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| Effects of biochar and nitrogen fertilizer combination on the physical and chemical properties of rice soil and crop nitrogen efficiency |
| Received:June 27, 2024 |
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| KeyWord:biochar;rice;physical and chemical properties of soil;composition of output;nitrogen efficiency |
| Author Name | Affiliation | E-mail | | GUO Yaxin | College of Agronomy, Shenyang Agricultural University, Shenyang 110866, China
Key Laboratory of Biochar and Soil Improvement, Ministry of Agriculture and Rural Affairs, Shenyang 110866, China | | | YANG Jingxiu | College of Agronomy, Shenyang Agricultural University, Shenyang 110866, China
Key Laboratory of Biochar and Soil Improvement, Ministry of Agriculture and Rural Affairs, Shenyang 110866, China | | | HAN Yufang | College of Agronomy, Shenyang Agricultural University, Shenyang 110866, China
Key Laboratory of Biochar and Soil Improvement, Ministry of Agriculture and Rural Affairs, Shenyang 110866, China | | | WANG Di | College of Agronomy, Shenyang Agricultural University, Shenyang 110866, China
Key Laboratory of Biochar and Soil Improvement, Ministry of Agriculture and Rural Affairs, Shenyang 110866, China | | | CAO Dianyun | College of Agronomy, Shenyang Agricultural University, Shenyang 110866, China
Key Laboratory of Biochar and Soil Improvement, Ministry of Agriculture and Rural Affairs, Shenyang 110866, China | | | MENG Jun | College of Agronomy, Shenyang Agricultural University, Shenyang 110866, China
Key Laboratory of Biochar and Soil Improvement, Ministry of Agriculture and Rural Affairs, Shenyang 110866, China | | | CHEN Wenfu | College of Agronomy, Shenyang Agricultural University, Shenyang 110866, China
Key Laboratory of Biochar and Soil Improvement, Ministry of Agriculture and Rural Affairs, Shenyang 110866, China | | | LAN Yu | College of Agronomy, Shenyang Agricultural University, Shenyang 110866, China
Key Laboratory of Biochar and Soil Improvement, Ministry of Agriculture and Rural Affairs, Shenyang 110866, China | lanyu312228@syau.edu.cn |
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| Abstract: |
| The aim of this study was to investigate the impacts of the combined application of biochar and nitrogen fertilizer on the physicochemical properties of paddy soil, nitrogen utilization, and yield formation of rice. The typical paddy soil in Liaoning Province was selected as the research object to conduct a field experiment. There were four experimental treatments：No nitrogen fertilizer（CK）, nitrogen fertilizer alone（N）, biochar alone（BC）, and the combination of nitrogen and biochar（N+BC）. The rice yield was measured after harvest, and the soil was sampled to determine the physical and chemical properties of the soil. The addition of corn stover biochar significantly decreased soil bulk density by 0.04-0.07 g·cm-3 and significantly enhanced soil pH and nutrient content. Among them, the soil organic matter and available phosphorus content were most significantly improved under the treatment of the combination of biochar and nitrogen fertilizer. Compared with the sole application of chemical fertilizers, the combination of corn stover biochar and nitrogen fertilizer significantly increased rice yield, with economic yield, straw yield, and biological yield increasing by 10.03%, 8.70%, and 9.36%, respectively. The addition of biochar to nitrogen fertilizer significantly increased the nitrogen content and accumulation in grains, as well as the nitrogen harvest index of rice. Simultaneously, the nitrogen fertilizer utilization efficiency, partial productivity, and soil nitrogen dependence rate of rice were significantly enhanced by 2.09 percentage points, 5.47 kg·kg-1, and 2.44 percentage points, respectively. The combination of biochar and nitrogen fertilizer is conducive to enhancing soil fertility levels, thereby significantly increasing nitrogen accumulation and yield of rice. |
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