Environmental Plant Physiology Introduction. K. Raja Reddy
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1 Environmental Plant Physiology Introduction K. Raja Reddy
2 Personal - Family
3 Personal - Education Education: Ph.D. in Botany with Applied Plant Physiology as a major Research areas: Environmental plant physiology including global change, crop modeling, remote sensing. Years at MSU: 21 Taught the course since: 2
4 Trends That Shape Our Future
5 Trends, Signs and Signatures from the Earth Past, Present and Future World Population World Population Population in Billions Year
6 Trends, Signs and Signatures from the Earth Present and Future World Population Trends % 1% 5% 12% 2, Population, millions ,52 1,437 1,31 1,87 1, ,941-5% 42% 39% Asia China India Africa Europe Latin Oceania America (less China and India) North America
7 Trends, Signs and Signatures from the Earth Maize - Production and Yield Selected Countries 5 45 Year 24, Area = Mha, Production = MMt USA China Brazil Mexico France India Romania Argentina Indonesia Nigeria South Africa Maize production area, % Maize production, % 1 Area Production
8 Trends, Signs and Signatures from the Earth Maize - Production and Yield Selected Countries 12 1 Yield USA: 114 kg yr -1 China: 1 kg yr -1 Brazil: 47 kg yr -1 Production USA: 3.9 MMt yr -1 China: 2.77 MMt yr -1 Brazil: MMt yr -1 P= 67%, and A= 46% 35 3 Maize yield, kg ha USA China USA China Maize production, MMt 2 Brazil Brazil Year Year
9 Trends, Signs and Signatures from the Earth Wheat - Production and Yield Selected Countries Area Production Year 24 Year 24, Area = Mha, Production = MMt 2 15 China India USA Russian Fed. France Germany Canada Australia Turkey Ukraine Pakistan Argentina Kazakhstan Wheat production area, % Wheat production, % 1 5
10 Trends, Signs and Signatures from the Earth Wheat - Production and Yield Selected Countries Yield China: 88kg yr -1 India: 5 kg yr -1 China Production USA: 26 kg yr -1 China: 2.42 MMt yr -1 USA: 1.62 MMt yr -1 India: MMt yr Wheat yield, kg ha USA India China USA Wheat production, MMt 1 5 India Year Year
11 Trends, Signs and Signatures from the Earth Rice - Production and Yield Selected Countries 35 Year 24, Area = Mha, Production = 65.8 MMt Area Production 3 25 USA Japan Brazil Philippines Myanmar Thailand Vietnam Bangladesh Indonesia India China Rice production area, % Rice production, %
12 Trends, Signs and Signatures from the Earth Rice - Production and Yield Selected Countries Rice yield, kg ha Yield China: 12 kg yr -1 Indonesia: 77 kg yr -1 India: 42 kg yr -1 China Indonesia India Production China: 2.98 MMt yr -1 India: 2.15 MMt yr -1 Indonesia: 1.12 MMt yr -1 China India Indonesia Rice production, MMt Year P= 6%, and A= 55% Year
13 Trends, Signs and Signatures from the Earth Soybean - Production and Yield Selected Countries Year 24, Area = Mha, Production = 24.3 MMt Area Production 1 8 USA Brazil Argentina China India Paraguay Canada Bolivia Indonesia Italy Soybean production area, Mha Soybean production, MMt 6 4 2
14 Trends, Signs and Signatures from the Earth Soybean - Production and Yield Selected Countries Soybean yield, kg ha Yield USA: 26kg yr -1 Brazil: 37 kg yr -1 China: 26 kg yr -1 USA Brazil China Production USA: 1.35 MMt yr -1 MMt yr -1 China: MMt yr -1 USA Brazil Soybean production, MMt 1 China Year Year
