Nitrogen-Reduction in Intensive Cultivation Improved Nitrogen Fertilizer Utilization Efficiency and Soil Nitrogen Mineralization of Double-Cropped Rice
Under the current rice cropping system, excessive nitrogen application has become a major issue that needs to be changed, and nitrogen reduction has become a hot research topic in recent years. The use of optimum planting density is becoming a common agronomic management system in addition to nitrog...
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MDPI AG
2022-04-01
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| Series: | Agronomy |
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| Online Access: | https://www.mdpi.com/2073-4395/12/5/1103 |
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| author | Zhuo Luo Haixing Song Min Huang Zhenhua Zhang Zhi Peng Tao Zi Chang Tian Mamdouh A. Eissa |
| author_facet | Zhuo Luo Haixing Song Min Huang Zhenhua Zhang Zhi Peng Tao Zi Chang Tian Mamdouh A. Eissa |
| author_sort | Zhuo Luo |
| collection | DOAJ |
| description | Under the current rice cropping system, excessive nitrogen application has become a major issue that needs to be changed, and nitrogen reduction has become a hot research topic in recent years. The use of optimum planting density is becoming a common agronomic management system in addition to nitrogen reduction, especially under double cropping rice systems. In this paper, changes in rice yield, nitrogen-use efficiency (NUE) and net N mineralization under dense planting with a reduced nitrogen rate (DPRN) were studied. By comparing DPRN with high-nitrogen sparse planting (SPHN), we found that the population tiller number (tiller number per unit area) increased by 9–27% under DPRN cultivation. Nitrogen accumulation under DPRN treatment of double-cropped rice was basically stable. NUE under DPRN was significantly higher by 1.3–22.7% compared to SPHN. The partial factor productivity of applied N (PFP<sub>N</sub>) was significantly higher than that of SPHN, with an increase of 4.3–22.8%. The net N mineralized of double-cropped rice under DPRN increased at different stages, and the increase in late-season rice (LSR) was greater than that of early-season rice (ESR). The highest net N mineralized in double cropping rice at different stages was found in the dense planting treatment (DP) and N<sub>2</sub> (120 kg N h<sup>−1</sup>). In conclusion, DPRN cultivation of double-cropped rice could be accepted as a proper management strategy for reducing nitrogen input, improving NUE and promoting soil nitrogen mineralization under given conditions. |
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| institution | Directory Open Access Journal |
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| last_indexed | 2024-03-10T03:30:21Z |
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| series | Agronomy |
| spelling | doaj.art-85fe4395b61c403cba2b75c2681d4ff42023-11-23T09:42:50ZengMDPI AGAgronomy2073-43952022-04-01125110310.3390/agronomy12051103Nitrogen-Reduction in Intensive Cultivation Improved Nitrogen Fertilizer Utilization Efficiency and Soil Nitrogen Mineralization of Double-Cropped RiceZhuo Luo0Haixing Song1Min Huang2Zhenhua Zhang3Zhi Peng4Tao Zi5Chang Tian6Mamdouh A. Eissa7Hunan Provincial Key Laboratory of Farmland Pollution Control and Agricultural Resources Use, Hunan Provincial Key Laboratory of Plant Nutrition in Common University, College of Resources and Environment, Hunan Agricultural University, Changsha 410128, ChinaHunan Provincial Key Laboratory of Farmland Pollution Control and Agricultural Resources Use, Hunan Provincial Key Laboratory of Plant Nutrition in Common University, College of Resources and Environment, Hunan Agricultural University, Changsha 410128, ChinaState Key Laboratory of Hybrid Rice, Hunan Agricultural University, Changsha 410128, ChinaHunan Provincial Key Laboratory of Farmland Pollution Control and Agricultural Resources Use, Hunan Provincial Key Laboratory of Plant Nutrition in Common University, College of