当前位置: X-MOL 学术Soil Tillage Res. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Nitrogen-fixing cyanobacteria have the potential to improve nitrogen use efficiency through the reduction of ammonia volatilization in red soil paddy fields
Soil and Tillage Research ( IF 6.5 ) Pub Date : 2021-11-29 , DOI: 10.1016/j.still.2021.105274
Xuening Song 1, 2, 3 , Jinli Zhang 1, 3 , Dunhai Li 1 , Chengrong Peng 4
Affiliation  

Nitrogen-fixing cyanobacteria (NFC) biofertilizers have demonstrated great potential in improving rice yield and soil fertility. However, few studies have systematically evaluated the effects of combined application of NFC biofertilizers and chemical nitrogen (N) fertilizer on ammonia (NH3) volatilization and rice N absorption in red soil paddy fields. Therefore, we conducted a 2-year single cropping paddy field study to determine the NH3 volatilization loss from paddy soil, as well as rice yield and N use efficiency (NUE). The experiment designed five treatments, including one control (CK, no N applied) and four experimental treatments (N100, complete application of chemical N fertilization; RN50, replacing half of chemical N fertilizer with NFC; RN100, complete replacement of chemical N fertilizer with NFC; N50, only half application of chemical N fertilizer) based on different chemical N fertilizer and NFC biofertilizers application ratios. The results showed that the average cumulative NH3 volatilization losses of RN50 and N50 treatments were reduced by 41.63% and 45.34% than that of N100 treatment, respectively, mainly due to the reduction of ammonium N content in the overlying water and topsoil. The average NUE of RN50 and N50 treatments were 57.85% and 48.49%, which were 43.83% and 20.56% higher than that of N100, respectively. Path analysis results showed that the application of NFC increased the total soil N content and mitigated the volatilization of NH3, which increased the residence time of N in the paddy field, thereby increasing the NUE of rice. The average rice yield of RN50 was 5603.85 kg ha−1, which was not significantly different from N100, but 18.62% higher than N50. Although RN100 elevated NUE and reduced NH3 volatilization, its grain yield was significantly lower than that of N100. These results suggest that the replacement of an appropriate proportion of chemical N fertilizer with NFC could be a promising approach to mitigating NH3 volatilization, enhancing rice NUE, and maintaining rice yield in red soil paddy fields.



中文翻译:

固氮蓝藻有可能通过减少红壤稻田的氨挥发来提高氮的利用效率

固氮蓝藻 (NFC) 生物肥料在提高水稻产量和土壤肥力方面显示出巨大潜力。然而,很少有研究系统评估NFC生物肥料和化学氮(N)肥联合施用对红壤稻田氨(NH 3)挥发和水稻N吸收的影响。因此,我们进行了为期 2 年的单季稻田研究,以确定 NH 3水稻土壤的挥发损失,以及水稻产量和氮利用效率 (NUE)。试验设计了5个处理,包括1个对照(CK,不施N)和4个试验处理(N100,完全施化氮肥;RN50,NFC替代一半化肥;RN100,完全替代化N肥) NFC;N50,仅施一半化学氮肥)基于不同的化学氮肥和 NFC 生物肥料的施用比例。结果表明,平均累积 NH 3RN50和N50处理的挥发损失比N100处理分别减少了41.63%和45.34%,主要是由于上覆水和表土中铵态氮含量降低所致。RN50和N50处理的平均NUE分别为57.85%和48.49%,分别比N100高43.83%和20.56%。通径分析结果表明,NFC的施用增加了土壤总氮含量,减轻了NH 3的挥发,从而增加了氮在稻田中的停留时间,从而增加了水稻的NUE。RN50的平均水稻产量为5603.85 kg ha -1,与N100无显着差异,但比N50高18.62%。尽管 RN100 提高了 NUE 并降低了 NH 3挥发,其籽粒产量明显低于N100。这些结果表明,用NFC替代适当比例的化学氮肥可能是减轻NH 3挥发、提高水稻NUE和保持红壤稻田水稻产量的一种有前景的方法。

更新日期:2021-11-29
down
wechat
bug