Arid Zone Research ›› 2023, Vol. 40 ›› Issue (11): 1855-1864.doi: 10.13866/j.azr.2023.11.15

• Agricultural Ecology • Previous Articles     Next Articles

Effects of magnetic and nitrogen coupling on the yield and water and fertilizer usage efficiency of processed tomatoes under mulched drip irrigation

MA Yifan1,2,3(),LYU Desheng1,2,3(),WANG Zhenghua1,2,3,LI Yanqiang1,2,3,LIU Jian1,2,3,WEN Yue1,2,3,ZHU Yan1,2,3   

  1. 1. College of Water Conservancy & Architectural Engineering, Shihezi University, Shihezi 832000, Xinjiang, China
    2. Key Laboratory of Modern Water-Saving Irrigation of Xinjiang Production & Construction Group, Shihezi 832000, Xinjiang, China
    3. Key Laboratory of Northwest Oasis Water-Saving Agriculture, Ministry of Agriculture and Rural Affairs, PR China, Shihezi 832000, Xinjiang, China
  • Received:2023-05-25 Revised:2023-08-20 Online:2023-11-15 Published:2023-12-01

Abstract:

This study used yield and water and fertilizer usage efficiency as targets to explore a magnetized water fertilization system suitable for tomato processing via drip irrigation under film. Four magnetized water samples with an intensity of 0 Gs (M0), 2000 Gs (M1), 3000 Gs (M2), and 4000 Gs (M3) as well as three nitrogen application levels of 200 kg N·hm-2 (N1), 250 kg N·hm-2 (N2), and 300 kg N·hm-2 (N3) were set up, and a split zone test design was adopted. Field experiments were conducted. By monitoring the soil moisture content, plant height, stem diameter, and above-ground biomass during the growth period of processed tomatoes, combined with the final yield index, the effects of magnetic nitrogen combination on the water and fertilizer usage efficiency of processed tomatoes were explored. The results showed that magnetized water drip irrigation significantly increased soil moisture content and soil water storage. Magnetic nitrogen coupling was also shown to significantly increase the soil moisture content in the 20-40 cm soil layer. When the magnetized water intensity was 2270-3678 Gs and the nitrogen rate was 220-230 kg·hm-2, the growth of processed tomatoes was promoted. However, when the magnetization intensity was greater than 4000 Gs and the nitrogen rate was more than 250 kg·hm-2, the growth of processed tomatoes could not be further improved. As magnetization was increased, the yield and water and fertilizer use efficiency of processed tomatoes increased before decreasing. As the nitrogen application rate was increased, the yield and water use efficiency increased, but the partial productivity of nitrogen fertilizer decreased. Among them, the M2N3 treatment had the highest yield and water use efficiency (169.67 t·hm-2 and 35.61 kg·m-3), while the M2N1 treatment had the highest nitrogen partial productivity (822.54 kg·kg-1). Using regression and spatial analyses, the magnetic nitrogen range of yield, water use efficiency, and nitrogen partial productivity was 2270-3678 Gs and 220-230 kg N·hm-2. This study can provide theoretical support for the scientific application of magnetized water and nitrogen fertilizer in tomato processing in Xinjiang and provide scientific guidance for optimizing the magnetic nitrogen combination configuration to improve the yield of tomato processing.

Key words: mulched drip irrigation, magnetic and nitrogen coupling, yield, water and fertilizer utilization efficiency, spatial analysis, processing tomatoes