Resources and Environment, Hunan Agricultural University, Changsha 410128, ChinaHunan Provincial Key Laboratory of Farmland Pollution Control and Agricultural Resources Use, Hunan Provincial Key Laboratory of Plant Nutrition in Common University, College of Resources and Environment, Hunan Agricultural University, Changsha 410128, ChinaHunan Biological and Electromechanical Polytechnic, Changsha 410127, ChinaHunan Provincial Key Laboratory of Farmland Pollution Control and Agricultural Resources Use, Hunan Provincial Key Laboratory of Plant Nutrition in Common University, College of Resources and Environment, Hunan Agricultural University, Changsha 410128, ChinaDepartment of Soils and Water, Faculty of Agriculture, Assiut University, Assiut 71526, EgyptUnder the current rice cropping system, excessive nitrogen application has become a major issue that needs to be changed, and nitrogen reduction has become a hot research topic in recent years. The use of optimum planting density is becoming a common agronomic management system in addition to nitrogen reduction, especially under double cropping rice systems. In this paper, changes in rice yield, nitrogen-use efficiency (NUE) and net N mineralization under dense planting with a reduced nitrogen rate (DPRN) were studied. By comparing DPRN with high-nitrogen sparse planting (SPHN), we found that the population tiller number (tiller number per unit area) increased by 9–27% under DPRN cultivation. Nitrogen accumulation under DPRN treatment of double-cropped rice was basically stable. NUE under DPRN was significantly higher by 1.3–22.7% compared to SPHN. The partial factor productivity of applied N (PFP<sub>N</sub>) was significantly higher than that of SPHN, with an increase of 4.3–22.8%. The net N mineralized of double-cropped rice under DPRN increased at different stages, and the increase in late-season rice (LSR) was greater than that of early-season rice (ESR). The highest net N mineralized in double cropping rice at different stages was found in the dense planting treatment (DP) and N<sub>2</sub> (120 kg N h<sup>−1</sup>). In conclusion, DPRN cultivation of double-cropped rice could be accepted as a proper management strategy for reducing nitrogen input, improving NUE and promoting soil nitrogen mineralization under given conditions.https://www.mdpi.com/2073-4395/12/5/1103nitrogen reductiondense plantingyieldnitrogen use efficiencysoil net mineralized nitrogen |
| spellingShingle | Zhuo Luo Haixing Song Min Huang Zhenhua Zhang Zhi Peng Tao Zi Chang Tian Mamdouh A. Eissa Nitrogen-Reduction in Intensive Cultivation Improved Nitrogen Fertilizer Utilization Efficiency and Soil Nitrogen Mineralization of Double-Cropped Rice Agronomy nitrogen reduction dense planting yield nitrogen use efficiency soil net mineralized nitrogen |
| title | Nitrogen-Reduction in Intensive Cultivation Improved Nitrogen Fertilizer Utilization Efficiency and Soil Nitrogen Mineralization of Double-Cropped Rice |
| title_full | Nitrogen-Reduction in Intensive Cultivation Improved Nitrogen Fertilizer Utilization Efficiency and Soil Nitrogen Mineralization of Double-Cropped Rice |
| title_fullStr | Nitrogen-Reduction in Intensive Cultivation Improved Nitrogen Fertilizer Utilization Efficiency and Soil Nitrogen Mineralization of Double-Cropped Rice |
| title_full_unstemmed | Nitrogen-Reduction in Intensive Cultivation Improved Nitrogen Fertilizer Utilization Efficiency and Soil Nitrogen Mineralization of Double-Cropped Rice |
| title_short | Nitrogen-Reduction in Intensive Cultivation Improved Nitrogen Fertilizer Utilization Efficiency and Soil Nitrogen Mineralization of Double-Cropped Rice |
| title_sort | nitrogen reduction in intensive cultivation improved nitrogen fertilizer utilization efficiency and soil nitrogen mineralization of double cropped rice |
| topic | nitrogen reduction dense planting yield nitrogen use efficiency soil net mineralized nitrogen |
| url | https://www.mdpi.com/2073-4395/12/5/1103 |
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