Dissertation > Excellent graduate degree dissertation topics show

Research on the Variation Law of Corn Silage Nutritional Composition and Fungal under Different Storage Periods

Author: ZuoJun
Tutor: GaoYuPeng
School: Northwest University of Science and Technology
Course: Animal Nutrition and Feed Science
Keywords: whole-plant corn silage corn straw silage storage period nutritional component mould toxin law of wariation
CLC: S816
Type: Master's thesis
Year: 2009
Downloads: 142
Quote: 0
Read: Download Dissertation

Abstract


Experimental material was corn stalks of the breed Nongda108. Whole-plant corn silage was made with 89 days growth whole-plane corn and corn straw silage with 125 days growth corn straw. Both silos were opened in 50 days. Sensory evaluation, proximate nutrients analysis, fermentation quality analysis, fungal count and preliminary identification were conducted for the two silages of seven different periods of storage(storing time from 50 to 290-day), for studying the variation law of corn silage nutritional quality and activity of mould, so as to provide scientific basis for the better utilization of silage and the control of mould. The results were as follows:1. Sensory evaluation for corn silage under different storage periods in opened siloResults of sensory evaluation of corn silage were: whole-plant corn silage prior to 180 days in storage and the corn straw silage prior to 95 days in storage, sensory identification results were excellent; whole-plant corn silage in the 185 ~ 290-day storage period, the corn straw silage in the 140 ~ 260 days of storage period for good-quality change; corn stalk silage in the 260 ~ 290-day storage period for the general quality of the change.2. Change of main nutrients of corn silage under different storage periods in opened siloDuring in the 50~290 days storage after opened, there was an upward trend of the contents of DM, NDF, ADF,ADL in both two silage, while the downward trend of the contents of CP, starch, Ca and P.3. Change of fermentation quality of corn silage under different storage periods in opened siloDuring in the storage after opened, there was an downward trend of the fermentation quality. pH value and the value of NH3-N of both two silage turned up, the total organic acids turned downward. Lactic acid are relatively low, to the storage of 290 days, lactic acid in both two kinds of silage were lower than the acetic acid content, the two are not always detected in butyric acid.4. Change of the total number of mould in corn silage and and the identification of toxin-producing mouldDuring in the 50~290 days storage after opened, corn silage mould attached to the number of the extension of storage time with the rapid increase in the degree of increased non-performing fermentation. After separation, purification and morphological identification, five toxin-producing fungi were found, they were as follows: Fusarium species of F.moniliforme; Penicillium genus P. viridicatum; Aspergillus of A. flavus, A. ochraceus and A. nidulans. F.moniliforme which is predominant mould, followed by A. flavus, P. viridicatum, A. ochraceus and A. nidulans distributed less.5. Change of toxin of corn silage under different storage periods in opened siloDuring in the 50~290 days storage after opened, the content of AFB1 and ZEN in corn silage turned up. AFB1 content is proposed to feed into the quality of the evaluation criteria for silage: the highest AFB1 limit of the silage dry matter is 50μg / kg.

Related Dissertations

  1. Research on BT Toxin Oligomer Formation Induced by Lipid Raft and the Immunodetection Explore of Cadherin,S476.1
  2. Screen Regulators of Virulence Gene TcpP and Functional Analysis of LysR Proteins in Vibrio Cholerae,R378
  3. The Clinical Analysis between the TCM Syndromes of Subacute Thyroiditis (Hyperthyroidism Stage),R259
  4. Effect of Botulinum Toxin Injection Guided by Different Strategies on Spasticity in Patients after Brain Injury,R743
  5. Flower two -spotted spider mite pests of large fungal toxicity,S476
  6. Optimization Design of the Mould of Water Lubricated Rubber-alloy Bearings,TH133.3
  7. Parameterized Mould-making of Face Gear with Helical Involute Pinion Used on Fishing Tackle Industry,S972
  8. Studies on the Pathogenic Mechanism of Botrytis Cinerea Toxin and Its Inactivation,S436.412
  9. Botulinum Toxin A for Treatment of Masseteric Muscle Hypertrophy: Long-term Follow-up,R622
  10. CTB-HRP to examine internal organs associated with acupuncture and acupressure application of neural properties,R224
  11. Analysis of a Plant-herbivore Model with Time-Delay and Toxin-Determined Functional Response,O242.1
  12. Hippocampal cell membrane proteomics and genomics dimensional chromatography on toxin research applications,Q51
  13. The Research on Bamboo’s Fiber/Polypropylene Composit,TQ320.7
  14. Physiological and Biochemical Response to Poplar Canker Toxin in Callus Tissue of Poplar,S763.7
  15. The Cultural Characteristics and Pathogenic Differentiation of Verticillium Dahliae from Cotton in Shandong Province,S435.62
  16. Determination of Fusarium Mycotoxins and Its Contamination Analysis in Wheat,S435.121
  17. Effects of Qi-Boosting Toxin-Resolving Formula on the Structure of Cellular Adhesion System in the Implanted Tumors with Human NPC Cells Among Nude Mice,R739.63
  18. Square foot and mouth disease on the 2nd heat treatment of children with HFMD poison Sheng Syndrome of,R272
  19. Clinical Study of Invigorating Qi and Nourishing Yin for Functional Constipation (Syndrome of Qi and Yin Deficiency and Interior Accumulated by Toxin),R256.35
  20. On the Enlightenment of Chinese Folk Arts Elements in Modein Graphic Design,J524
  21. Research on the Automobile Panel Mold Quotation System,TP311.52

CLC: > Agricultural Sciences > Livestock, animal medicine,hunting,silkworm,bee > General Animal Science > Feed
© 2012 www.DissertationTopic.Net  Mobile