15 Trends, Signs and Signatures from the Earth Cotton - Production and Yield Selected Countries Seed cotton yield, kg ha Yield China: 58 kg yr -1 USA: 16 kg yr -1 India: kg yr -1 China USA Production China: MMt yr -1 USA: MMt yr -1 India: MMt yr -1 China USA Cotton production, MMt 1 5 India India Year Year
16 Trends, Signs and Signatures from the Earth Global Major Foods Meat and Poultry Production Meat and Poultry Production Meat and Poultry Production Relative Trends Meat and Poultry production, million t Poultry Meat Year Meat and Poultry production trends,1961 = to 27: Million t Poultry = 9 and 87 Meat = 71 and 286 Poultry Meat Year
17 Trends, Signs and Signatures from the Earth Global Major Foods Per Capita Consumption 45 4 Vegetables = 3.21 lb/year Consumtion, lb/person Selected fruits = 1.95 lb/year Meat and Poultry =.65 lb/year 15 Flour and Cereals = 2.7 lb/year Year
18 Trends, Signs and Signatures from the Earth Cropland area, Irrigation and Salinization Percentage change from Year 1985 to 2 Cropland area Irrigated area Salinized area Mha China (22%) 7-8 (14%) India (31%) 1-3 (5%) USA (13%) (15%) USSR (2%) (21%) World (21%) (37%) S.G. Pritchard and J. S. Amthor, 25
19 Trends, Signs and Signatures from the Earth Management Practices 4. Crop rotations Morrow plots: East-central Illinois 4 Fertility management Sanborn Field: Central Missouri Soil organic carbon (%) Soil organic carbon (%) Estimated to 4% in 1888 Wagner, (1989) Corn-oats-hay rotation Corn-oats ( ), Corn-soybeans ( ) Continuous corn Year Reicosky et al. 2 Wheat, 6 Tons Manure/year Corn, 6 Tons Manure/year Continuous Wheat Continuous Corn Year
20 Trends, Signs and Signatures from the Earth Population, cereal yield, arable and irrigated area, N use 5 5 Relative valuses (1961=1) Cereal yield Arable land area Irrigated land area Population Fertilizer use 2 values are: Cereal yield = 2.25 Arable area = 1.9 Irrigated area = 1.98 Population = 1.97 Fertilizer use = Year
21 Feeding 1 Billion Mouths We must develop the capacity to feed 1 billion people within in the next 4 to 5 years. The average world current cereal yield is about 3 tons per ha for about 6.4 billion people. We need about 4 tons per ha for 8 billion (33 % more than the current), and 5 tons per ha for 1 billion (67 % more than the current).
22 Routes to Greater Food Production Increase in the area of land under cultivation. Increase in the number of crops per hectare per year (mostly practiced in tropics, requires access to irrigation, high input use, short season cultivars, and others such as labor, pest and disease control may be a problem). Displacement of lower yielding crops by higher yielding ones (done since the dawn of domestication). Efficiency of crop production in terms of: Per unit of land area (yield per ha) Per unit of time Per unit of inputs such as fertilizers, water and labor etc.
23 Here comes the greatest challenge of our time, The Global Climate Change
24 Trends, Signs and Signatures from the Earth Greenhouse gases (CO2, CH4, N2O etc.) Temperatures Glaciers, oceans and sea-levels Precipitation patterns and drought intensities Extreme events Higher ozone and UV-B radiations
25 Global Warming and the Ozone Story Global Warming Process Ozone Depleting Process CFCs are commonly used as refrigerants, solvents, and foam blowing agents. The most common CFCs are CFC-11, CFC- 12, CFC-113, CFC-114, and CFC-115.
