Lecture 14 - 021711

Lecture 14 - 021711 - Plant Nutrition and Nutrient Uptake...

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1 Plant Nutrition and Nutrient Uptake Lecture #14 Professor Julian Schroeder •v id eo U.S. Oil Consumption 7.3 Billion Barrels/ year (= 20 . 10 6 Brls/ day).
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2 US Biomass inventory 1.3 billion dry tons of excess plant biomass per year = 100 billion gallons of ethanol at current efficiency Forest 12.8% Urban waste 2.9% Manure 4.1% Grains 5.2% Crop residues 7.6% Soy 6.2% Wheat straw 6.1% Corn stover 19.9% Perennial crops 35.2% From: Billion ton Vision, DOE & USDA 2005 U.S. Oil Consumption 7.3 Billion Barrels/ year (= 20 . 10 6 Brls/ day). Current efficiency: U.S. could produce 2.3 Billion Barrels/ year of Ethanol from excess plant biomass 31% of present oil use (from cellulose). 1950 1955 1960 1965 1970 1975 1980 1985 1990 1995 Year 0 500 1000 1500 2000 M Hectares Actual 1950 equivalent Data from Worldwatch database Hectares of Grain With and Without Yield Improvements
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3 1987 Acreage Acreage Needed at 1929 Production Levels Nutrient Transport at the cellular level Cell wall Cytosol Vacuole Plasmodesma Vacuolar membrane Plasma membrane (a) Cell compartments Key Transmembrane route Apoplast
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Lecture 14 - 021711 - Plant Nutrition and Nutrient Uptake...

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