Excessive fertilization has led to nutrient use inefficiency and serious environmental consequences for radish cultivation in North China. The Nutrient Expert (NE) system is a science-based, site-specific fertilization decision support system, but the updated NE system for radish has rarely been evaluated. This study aims to validate the feasibility of NE for radish fertilization management from agronomic, economic, and environmental perspectives. A total of 46 field experiments were conducted over four seasons from April 2018 to November 2019 across the major radish growing regions in North China. The results indicated that NE significantly reduced N, P2O5, and K2O application rates by 98, 110, and 47 kg ha?1 relative to those in the farmers' practice (FP), respectively, and reduced N and P2O5 inputs by 48 and 44 kg ha?1, respectively, while maintaining the same K2O rate as soil testing (ST). Relative to FP and ST, NE significantly increased radish yield by 2.7 and 2.6 t ha?1 (4.2 and 4.0％) and net returns by 837 and 432 USD ha?1, respectively. On average, NE significantly improved the agronomic efficiency (AE) of N, P, and K (relative to FP and ST) by 42.4 and 31.0, 67.4 kg kg?1 and 50.9, and 20.3 and 12.3 kg kg?1; enhanced the recovery efficiency (RE) of N, P, and K by 11.4 and 7.0, 14.1 and 7.5, and 11.3 and 6.3 percentage points; and increased the partial factor productivity (PFP) of N, P, and K by 162.9 and 96.8, 488.0 and 327.3, and 86.9 and 22.4 kg kg?1, respectively. Furthermore, NE substantially reduced N and P2O5 surpluses by 105.1 and 115.1 kg ha?1, respectively, and decreased apparent N loss by 110.8 kg ha?1 compared to FP. These results indicated that the NE system is an effective and feasible approach for improving NUE and promoting cleaner radish production in North China.

ZHANG Jia-jia;DING Wen-cheng;CUI Rong-zong;LI Ming-yue;Sami ULLAH;HE Ping

Key Laboratory of Plant Nutrition and Fertilizer,Ministry of Agriculture and Rural Affairs/Institute of Agricultural Resources and Regional Planning,Chinese Academy of Agricultural Sciences,Beijing 100081,P.R.China;Institute of Plant Nutrition,Resources and Environment,Beijing Academy of Agriculture and Forestry Sciences,Beijing 100097,P.R.China;Institute of Agricultural Resources and Environment,Shandong Academy of Agricultural Sciences,Jinan 250100,P.R.China;Tianjin Institute of Agricultural Resources and Environment,Tianjin 300192,P.R.China;Department of Biology,University of Okara,Okara 56130,Pakistan

农业科学学报（英文）

[1]ZHANG Jia-jia;DING Wen-cheng;CUI Rong-zong;LI Ming-yue;Sami ULLAH;HE Ping-.The Nutrient Expert decision support system improves nutrient use efficiency and environmental performance of radish in North China)[J].农业科学学报（英文）,2022(05):1501-1512

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