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Food and feed trade has greatly impacted global land and nitrogen use efficiencies over 1961–2017
Nature Food ( IF 23.2 ) Pub Date : 2021-10-14 , DOI: 10.1038/s43016-021-00351-4
Zhaohai Bai 1, 2 , Wenqi Ma 3 , Hao Zhao 1 , Mengchu Guo 4 , Oene Oenema 2, 5 , Pete Smith 6 , Gerard Velthof 5 , Xia Liu 7 , Chunsheng Hu 1 , Peiguang Wang 8 , Nannan Zhang 1 , Ling Liu 1 , Sujuan Guo 1 , Xiangwen Fan 1 , Wilfried Winiwarter 9, 10 , Lin Ma 1
Affiliation  

International trade of agricultural products has complicated and far-reaching impacts on land and nitrogen use efficiencies. We analysed the productivity of cropland and livestock and associated use of feed and fertilizer efficiency for over 240 countries, and estimated these countries’ cumulative contributions to imports and exports of 190 agricultural products for the period 1961–2017. Crop trade has increased global land and partial fertilizer nitrogen productivities in terms of protein production, which equalled savings of 2,270 Mha cropland and 480 Tg synthetic fertilizer nitrogen over the analysed period. However, crop trade decreased global cropland productivity when productivity is expressed on an energy (per calorie) basis. Agricultural trade has generally moved towards optimality, that is, has increased global land and nitrogen use efficiencies during 1961–2017, but remains at a relatively low level. Overall, mixed impacts of trade on resource use indicate the need to rethink trade patterns and improve their optimality.



中文翻译:

1961 年至 2017 年,食品和饲料贸易极大地影响了全球土地和氮肥利用效率

农产品国际贸易对土地和氮肥利用效率有着复杂而深远的影响。我们分析了 240 多个国家的农田和牲畜生产力以及相关的饲料和化肥使用效率,并估计了这些国家在 1961 年至 2017 年期间对 190 种农产品进出口的累计贡献。农作物贸易提高了全球土地和部分化肥氮在蛋白质生产方面的生产率,相当于在分析期间节省了 2,270 Mha 农田和 480 Tg 合成化肥氮。然而,当生产力以能量(每卡路里)为基础表示时,农作物贸易降低了全球农田生产力。农产品贸易总体上走向最优,即 1961年至2017年间,全球土地和氮肥利用效率有所提高,但仍处于相对较低水平。总体而言,贸易对资源利用的影响参差不齐,表明需要重新思考贸易模式并提高其最优性。

更新日期:2021-10-14
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