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Controlled-release N fertilizer to mitigate ammonia volatilization from double-cropping rice
Nutrient Cycling in Agroecosystems ( IF 3.1 ) Pub Date : 2021-01-04 , DOI: 10.1007/s10705-020-10108-3
Chang Tian , Xuan Zhou , Zheli Ding , Qiang Liu , Guixian Xie , Jianwei Peng , Xiangming Rong , Yuping Zhang , Yong Yang , Mamdouh A. Eissa

Controlled-release nitrogen fertilizer (CRNF) can effectively enhance crop yields and raise the efficiency of nitrogen fertilizer in agroecosystems. In the present study, the volatilization of NH3 was determined by airflow enclosure chamber technique after the application of different CRNF rates in double-cropping rice fields in southern China for continuous 3 years. The early and late season rice (ESR and LSR) were cultivated each year. The results showed that the total NH3 volatilization losses ranged from 25 to 56 kg N ha−1 in ESR and from 32 to 61 kg N ha−1 in LSR. The loss of N to the total applied N ranged from 12 to 29% in ESR and from 12 to 27% in LSR. The application of CRNF significantly reduced the cumulative NH3 volatilization losses by 20–43% for ESR and by 20–32% for LSR compared with conventional urea application. CRNF in LSR was less effective to reduce NH3 volatilization than that in ESR. Furthermore, the application of 80% of N rate in the form of CRNF gave higher grain yield and apparent nitrogen recovery efficiency (ANRE) than that of application of 100% of N rate from conventional urea. CRNF can effectively reduce NH3 volatilization, and increase rice yield and ANRE. Considering higher price of CRNF, the application of CRNF at lower (20% applied N) rate than conventional urea in LSR may be a reasonable fertilization strategy for improving N use efficiency, environment effectiveness, and sustaining the development of rice production systems in double-cropping rice.



中文翻译:

控释氮肥可减轻双季稻氨气挥发

控释氮肥(CRNF)可以有效地提高农作物产量,并提高农业生态系统中氮肥的效率。在本研究中,连续3年在南方双季稻田应用不同CRNF比率后,通过气流封闭室技术确定了NH 3的挥发。每年都要种植早稻和晚稻(ESR和LSR)。结果表明,ESR中的总NH 3挥发损失为25至56 kg N ha -1,而LSR中为32至61 kg N ha -1。在ESR中,N对总施用N的损失为12%至29%,在LSR中为12%至27%。CRNF的应用显着降低了累积的NH与常规尿素相比,ESR 3的挥发损失降低了20–43%,LSR的挥发损失降低了20–32%。与ESR相比,LSR中的CRNF在减少NH 3挥发方面效果较差。此外,与从常规尿素中施用100%的氮肥相比,以CRNF形式施用80%的氮肥能提高谷物的产量和表观氮回收效率(ANRE)。CRNF可以有效减少NH 3挥发,提高水稻产量和ANRE。考虑到CRNF的价格较高,在LSR中以比常规尿素低(20%的施氮量)施用CRNF可能是一种合理的施肥策略,可以提高氮的利用效率,环境效益并维持水稻生产系统的双发。种植水稻。

更新日期:2021-01-04
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