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为探究生物糖氮肥和尿素2种类型氮肥对大豆根瘤的调控效应,以合丰55为试验材料,设置4个处理,即:生物糖氮肥150 kg·hm-2(N1)、生物糖氮肥225 kg·hm-2(N2)、尿素150 kg·hm-2(N3)、尿素75 kg·hm-2(N4),采用随机区组设计,研究不同类型氮肥对大豆根瘤数量、根瘤干重、根系干重、地上部干物重和有效根瘤的影响。结果表明,不同处理对大豆籽粒产量的影响依次为N1>N2>N4>N3,且各处理间差异达到极显著水平。N1的大豆籽粒产量比N2、N3、N4分别高6.24%、21.57%、9.39%。N1的根瘤数量、根瘤干重、根系干重、地上部干物重以及有效根瘤最高,最终籽粒产量最高。因此,生物糖氮肥对大豆根瘤生长发育起促进作用,进而提高大豆产量。本研究为大豆氮素营养调控和高产施肥提供了理论参考。
In order to explore the regulatory effect of two kinds of nitrogenous fertilizers, biosynthesis of sugar, nitrogen and urea on soybean nodule, four treatments were conducted with Hefeng 55 as test material, ie, 150 kg · hm-2 of biological sugar and nitrogen fertilizer, kg · hm-2 (N2), urea 150 kg · hm-2 (N3) and urea 75 kg · hm-2 (N4). The randomized block design was used to study the effects of different nitrogen fertilization on the number of nodules, Root dry weight, shoot dry weight and effective nodule. The results showed that the effects of different treatments on the grain yield of soybean were N1> N2> N4> N3, and the differences among the treatments reached extremely significant levels. The grain yield of N1 was 6.24%, 21.57% and 9.39% higher than that of N2, N3 and N4, respectively. Nodule number, root nodule dry weight, root dry weight, aboveground dry weight and effective nodule were the highest, and the final grain yield was the highest. Therefore, the biological sugar and nitrogen fertilizer on the growth and development of soybean nodules play a catalytic role, thereby increasing soybean yield. This study provides a theoretical reference for the regulation of nitrogen nutrition and high-yield fertilization in soybean.