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| DOI：10.13522/j.cnki.ggps.2022081 |
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| Effects of Intelligent Irrigation Fertilization on Water and Nitrogen Use Efficiency of Greenhouse Tomato |
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MENG Fanchao, LYU Haofeng, DONG Jing, HE Shipeng, LI Fei, LIU Qinghua, LIANG Bin
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1. College of Resources and Environmental Sciences, Qingdao Agricultural University, Qingdao 266109, China;
2. Agricultural Bureau of Shouguang,National Shouguang Comprehensive Test Station for Bulk Vegetable System,
Weifang 262700, China; 3. Weifang Vocational College, Weifang 262700, China
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| Abstract: |
| 【Objective】In order to clarify the influence of automatic irrigation of soil moisture measurement on water use efficiency, explore and determine the optimal soil moisture management parameters of greenhouse tomato, and provide technical support for the green and healthy development of greenhouse agriculture.【Method】The effects of management parameters (60%~65%, 75%~80%, 60%~95% of field water capacity and flood irrigation treatment) on yield, quality and water and nitrogen use efficiency of greenhouse tomato were investigated through field experiment for three consecutive seasons, combined with real-time monitoring of soil moisture in situ and “smart+” technology.【Result】The intelligent irrigation based on soil moisture monitoring in situ controlled the soil surface water content within the set range. The irrigation times of 60%~65%, 75%~80% and 60%~90% treatments were 55, 87 and 10 times in a single season on average, realizing the precise management of a small number of times. Compared with flood irrigation treatment, the yield was increased by 2.6%~24.3%, the irrigation amount was 1 215~3 105 m3/hm2, decreased by 35.9%~78.4%, the water use efficiency was increased to 42.8~58.7 kg/m3, and the nitrogen use efficiency was increased to 26.3%~34.7%. The yield of 75%~80% treatment was significantly increased by 12.8%~18.3% compared with other treatments, the average yield of three seasons was 111 t/hm2, the irrigation amount of one season was 2 655 m3/hm2, the water saving was 51.4%, the water use efficiency was 42.78 kg/m3, and the apparent nitrogen loss was 67.1% compared with that of flood treatment.【Conclusion】Intelligent irrigation based on soil moisture monitoring in situ can not only improve the yield and quality of tomato, but also improve the efficiency of water and nitrogen use, reduce the risk of nitrogen leaching, reduce the apparent loss, and provide a basis for the optimization of irrigation parameters. |
| Key words: greenhouse tomato; soil moisture in situ monitoring; intelligent irrigation and fertilization; yield; water and nitrogen use efficiency |
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