Mäder Paul, Fliessbach Andreas, Dubois David, Gunst Lucie, Fried Padruot, Niggli Urs
Research Institute of Organic Agriculture, Ackerstrasse, CH-5070 Frick, Switzerland.
Science. 2002 May 31;296(5573):1694-7. doi: 10.1126/science.1071148.
An understanding of agroecosystems is key to determining effective farming systems. Here we report results from a 21-year study of agronomic and ecological performance of biodynamic, bioorganic, and conventional farming systems in Central Europe. We found crop yields to be 20% lower in the organic systems, although input of fertilizer and energy was reduced by 34 to 53% and pesticide input by 97%. Enhanced soil fertility and higher biodiversity found in organic plots may render these systems less dependent on external inputs.
了解农业生态系统是确定有效耕作制度的关键。在此，我们报告了一项针对中欧生物动力、生物有机和传统耕作制度的农艺和生态性能进行的为期21年研究的结果。我们发现，有机耕作制度下的作物产量低20%，尽管肥料和能源投入减少了34%至53%，农药投入减少了97%。在有机地块中发现的土壤肥力增强和生物多样性增加，可能使这些制度减少对外界投入的依赖。