26 Trends, Signs and Signatures from the Earth Past and Current Levels in GHG Concentrations, Rates of Change and Atmospheric Lifetime Period Pre-industrial concentration (185) Global warming gases Ozone depleting chemicals CO 2 about 28 ppm Methane about 7 ppb Nitrous oxide about 27 ppb CFC-11 HFC-23 Perfluromethane 4 ppt Current Concentration in ppm 1857 ppb 321 ppb 244 ppt 18 ppt 74 ppt Rate of change 1.43 ppm/yr 7. ppb/yr.8 ppb/yr -1.4 ppt/yr.55 ppt/yr 1 ppt/yr Atmospheric lifetime 5 to 2 years 12 years 114 years 45 years 26 Years >5, years
27 Trends, Signs and Signatures from the Earth Future trends in global carbon dioxide concentration and associated climate change, if no interventions are made Climate variable Carbon dioxide concentration ppm ppm ppm Global mean temperature change from the year o C o C o C Global mean sealevel rise from the year cm 5-32 cm cm
28 4 Trends, Signs and Signatures from the Earth Spatial and temporal trends in climate Temperature, C Hyderabad, India Phoenix, AZ, USA Maros Indonesia 5 Stoneville, MS, USA Day of the Year
29 Trends, Signs and Signatures from the Earth Present and Projected Temperature Changes 5 4 Temperature, o C Hyderabad Stoneville, MS Stoneville, MS + Projected climate Hyderabad + Projected climate Optimum temperature for Rice Day of the year
30 Climate Change and Crop Productivity Some Considerations As human population expands and demand upon natural resources increases, the need to manage the environments in which people live becomes more important, but also more difficult. Climate change has no boundaries, and can t be viewed in isolation. We should consider other stresses on food production systems such as population dynamics, habitat destruction and fragmentation, land-use changes, biodiversity, land and water management and invasive species dominance.
31 Climate Change and Crop Productivity Some Considerations Land and water management is especially critical as the use of upstream watersheds can drastically affect large numbers of people living in downstream watersheds. The current and projected changes in climate are unprecedented, and the ecosystems including managed ecosystems such as agriculture may not cope with the changes projected in climate. An integrated approach that stresses both the importance of participatory planning and the institutional and technical constraints and opportunities is therefore necessary.
32 Environmental Stresses and Plant Growing Conditions
33 Environmental and Cultural Factors Limiting Potential Yields Atmospheric carbon dioxide Solar radiation Temperature (including extremes) Water (irrigation and rainfall) Wind Nutrients (N, P, K, and other nutrients) Others, Ultra-violet radiation, ozone etc., Growth regulators (such as PIX)
34 Area of Total World Land Surface Subject to Environmental Limitations of Various Types Limitation Area of world soil subject to limitation (%) Drought 27.9 Shallow soil 24.2 Mineral excess or deficiency 22.5 Flooding 12.2 Miscellaneous 3.1 None 1.1 Total 1 Temperature 14.8 (over laps with other stresses)
35 Environmental Plant Physiology Objectives The objectives of this course are to learn plant responses to abiotic stresses, particularly plant growth and development, and to learn modeling methodologies on how to integrate those plant processes under multiple stress conditions. At the end, the students are expected to: understand individual as well as interactive abiotic stress effects on photosynthesis, respiration, growth, development and finally yield. understand on how to develop methodologies to integrate multiple stress factor effects on various plant/canopy processes.
36 Environmental Plant Physiology Chapter 1 Atmospheric carbon dioxide Solar radiation Temperature (Including extremes) Water Wind Nutrients Other factors such as ozone Plant growth regulators The facilities and tools
37 Environmental Plant Physiology Chapter 2 Photosynthesis and the environment The Environmental productivity Index (EPI) concept. The photosynthesis - Species variability. Photosynthesis and aging process. Respiration.
38 Environmental Plant Physiology Chapter 3 Crop growth and development Phenology Growth of various organs and whole plants. The concept of environmental productivity index in quantifying crop growth and development in response to the environment.
39 Environmental Plant Physiology Chapter 4 Scaling of processes from leaves to whole plant, canopies or ecosystems. Chapter 5 Special topics include: Plant growth regulators PIX. Remote sensing and environmental plant physiology.
40 Environmental Plant Physiology Suggested reading: Introduction Feeding the Ten Billion-Plants and Population Growth- 1998, L. T. Evans, Chapter 12, pages Crop Science Progress and Prospects- 2, edited by J. Nosberger, H. H. Geiger and P. C. Struik, Chapter 3, Crop Science research to assure food security by K.G. Cassman, pages, Crop Responses to Environment 21, A. E. Hall. Chapter 1, Introduction, pages 1-7. Meeting cereal demand while protecting natural resources and improving environmental quality, KG Cassman, A. Dobermann, DT Walters and H. Yang, Annual Review of Environmental Resources, 23, 28:
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