施氮水平对大豆吸收利用氮素及产量的影响  

Effect of nitrogen levels on absorption and utilization of nitrogen and yield of soybean

作　　者：姚玉波[1] 马春梅[1] 张磊[1] 龚振平[1] 

机构地区：[1]东北农业大学农学院,哈尔滨150030

出　　处：《东北农业大学学报》2009年第4期6-10,共5页Journal of Northeast Agricultural University

基　　金：国家科技支撑计划(2006BAD21B01);黑龙江省科技攻关课题(GA06B101-3);黑龙江省教育厅骨干教师项目

摘　　要：本试验采用框栽方法,利用15N示踪,以(15NH4)2SO4作为标记氮肥,研究了施氮水平对大豆吸收利用氮素及产量的影响。结果表明,不同施氮水平对大豆的氮素积累和来源有明显影响,不同生育时期不同施氮水平的氮素积累量不同。高氮促进肥料氮的吸收,抑制根瘤固氮,肥料氮积累大小顺序为高氮>中氮>低氮(P<0.01),根瘤固氮大小顺序为低氮>中氮>高氮(P<0.01)。不同施氮水平对大豆产量有明显影响。低氮和中氮处理的产量明显高于高氮处理(P<0.01),而低氮和中氮处理无显著差异。Frame experiment （pot without bottom） was conducted to investigate the influence of nitrogen levels on absorption and utilization of nitrogen and yield of soybean. Nitrogen fertilizer was （15NH4）2SO4, which was labeled with ^15N. The results showed that the effect of N levels on N-accumulation and N-source of soybean was significant, and N-accumulation was various on different development stages. High N level facilitated the absorption of fertilizer-N, inhibited nitrogen fixation by nodules, fertilizer-N accumulation followed the order： high N level〉mid N level〉low N level and reached the significant level（P〈0.01）, nodulation-N accumulation followed the order： low N level〉mid N level〉high N level（P〈0.01）. Yield of soybean was affected by N levels, yields of low-N level and mid-N level treatments did not reach the significantly different levels, but they were obviously higher than that of high-N treatment.

关 键 词：大豆 施氮水平 氮吸收 

分 类 号：S565.1[农业科学—作物学]