Assessment of productivity, nutrient uptake and economic benefits of rice under different nitrogen management strategies
Background Integrating a chemical nitrogen (N) fertilizer with an organic fertilizer and using slow-release mechanism are important N management strategies to increase the N utilization efficiency (NUE) and grain yield of rice. However, the performances of both N management strategies on the product...
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PeerJ Inc.
2020-07-01
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| author | Guoying Yang Hongting Ji Hongjiang Liu Yuefang Zhang Liugen Chen Jianchu Zheng Zhi Guo Jing Sheng |
| author_facet | Guoying Yang Hongting Ji Hongjiang Liu Yuefang Zhang Liugen Chen Jianchu Zheng Zhi Guo Jing Sheng |
| author_sort | Guoying Yang |
| collection | DOAJ |
| description | Background Integrating a chemical nitrogen (N) fertilizer with an organic fertilizer and using slow-release mechanism are important N management strategies to increase the N utilization efficiency (NUE) and grain yield of rice. However, the performances of both N management strategies on the productivity, the nutrient absorption and utilization efficiency, and the economic benefits of rice have not yet been comprehensively evaluated. Methods A 2-year field experiment was conducted with seven N management strategies without fertilizer (control), 100% conventional N fertilizer (conventional compound fertilizer and urea) (N100), 75% conventional N fertilizer with 25% organic–inorganic compound fertilizer (N75+OICF25), 50% conventional N fertilizer with 50% organic–inorganic compound fertilizer (N50+OICF50), 100% organic–inorganic compound fertilizer (OICF100), slow-release compound fertilizer with urea (SRCF+U), compound fertilizer with sulfur-coated urea (CF+SCU). The responses of the productivity, the nutrient absorption and utilization efficiency, and the economic benefits of rice to the different N management strategies were evaluated. Results CF+SCU performed comparably or better than N100, judging by the grain yield (GY), the N, phosphate (P) and potassium (K) agronomic efficiency (NAE, PAE and KAE), and the apparent N, P and K recovery efficiency (ANRE, APRE and AKRE). SRCF+U significantly increased the GY by an average of 7.7%, the NAE and the ANRE by 23.8 and 26.7%, the PAE and the APRE by 90.6 and 109.3%, and the KAE and the AKRE by 74.2 and 57.7%. The higher GY and nutrient utilization efficiency when using SRCF+U were attributed to the higher total biomass and total nutrient absorption. N75+OICF25 and N50+OICF50 produced a comparable grain yield than N100, whereas a significant yield reduction was observed when using OICF100. Compared with N100, N75+OICF25 resulted in a comparable or higher fertilizer use efficiency (0.3 and 4.7% for NAE and ANRE, 0.3 and 3.2% for PAE and APRE, 0.3 and −2.8% for KAE and AKRE). However, the fertilizer use efficiency when using N50+OICF50 and OICF100 were lower than with N100. The highest net return (NR) (5,845.03 yuan ha−1) and benefit to cost (B:C) ratio (0.34) were obtained when using SRCF+U. The NR and the B:C ratio when using N75+OICF25 were slightly higher than when using N100. However, N50+OICF50 and OICF100 significantly decreased the NR and the B:C ratio compared with N100 by 14.5 and 12.1% and by 35.1 and 29.0%, respectively. Conclusions SRCF+U and CF+SCU enhanced the crop productivity, the nutrient uptake and utilization efficiency, and the economic benefits compared with N100. The comprehensive performance of SRCF+U was better than that of CF+SCU. N75+OICF25 produced almost similar productivity, nutrient uptake and use efficiency compared with N100. It demonstrated that N75+OICF25 stabilized the grain yield production of rice and reduced the input of chemical N fertilizer. |
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| spelling | doaj.art-9f81becbf3f343358421a7f57d857e1c2023-12-03T11:04:57ZengPeerJ Inc.PeerJ2167-83592020-07-018e959610.7717/peerj.9596Assessment of productivity, nutrient uptake and economic benefits of rice under different nitrogen management strategiesGuoying Yang0Hongting Ji1Hongjiang Liu2Yuefang Zhang3Liugen Chen4Jianchu Zheng5Zhi Guo6Jing Sheng7Circular Agriculture Research Center, Jiangsu Academy of Agricultural Sciences, Nanjing, Jiangsu, ChinaNanjing Institute of Agricultural Sciences in Jiangsu Hilly Area, Jiangsu Academy of Agricultural Sciences, Nanjing, Jiangsu, ChinaCircular Agriculture Research Center, Jiangsu Academy of Agricultural Sciences, Nanjing, Jiangsu, ChinaCircular Agriculture Research Center, Jiangsu Academy of Agricultural Sciences, Nanjing, Jiangsu, ChinaCircular Agriculture Research Center, Jiangsu Academy of Agricultural Sciences, Nanjing, Jiangsu, ChinaCircular Agriculture Research Center, Jiangsu Academy of Agricultural