digestibilities did not change from boot to anthesis and then decreased to milk. The predicted digestibilities in NIR were calibrated by R-P (Rumen fluid Pepsin method) and P-C (Pepsin Cellulase method) respectively, but differences were noticed between them. Therefore, the experiment was carried out to measure the effect of method on the predicted digestibility by R-P and P-C method for each group respectively.

AB - Two groups of cereal forage crops, including various cultivars of barley, oats, triticale and wheat, were planted at different sites and harvested at boot, anthesis and milk stages respectively. The effects of maturity stage and variety on nutritive values and predicted digestibility were measured by near-infrared reflectance spectrophotometry (NIR). The effects of stage, variety and their interaction were significant (P<0.001) for samples collected at one site (78 samples), but only the effect of stage was significant (P<0.001) for samples from the other site (125 samples). For samples from the first site, the mean concentration of neutral detergent fibre (NDF) and acid detergent fibre (ADF) increased from boot to anthesis stage and then decreased from anthesis to milk stage; the crude protein (CP) content decreased significantly from boot to milk stage; and the mean predicted digestibilities declined significantly from boot to anthesis and then to milk. For samples from the second site, the mean concentration of NDF and ADF did not differ between boot and anthesis stage but increased significantly from anthesis to milk stage; the CP content decreased significantly from anthesis to milk stage; and the mean predicted digestibilities did not change from boot to anthesis and then decreased to milk. The predicted digestibilities in NIR were calibrated by R-P (Rumen fluid Pepsin method) and P-C (Pepsin Cellulase method) respectively, but differences were noticed between them. Therefore, the experiment was carried out to measure the effect of method on the predicted digestibility by R-P and P-C method for each group respectively.

M3 - Masters Thesis

PB - Charles Sturt University

CY - Australia

ER -