Field experiments were conducted to study the influence of different forms of urea added nano-carbon on dry matter accumulation and yield of soybean in 2013 and 2014. The results indicated dry matter accumulation of soybean was significantly increased in different growth period in CU+CRU+C (common urea+control ed release urea+nano-carbon) treatment. Pods, grains, and 100-grain weight under the treatment performed at their best. Furthermore, the relative growth rate was distinctly enhanced of emergence for soybean. In addition, compared with CU (common urea) treatment, the yield of soybean increased 24.5%, 16.7% in 2013 and 2014, respectively. Different urea added nano-carbon, therefore, increased dry matter accumulation of soybean, enhanced the relative growth rate in seedling stage and significantly increased soybean yield in black soil.%为进一步探究纳米碳在作物生产中的肥效效果，通过2013年和2014年田间试验系统研究不同尿素添加纳米碳对大豆干物质积累量和产量的影响。结果表明，普通尿素+控释尿素＋纳米碳（CU+CRU+C）处理可显著增加大豆不同生育期干物质积累量，该处理大豆单株荚数、单株粒数、百粒重均最高，提高大豆苗期相对生长速率。试验结果还表明，2013年和2014年普通尿素+控释尿素＋纳米碳处理的大豆产量比普通尿素（CU）处理分别增加24.5%和16.7%。在黑土生态条件下，不同尿素添加纳米碳后可增加大豆干物质积累量，提高苗期相对生长速率，使大豆产量显著增加。
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