International trade of animal feed

its relationships with livestock density and N and P balances at country level

Jingmeng Wang, Qian Liu, Yong Hou, Wei Qin, Jan Peter Lesschen, Fusuo Zhang*, Oene Oenema

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

6 Citations (Scopus)

Abstract

International trade of food and feed has facilitated the specialization and agglomeration of agricultural production systems in many countries. Confined animals in specialized production systems are increasingly supplied with soybean and maize, imported from other countries. This has increased animal productivity but has also contributed to spatially decoupled crop and animal production systems. We analyzed the changes in the trade of soybean and maize at the global level in the period 1961–2011, and related these to the changes in livestock density and nutrient balances in the whole food system for 11 selected countries. Export of soybean and maize remained dominated by few countries (mainly USA, Argentina and Brazil) during the period 1961–2011, while the number of importing countries increased. Increases in the import of maize and soybean are positively related with changes in livestock density and N and P balances of national food systems. Imported soybean accounted for 12–36% of the calculated N balance at country level, and imported maize for 0–26%. There were large differences between importing countries; increases in the N surplus ranged from 75 to 306 kg N/ha and in the P surplus from 2 to 49 kg P/ha when the mean livestock density increased 1 LU/ha. This variation is related to differences in nutrient management regulations and to spatial variations in livestock density within countries. Our study contributes to the understanding of the complex relationships between the international trade of animal feed, livestock density and environmental impacts associated with N and P balances.

Original languageEnglish
Pages (from-to)197-211
JournalNutrient Cycling in Agroecosystems
Volume110
Issue number1
Early online date4 Nov 2017
DOIs
Publication statusPublished - Jan 2018

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international trade
soybean
livestock
maize
soybeans
corn
animal
production system
production technology
animal production
surpluses
food
nutrient balance
nutrient management
agglomeration
crop production
agricultural production
imports
import
spatial variation

Keywords

  • Decoupled crop–animal system
  • Food system
  • Maize
  • Nutrient balances
  • Soybean
  • Specialization

Cite this

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title = "International trade of animal feed: its relationships with livestock density and N and P balances at country level",
abstract = "International trade of food and feed has facilitated the specialization and agglomeration of agricultural production systems in many countries. Confined animals in specialized production systems are increasingly supplied with soybean and maize, imported from other countries. This has increased animal productivity but has also contributed to spatially decoupled crop and animal production systems. We analyzed the changes in the trade of soybean and maize at the global level in the period 1961–2011, and related these to the changes in livestock density and nutrient balances in the whole food system for 11 selected countries. Export of soybean and maize remained dominated by few countries (mainly USA, Argentina and Brazil) during the period 1961–2011, while the number of importing countries increased. Increases in the import of maize and soybean are positively related with changes in livestock density and N and P balances of national food systems. Imported soybean accounted for 12–36{\%} of the calculated N balance at country level, and imported maize for 0–26{\%}. There were large differences between importing countries; increases in the N surplus ranged from 75 to 306 kg N/ha and in the P surplus from 2 to 49 kg P/ha when the mean livestock density increased 1 LU/ha. This variation is related to differences in nutrient management regulations and to spatial variations in livestock density within countries. Our study contributes to the understanding of the complex relationships between the international trade of animal feed, livestock density and environmental impacts associated with N and P balances.",
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International trade of animal feed : its relationships with livestock density and N and P balances at country level. / Wang, Jingmeng; Liu, Qian; Hou, Yong; Qin, Wei; Lesschen, Jan Peter; Zhang, Fusuo; Oenema, Oene.

In: Nutrient Cycling in Agroecosystems, Vol. 110, No. 1, 01.2018, p. 197-211.

Research output: Contribution to journalArticleAcademicpeer-review

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T2 - its relationships with livestock density and N and P balances at country level

AU - Wang, Jingmeng

AU - Liu, Qian

AU - Hou, Yong

AU - Qin, Wei

AU - Lesschen, Jan Peter

AU - Zhang, Fusuo

AU - Oenema, Oene

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