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Davis: Conceptualization of N use efficiency and recovery in an integrated crop-livestock system

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Tangriani Simioni Assmann

on 30 September 2016

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Transcript of Davis: Conceptualization of N use efficiency and recovery in an integrated crop-livestock system

Conceptualization of N use efficiency and recovery in an integrated crop-livestock system
Tangriani Simioni Assmann
Alan Franzluebbers
Alceu Luiz Assmann

Workshop on integrated social and ecological modeling of crop and livestock systems
University of California, Davis
9-10, April
Nitrogen in the global food and feed harvest of the mid-1990s
All values are in Tg N yr by year
1 Tg is equal to 1000000000 kilogram
Food Proteins
directly in plants foods and indirectly in animal foods produced by feeding
Pasture Shoot Dry Matter
Corn Shoot N Concentration
Pasture Shoot N Concentration
Corn Shoot Dry Matter
Corn Shoot Dry Matter Accumulation and Pasture Dry Matter Accumulation in function of Days Accumulated after seedling and in function of time N-fertilization (N-pasture or N-Grains). Data not published: Maccari, M. (2014) and Bernardon, A. (2015)
Corn Shoot N Concentration and Pasture Shoot N Concentration in function of Days Accumulated after seedling and in function of time N-fertilization (N-pasture or N-Grains). Data not published: Maccari, M. (2014) and Bernardon, A. (2015)
Corn N Extraction and Pasture N Extraction in function of Days Accumulated after seedling and in function of time N-fertilization (N-pasture or N-Grains). Data not published: Maccari, M. (2014) and Bernardon, A. (2015)
Accumulated Dry Matter 103 and 186 accumulated days after seedling for Corn and Pasture respectively, and in function of time N-fertilization (N-pasture or N-Grains). Data not published: Maccari, M. (2014) and Bernardon, A. (2015)
Shoot N concentration 103 and 186 accumulated days after seedling for Corn and Pasture respectively, and in function of time N-fertilization (N-pasture or N-Grains). Data not published: Maccari, M. (2014) and Bernardon, A. (2015)
N extracted after 103 and 186 accumulated days after seedling for Corn and Pasture respectively, and in function of time N-fertilization (N-pasture or N-Grains). Data not published: Maccari, M. (2014) and Bernardon, A. (2015)
N Use Efficiency after 103 and 186 accumulated days after seedling for Corn and Pasture respectively, and in function of time N-fertilization (N-pasture or N-Grains). Data not published: Maccari, M. (2014) and Bernardon, A. (2015)
N Recovery after 103 and 186 accumulated days after seedling for Corn and Pasture respectively, and in function of time N-fertilization (N-pasture or N-Grains). Data not published: Maccari, M. (2014) and Bernardon, A. (2015)
Nitrogen
Phosphorus
Potassium
Body
Body
Body
Manure
Manure
Manure
Milk
Milk
Milk
Live Weight Gain = 310 kg / ha
N-Extracted = 8.6 kg of N in Live Weight / ha
N-recovery (%) in Live Weight (200 kg N / ha ) = 4.3 %
N-recovery (%)
Grazing Oat + Ryegrass = 150 grazing days
Rizzi, B. (2014): Data not published
N, P and K in fertilizers imported by Brazil in 2014
N, P and K exported in soybean from Brazil to China 2014/2015
Balance N, P and K imported and exported by Brazil (2014/2015)
Abelardo Luz Experiment: Corn harvest (2014) - Phase Grains
Abelardo Luz Experiment: Pasture Phase (2013)
Abelardo Luz Experiment: Corn seedling (2013) Transition between Phase Pasture to Phase Grain
Smil, V.: Ambio (2012)
Smil, V.: Ambio (2012)
Smil, V.: Ambio (2012)
Haynes, R. & Williams, P:
Advances in Agronomy (1993)
Corn N Extraction
Pasture N Extraction
Full transcript