今后,，持續(xù)增長的人口,、不斷增長的收入,、肉類和乳制品消費的增加,、以及生物燃料使用的不斷擴大,，都將對世界農業(yè)和自然資源產生前所未有的需求。在這種背景下,，我們能否滿足不斷增長的食品需求同時減少農業(yè)生產對環(huán)境的破壞,？在本期的一篇“分析”文章中，一個由環(huán)境和農業(yè)科學家組成的國際小組對這一問題做出了肯定回答,，但要做到這一點將是不容易的,。利用新的地理空間數據和模型，他們評估了新的農業(yè)生產方式何以能夠對糧食生產和環(huán)境可持續(xù)發(fā)展都有利,。 他們識別出能夠使糧食產量加倍同時減少環(huán)境影響的四個策略：第一,，停止農業(yè)生產的擴張；第二,，縮小低產農田的“產量差距”,；第三，提高收成,；第四,，我們需要改變自己的飲食習慣，使糧食生產能夠減少浪費,，即減少用作牲畜飼料、用來生產生物能源和用于其他非食物應用的糧食用量,。(生物谷 Bioon.com)
doi:10.1038/nature10452
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Solutions for a cultivated planet
Jonathan A. Foley,1 Navin Ramankutty,2 Kate A. Brauman,1 Emily S. Cassidy,1 James S. Gerber,1 Matt Johnston,1 Nathaniel D. Mueller,1 Christine O’Connell,1 Deepak K. Ray,1 Paul C. West,1 Christian Balzer,3 Elena M. Bennett,4 Stephen R. Carpenter,5 Jason Hill,1, 6 Chad Monfreda,7 Stephen Polasky,1, 8 Johan Rockstr?m,9 John Sheehan,1 Stefan Siebert,10 David Tilman1, 11 & David P. M. Zaks12
Increasing population and consumption are placing unprecedented demands on agriculture and natural resources. Today, approximately a billion people are chronically malnourished while our agricultural systems are concurrently degrading land, water, biodiversity and climate on a global scale. To meet the world’s future food security and sustainability needs, food production must grow substantially while, at the same time, agriculture’s environmental footprint must shrink dramatically. Here we analyse solutions to this dilemma, showing that tremendous progress could be made by halting agricultural expansion, closing ‘yield gaps’ on underperforming lands, increasing cropping efficiency, shifting diets and reducing waste. Together, these strategies could double food production while greatly reducing the environmental impacts of agriculture.
