大豆根瘤及产量对生物糖氮肥和尿素的响应

Response of Soybean Root Nodule and Yield to Biological-sugar Nitrogen Fertilizer and Urea

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。

To discuss and study the regulation effect of biological-sugar fertilizer and urea on soybean nodule,Hefeng55 was used as the test material to research the effect of different types of nitrogen on soybean nodule number,nodule dry weight,root dry weight,aboveground dry weight and effective nodule.Four treatments were applied at random block design,marked with N1（ 150 kg·hm^-2biological-sugar fertilizer）,N2（ 225 kg·hm^-2biological-sugar fertilizer）,N3（ 150 kg·hm^-2urea）,and N4（ 75 kg·hm^-2urea）.The results showed that the effect of different treatments on soybean seed yield followed the order of N1 N2 N4 N3 and yield difference among four treatments was significant.Seed yield under N1 treatment was 6.24%,21.57%,9.39% higher than that under N2,N3 and N4,respectively.Nodule number,dry weight of root nodule,root dry weight,aboveground dry weight and effective nodule under N1 treatment were highest,and N1 treatment got the highest seed yield.The result indicated that biological-sugar fertilizer promoted the growth and development of soybean nodule and therefore increased soybean seed yield.Results obtained from this experiment will provide theoretical reference for nitrogen nutrition regulation and fertilization of high-yield soybean.