Application effects of fertilizer recommendation by Nutrient Expert System on radish].

A field experiment was conducted for two seasons to evaluate the application effects of a decision support system named Nutrient Expert on radish based on yield response and agronomic efficiency, to provide theoretical and technical support for convenient and quick recommendation on fertilization management. There were seven treatments: farmer's practice treatment (FP), recommended fertilization treatment based on Nutrient Expert (TE), recommended fertilization treatment based on soil testing (TS), treatment of replacing 30% nitrogen fertilizer with organic fertilizer based on TE (TE+OM), and corresponding nitrogen omission treatment (TE-N), phosphorus omission treatment (TE-P), and potassium omission treatment (TE-K). We measured and compared the effects of different fertilization managements on radish yield, nutrient uptake, fertilizer utilization and fertilization benefit. The results showed that the N, P2O5 and K2O fertilizer applications based on Nutrient Expert were 200, 132 and 215 kg·hm-2 in the first half of the year, and 171, 204 and 251 kg·hm-2 in the second half of the year, respectively. The Nutrient Expert recommended fertilization adjusted the application amount of nitrogen, phosphorus, and potassium fertilizer. Compared with FP treatment, the economic yield of radish in the two-season experiments increased by 14.8% and 18.4%, and the profit of fertilization increased by 20115 and 14905 yuan·hm-2, respectively. Compared with the TS treatment, the economic yield of radish over the two seasons increased by 9.8% and 16.8%, and the profit of fertilization increased by 9076 and 9987 yuan·hm-2, respectively. The Nutrient Expert recommended fertilization improved the agronomic efficiency and nutrient recovery efficiency of radish, and promoted the efficient utilization of nutrients. The reasonable proportion of organic fertilizer in radish production could promote the transfer of plant nutrients to roots to a certain extent. In general, the application of Nutrient Expert on radish was feasible. This method could make full use of the indigenous nutrients of soil, consider the balance and sustainable supply, and reasonably regulate the supply of nitrogen, phosphorus and potassium, and finally result in high yield, high efficiency and sustainable development of radish production.

Citation

Nan Shan, Li-Min Chuan, Ji-Pei Liu, Huai-Guo Zheng, Tong-Ke Zhao. Application effects of fertilizer recommendation by Nutrient Expert System on radish]. Ying yong sheng tai xue bao = The journal of applied ecology. 2020 Nov;31(11):3719-3728

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PMID: 33300722

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