Sciences, Nanjing, Jiangsu, ChinaCircular Agriculture Research Center, Jiangsu Academy of Agricultural Sciences, Nanjing, Jiangsu, ChinaCircular Agriculture Research Center, Jiangsu Academy of Agricultural Sciences, Nanjing, Jiangsu, ChinaBackground Integrating a chemical nitrogen (N) fertilizer with an organic fertilizer and using slow-release mechanism are important N management strategies to increase the N utilization efficiency (NUE) and grain yield of rice. However, the performances of both N management strategies on the productivity, the nutrient absorption and utilization efficiency, and the economic benefits of rice have not yet been comprehensively evaluated. Methods A 2-year field experiment was conducted with seven N management strategies without fertilizer (control), 100% conventional N fertilizer (conventional compound fertilizer and urea) (N100), 75% conventional N fertilizer with 25% organic–inorganic compound fertilizer (N75+OICF25), 50% conventional N fertilizer with 50% organic–inorganic compound fertilizer (N50+OICF50), 100% organic–inorganic compound fertilizer (OICF100), slow-release compound fertilizer with urea (SRCF+U), compound fertilizer with sulfur-coated urea (CF+SCU). The responses of the productivity, the nutrient absorption and utilization efficiency, and the economic benefits of rice to the different N management strategies were evaluated. Results CF+SCU performed comparably or better than N100, judging by the grain yield (GY), the N, phosphate (P) and potassium (K) agronomic efficiency (NAE, PAE and KAE), and the apparent N, P and K recovery efficiency (ANRE, APRE and AKRE). SRCF+U significantly increased the GY by an average of 7.7%, the NAE and the ANRE by 23.8 and 26.7%, the PAE and the APRE by 90.6 and 109.3%, and the KAE and the AKRE by 74.2 and 57.7%. The higher GY and nutrient utilization efficiency when using SRCF+U were attributed to the higher total biomass and total nutrient absorption. N75+OICF25 and N50+OICF50 produced a comparable grain yield than N100, whereas a significant yield reduction was observed when using OICF100. Compared with N100, N75+OICF25 resulted in a comparable or higher fertilizer use efficiency (0.3 and 4.7% for NAE and ANRE, 0.3 and 3.2% for PAE and APRE, 0.3 and −2.8% for KAE and AKRE). However, the fertilizer use efficiency when using N50+OICF50 and OICF100 were lower than with N100. The highest net return (NR) (5,845.03 yuan ha−1) and benefit to cost (B:C) ratio (0.34) were obtained when using SRCF+U. The NR and the B:C ratio when using N75+OICF25 were slightly higher than when using N100. However, N50+OICF50 and OICF100 significantly decreased the NR and the B:C ratio compared with N100 by 14.5 and 12.1% and by 35.1 and 29.0%, respectively. Conclusions SRCF+U and CF+SCU enhanced the crop productivity, the nutrient uptake and utilization efficiency, and the economic benefits compared with N100. The comprehensive performance of SRCF+U was better than that of CF+SCU. N75+OICF25 produced almost similar productivity, nutrient uptake and use efficiency compared with N100. It demonstrated that N75+OICF25 stabilized the grain yield production of rice and reduced the input of chemical N fertilizer.https://peerj.com/articles/9596.pdfOrganic–inorganic compound fertilizerCrop productivityNutrient use efficiencyEconomic benefitPrincipal component analysisSustainability |
| spellingShingle | Guoying Yang Hongting Ji Hongjiang Liu Yuefang Zhang Liugen Chen Jianchu Zheng Zhi Guo Jing Sheng Assessment of productivity, nutrient uptake and economic benefits of rice under different nitrogen management strategies PeerJ Organic–inorganic compound fertilizer Crop productivity Nutrient use efficiency Economic benefit Principal component analysis Sustainability |
| title | Assessment of productivity, nutrient uptake and economic benefits of rice under different nitrogen management strategies |
| title_full | Assessment of productivity, nutrient uptake and economic benefits of rice under different nitrogen management strategies |
| title_fullStr | Assessment of productivity, nutrient uptake and economic benefits of rice under different nitrogen management strategies |
| title_full_unstemmed | Assessment of productivity, nutrient uptake and economic benefits of rice under different nitrogen management strategies |
| title_short | Assessment of productivity, nutrient uptake and economic benefits of rice under different nitrogen management strategies |
| title_sort | assessment of productivity nutrient uptake and economic benefits of rice under different nitrogen management strategies |
| topic | Organic–inorganic compound fertilizer Crop productivity Nutrient use efficiency Economic benefit Principal component analysis Sustainability |
| url | https://peerj.com/articles/9596.pdf |
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