Nitrogen fertilization and nutrient removal are some of the greatest challenges associated with the production of bioethanol from corn grain in the United States. The project was conducted in Missouri from 2008 to 2009 in a silt loam soil to determinethe effect of N fertilization on the nutrient removal by corn grain. Corn grain removed 31 to 201 kg N/ha, 10 to 102 kg K/ha, 3 to 20 kg P/ha, 0.6 to 11 kg Ca/ha, 0.7 to 2.7 kg Fe/ha, 0.045 kg Mn/ha, and 0.003 kg Cu/ha, depending on the N rate. Our results suggest that as farmers add N to their soil to improve the grain or starch yield, they will also be increasing the nutrient removal, therefore affecting the fertility of their fields if the nutrient removal is not offset.
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机译：在美国，氮肥和养分去除是与玉米粒生产生物乙醇相关的最大挑战。该项目于2008年至2009年在密苏里州的一种粉质壤土上进行，以确定氮肥对玉米籽粒去除营养物的影响。玉米籽粒去除31至201 kg N / ha，10至102 kg K / ha，3至20 kg P / ha，0.6至11 kg Ca / ha，0.7至2.7 kg Fe / ha，0.045 kg Mn / ha和0.003 kg Cu / ha，取决于氮比率。我们的结果表明，随着农民向土壤中添加氮以提高谷物或淀粉的产量，他们还将增加养分的去除，因此如果不消除养分的去除，则会影响其田地的肥力。
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