| Optimization of maize water and nitrogen under the condition of integrated water and fertilizer in the irrigation area along the Yellow River |
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| DOI：10.7606/j.issn.1000-7601.2024.06.15 |
| Key Words: water and nitrogen optimization water and nitrogen production function drip irrigation and fertilization irrigation district along the Yellow river |
| Author Name | Affiliation | | MIAO Shilong | Inner Mongolia Agricultural University, College of Water Resources and Civil Engineering, Hohhot, Inner Mongolia 010018, China
Inner Mongolia Autonomous Region Engineering Research Center for Efficient Water\|Saving Technology and Equipment and Soil and Water Environment Effect, Hohhot, Inner Mongolia 010018, China
Inner Mongolia Key Laboratory of Ecohydrology and High\|Efficient Utilization of Water Resources, Hohhot, Inner Mongolia 010018, China | | LI Xianyue | Inner Mongolia Agricultural University, College of Water Resources and Civil Engineering, Hohhot, Inner Mongolia 010018, China
Inner Mongolia Autonomous Region Engineering Research Center for Efficient Water\|Saving Technology and Equipment and Soil and Water Environment Effect, Hohhot, Inner Mongolia 010018, China
Inner Mongolia Key Laboratory of Ecohydrology and High\|Efficient Utilization of Water Resources, Hohhot, Inner Mongolia 010018, China | | SHI Haibin | Inner Mongolia Agricultural University, College of Water Resources and Civil Engineering, Hohhot, Inner Mongolia 010018, China
Inner Mongolia Autonomous Region Engineering Research Center for Efficient Water\|Saving Technology and Equipment and Soil and Water Environment Effect, Hohhot, Inner Mongolia 010018, China
Inner Mongolia Key Laboratory of Ecohydrology and High\|Efficient Utilization of Water Resources, Hohhot, Inner Mongolia 010018, China | | YAN Jianwen | Inner Mongolia Agricultural University, College of Water Resources and Civil Engineering, Hohhot, Inner Mongolia 010018, China
Inner Mongolia Autonomous Region Engineering Research Center for Efficient Water\|Saving Technology and Equipment and Soil and Water Environment Effect, Hohhot, Inner Mongolia 010018, China
Inner Mongolia Key Laboratory of Ecohydrology and High\|Efficient Utilization of Water Resources, Hohhot, Inner Mongolia 010018, China | | DING Shijie | Inner Mongolia Agricultural University, College of Water Resources and Civil Engineering, Hohhot, Inner Mongolia 010018, China
Inner Mongolia Autonomous Region Engineering Research Center for Efficient Water\|Saving Technology and Equipment and Soil and Water Environment Effect, Hohhot, Inner Mongolia 010018, China
Inner Mongolia Key Laboratory of Ecohydrology and High\|Efficient Utilization of Water Resources, Hohhot, Inner Mongolia 010018, China | | LIU Hongxing | Inner Mongolia Agricultural University, College of Water Resources and Civil Engineering, Hohhot, Inner Mongolia 010018, China
Inner Mongolia Autonomous Region Engineering Research Center for Efficient Water\|Saving Technology and Equipment and Soil and Water Environment Effect, Hohhot, Inner Mongolia 010018, China
Inner Mongolia Key Laboratory of Ecohydrology and High\|Efficient Utilization of Water Resources, Hohhot, Inner Mongolia 010018, China | | MIAO Ping | Ordos City River and Lake Protection Center, Ordos， Inner Mongolia 017200, China |
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| Abstract: |
| To further enhance water and nitrogen use efficiency in the irrigation areas on the southern bank of the Yellow River and achieve the goal of significant water and fertilizer conservation in farmland, an experiment on groundwater nitrogen control under drip irrigation was conducted in Garangtu Town, Hangjin Banner, Ordos City, in 2023. The study examined the effects of various water and nitrogen treatments on maize yield and water and nitrogen use efficiency under drip irrigation, with the aim of optimizing the water and nitrogen application rates. The results showed under the medium nitrogen treatment the yield of maize increased by 23.3%, the water use efficiency increased by 7.14%, and the partial productivity of nitrogen fertilizer decreased by 18.3% when compared with low nitrogen treatment. When comparing with the high nitrogen treatment, the medium nitrogen treatment, the yield of maize increased by 2.8%, and the water use efficiency increased by 7.7%, and the partial productivity of nitrogen fertilizer increased by 38.1%. Under the same fertilization condition, the yield, water use efficiency and nitrogen partial productivity of maize under middle water treatment increased by 37.1%, 26.1% and 16.6% when compared with low water treatment. The yield increased by 12.8%, water use efficiency and nitrogen partial productivity increased by 38.3% and 12.9% under the higher water treatment. Three sets of regression models were established between irrigation amount, nitrogen application amount, corn yield, water use efficiency and nitrogen partial productivity. Through optimization, three sets of water and nitrogen intervals were obtained, and their intersection was taken. The optimal interval of total water and nitrogen use in the growing period was 1 800~2 046 m3·hm-2 and 210~249.2 kg·hm-2, which both met high yield and high water and nitrogen use efficiency. The water and nitrogen production function based on Jensen model was used to allocate the optimal range of total water and nitrogen consumption in each growth period, and the water and nitrogen system in each growth period under drip irrigation was rationally allocated. The research results can provide reference for water and fertilizer management models and plans for maize planting in the irrigation area along the southern bank of the Yellow River. |
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