| Effects of combined application of organic and inorganic fertilizers on inorganic nitrogen movement and maize growth in salinity soils |
|
View Fulltext View/Add Comment Download reader |
| |
| DOI：10.7606/j.issn.1000-7601.2025.02.11 |
| Key Words: summer maize salinity soil combined application of organic and inorganic fertilizers inorganic nitrogen movement nitrogen use efficiency |
| Author Name | Affiliation | | KUANG Yuxin | The Research Center of Soil and Water Conservation and Ecological Environment, Chinese Academy of Sciences and Ministry of Education, Yangling, Shaanxi 712100, China
Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling, Shaanxi 712100, China
University of Chinese Academy of Sciences, Beijing 100049, China | | ZHANG Tibin | The Research Center of Soil and Water Conservation and Ecological Environment, Chinese Academy of Sciences and Ministry of Education, Yangling, Shaanxi 712100, China
Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling, Shaanxi 712100, China
University of Chinese Academy of Sciences, Beijing 100049, China | | CHENG Yu | College of Water Resources and Civil Engineering, Northwest A＆F University, Yangling, Shaanxi 712100, China | | GAO Weiqiang | College of Water Resources and Civil Engineering, Northwest A＆F University, Yangling, Shaanxi 712100, China | | LIANG Qing | College of Water Resources and Civil Engineering, Northwest A＆F University, Yangling, Shaanxi 712100, China | | TONG Jiankang | College of Water Resources and Civil Engineering, Northwest A＆F University, Yangling, Shaanxi 712100, China | | FENG Hao | The Research Center of Soil and Water Conservation and Ecological Environment, Chinese Academy of Sciences and Ministry of Education, Yangling, Shaanxi 712100, China
Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling, Shaanxi 712100, China
University of Chinese Academy of Sciences, Beijing 100049, China | | YU Mingjun | Shaanxi Province Agricultural Reclamation Group Chaoyi Farm CO., Ltd., Dali, Shaanxi 715100, China |
|
| Hits: 4 |
| Download times: 1 |
| Abstract: |
| To address the challenges of improper fertilizer application and low nitrogen use efficiency in salinized farmland, this study investigated the effects of combined organic and inorganic fertilizer application on soil nitrogen dynamics and crop growth. The research focused on salinized farmland in the Weibei area, using a consistent nitrogen application rate of 240 kg·hm-2. A no\|fertilizer treatment (CK) served as the control, and five combined application ratios of organic fertilizer were tested with three replicates: 0% (OF0), 25% (OF1), 50% (OF2), 75% (OF3), and 100% (OF4). We then analyzed the effects of soil nitrate and ammonium nitrogen content, crop growth, and nitrogen use efficiency during different growth stages of maize. The results indicated: （1） Compared with OF0, the application of nitrogen fertilizer (OF1~OF4) increased the average nitrate\|nitrogen content of the soil in the 0~40 cm layer by 32.95%. Among them, OF3 significantly increased the nitrate\|nitrogen content of the 0~20 cm layer by 52.32% (P<0.05). （2）With the increase of the proportion of organic fertilizer, the maize plant height, leaf area index (LAI), and dry matter showed a trend of increasing and then decreasing, OF1 and OF2 showed the best growth of maize, and the yield were significantly increased by 18.29% and 10.90% (P<0.05), respectively, compared with OF0. （3）At the maturity stage, the nitrogen content of grains in OF1 and OF2 were significantly increased by 23.8% and 18.5% (P<0.05), and the nitrogen accumulation of grains was increased by 1.47% and 12.03% (P<0.05), respectively, compared with OF0. （4）Compared with OF0, all combined application of organic and inorganic treatments increased maize nitrogen agronomic efficiency, nitrogen fertilizer bias productivity, nitrogen fertilizer contribution rate and nitrogen fertilizer apparent utilization rate to different extents, OF1 and OF2 reaching significant differences with the rest of the treatments (P<0.05). In summary, under equal nitrogen conditions, replacing 25% of chemical nitrogen with organic nitrogen is a practical fertilization strategy for salinized farmland in the Weibei region. |
|
|
|