carbon_substrates

Table of Contents

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• XI. CARBON CYCLE
  
• (Untitled)
  
• Cellulose content varies with type of plant material
  
• Several enzymes breaks cellulose into mono- or disaccarides
  
• Cellulose decomposition depends on:
  
• Cellulose decomposition depends on plant material
  
• 1. Organisms
  
• 2. Soil pH
  
• 3. Soil Aeration
  
• 4. Soil texture
  
• 5. Mixed cultures
  
• B. Hemicellulose
  
• C. Lignin
  
• Lignin is most resistant to microbial decomposition
  
• Lignin % increases as decomposition progresses
  
• 1) Types of lignin
  
• 2) Microorganisms
  
• (Untitled)
  
• D. Wood Decay Types
  
• 1. White-rot decay
  
• Both cellulose and lignin removed by white-rot fungi
  
• 2. Brown-rot fungi
  
• This type of decayed wood can be an important site for root activity
  
• (Untitled)
  
• What decay type is active in this residue?
  
• Patterns of Wood Decomposition
  
• Biological Pulping
  
• Other Polysaccharides
  
• E. Hydrocarbons
  
• Only a few bacteria can produce CH4
  
• (Untitled)