最新研究發現 有機農業可滿足全球糧食需求 | 環境資訊中心

最新研究發現 有機農業可滿足全球糧食需求

2007年07月19日
摘譯自2007年7月16日ENS美國,密西根州,安娜堡報導;謝芳怡編譯;蔡麗伶審校

Plant physiologist John Teasdale heads the Sustainable Agricultural Systems Lab at the USDA's Agricultural Research Center in Beltsville, Maryland. (Photo courtesy USDA) 一項最新研究結果指出,在開發中國家的單一農地上從事有機農業耕種,與在同樣一塊農地上進行低度集約農業相比,有機耕種所能產生的效益是後者的3倍,這項研究結果也反駁了長久以來認為有機耕種方式無法生產足夠作物來餵飽全球人口的說法。

美國密西根大學安娜堡分校自然資源與環境學院教授,同時也是該項研究主要調查人員之一的Ivette Perfecto教授就表示,在開發中國家,可以利用有機方式,將糧食產量增加2到3倍。

研究人員也發現,藉用使用現有的有機肥料數量,不增加耕種用地,將綠色肥料亦即覆蓋作物犁進土壤,自然改善土壤品質,就可能提高生產效益。

由美國農業研發服務部官派科學家所進行的另一項研究則發現,比起傳統不整地耕種方式,有機耕種促進土壤有機物質增生的成效更好。

但反對人士認為,有機食品比起其他食品較不安全,而且有可能增加人類接觸生物污染或食物中毒的風險,批評者更指出,用於有機作物的肥料可能含有人類病原體、黴菌毒素,以及飼養家畜時添加的抗生素。

New Research Finds Organic Farming Can Feed the World
ANN ARBOR, Michigan, July 16, 2007 (ENS)

University of Michigan Associate Professor of Natural Resources Ivette Perfecto (Photo courtesy U. Michigan)Organic farming can yield up to three times as much food on individual farms in developing countries as low-intensive methods on the same land, according to new research that refutes the long-standing claim that organic farming methods cannot produce enough food to feed the global population.

But in developing countries, food production could double or triple using organic methods, said Dr. Ivette Perfecto, professor at the university's School of Natural Resources and Environment, and one the study's principal investigators.

The authors found that the higher yields could be accomplished using existing quantities of organic fertilizers, without putting more farmland into production, by using green manures - cover crops plowed into the soil to provide natural soil amendments.

In a separate study government scientists with the U.S. Department of Agriculture's Agricultural Research Service, ARS, found that organic farming can build up soil organic matter better than conventional no-till farming.

Critics argue that organic food could be less safe than other foods, because it might increase the risk of exposure to biological contaminants and food-borne diseases. Critics point out that manure used to fertilize organic crops might contain human pathogens, mycotoxins from molds, and antibiotics fed to livestock.

全文及圖片詳見 ENS