| Impact of different fertilization modes on soil nitrate nitrogen distribution and maize yield in border irrigation systems of Inner Mongolia’s Yellow River Diversion Irrigation District |
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| DOI：10.7606/j.issn.1000-7601.2025.06.19 |
| Key Words: summer maize irrigation and fertilization fertilization mode soil nitrate nitrogen yield |
| Author Name | Affiliation | | MA Yujing | College of Water Conservancy Engineering, Tianjin Agricultural University, Tianjin 300392, China
Tianjin Agricultural University, China Agricultural University Joint Smart Water Conservancy Research Center, Tianjin 300392, China | | ZHOU Qingyun | College of Water Conservancy Engineering, Tianjin Agricultural University, Tianjin 300392, China
Tianjin Agricultural University, China Agricultural University Joint Smart Water Conservancy Research Center, Tianjin 300392, China | | MO Yan | State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, China Institute of Water Resources and Hydropower Research, Beijing 100083, China | | ZHANG Dequan | Ordos Water Conservancy Development Center, Ordos, Inner Mongolia 017000, China | | LV Ping’an | College of Water Conservancy Engineering, Tianjin Agricultural University, Tianjin 300392, China
Tianjin Agricultural University, China Agricultural University Joint Smart Water Conservancy Research Center, Tianjin 300392, China | | XIAN Jianchun | College of Water Conservancy Engineering, Tianjin Agricultural University, Tianjin 300392, China
Tianjin Agricultural University, China Agricultural University Joint Smart Water Conservancy Research Center, Tianjin 300392, China | | LI Menghang | College of Water Conservancy Engineering, Tianjin Agricultural University, Tianjin 300392, China
Tianjin Agricultural University, China Agricultural University Joint Smart Water Conservancy Research Center, Tianjin 300392, China |
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| Abstract: |
| To explore suitable irrigation and fertilization modes for summer maize border irrigation in the Yellow River diversion irrigation area of Inner Mongolia, a field experiment was conducted from 2023 to 2024 in the irrigation district on the south bank of the Yellow River. Two fertilization methods—liquid fertilization and broadcast fertilization—were set up, with a focus on analyzing the effects of different fertilization modes under liquid fertilization (full liquid fertilizer application, first\|half liquid fertilizer application, and second\|half liquid fertilizer application) and broadcast fertilization (traditional fertilization) on soil water\|nitrogen distribution, crop growth dynamics, and water\|fertilizer use efficiency. The results showed that the soil moisture distribution patterns are consistent across different fertilization modes, while the distribution of nitrate nitrogen showed significant variations. Compared with broadcast fertilization, liquid fertilization resulted in lower variability and higher uniformity in nitrate nitrogen distribution. The coefficient of variation for full liquid fertilizer application ranged from 0.2 to 0.6, whereas broadcast fertilization had a higher coefficient of variation (0.6~0.7). Full liquid fertilizer application achieved the highest uniformity in nitrate nitrogen distribution. Different fertilization methods had minimal effects on maize growth indicators such as plant height and stem diameter but significantly influenced yield\|related traits at maturity. Based on fertilizer distribution uniformity and yield\|increasing benefits, in 2023 and 2024, the water use efficiency of corn under full liquid application fertilizer reached 2.59 kg·m-3 and 2.71 kg·m-3 respectively, which were the highest among all treatments. Additionally, the partial factor productivity of nitrogen fertilizer was also higher than other treatments, reaching 51.60 kg·kg-1 and 51.40 kg·kg-1 respectively. Full liquid fertilizer application demonstrated the highest water\|fertilizer use efficiency and was identified as the optimal fertilization mode. It follows that liquid fertilization can improve the uniformity of nitrate nitrogen distribution, reduce nitrogen leaching, and create a soil water\|nitrogen distribution state that facilitates efficient absorption and utilization by the crop root zone, thereby achieving higher yields. |
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