Controlled-release N fertilizer to mitigate ammonia volatilization from double-cropping rice
Controlled-release N fertilizer to mitigate ammonia volatilization from double-cropping rice
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DOI：
10.1007/s10705-020-10108-3
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发表时间：
2021-01
影响因子：
3.1
通讯作者：
Chang Tian;Xuan Zhou;Zheli Ding;Qiang Liu;Gui-xian Xie;Jianwei Peng;Xiangmin Rong;Yuping Zhang-Yuping-Zh
中科院分区：
文献类型：
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作者：
Chang Tian;Xuan Zhou;Zheli Ding;Qiang Liu;Gui-xian Xie;Jianwei Peng;Xiangmin Rong;Yuping Zhang-Yuping-Zh
控释氮肥能有效地提高作物产量和氮肥在农业生态系统中的利用率。采用气流封闭箱技术，对南方双季稻田连续3年施用不同控释氮肥后的NH3挥发进行了研究。每年种植早、晚稻（ESR和LSR）。结果表明，ESR中NH3挥发损失总量为25 - 56 kg N ha− 1，LSR中为32 - 61 kg N ha− 1。氮素损失占施氮总量的12 - 29%，在ESR和LSR中分别为12 - 27%。与常规尿素相比，控释氮肥的施用显著降低了氮素累积挥发损失，缓释氮肥和LSR分别降低了20-43%和20-32%。LSR中的CRNF对减少NH3挥发的效果不如ESR。80%施氮量的控释氮肥比100%施氮量的常规尿素具有更高的籽粒产量和氮素表观利用率。控释氮肥能有效减少NH3挥发，提高水稻产量和ANRE。考虑到控释氮肥的价格较高，施用控释氮肥比常规尿素低20%，是一种合理的施肥策略，可提高氮肥利用率和环境效益，促进双季稻生产系统的可持续发展。
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 NH3was 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 NH3volatilization losses ranged from 25 to 56 kg N ha−1in ESR and from 32 to 61 kg N ha−1in 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 NH3volatilization 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 NH3volatilization 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 NH3volatilization, 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.