数字农科院2.0

Integrating water and nitrogen optimization to enhance wheat yield and macronutrients absorption under high-low seedbed cultivation

文献类型： 外文期刊

作者： Shuang Li;Huijie Li;Jiahong Yang;Zhuanyun Si;Tao Zhou;Ruiqi Ren;Hongchen Li;Peng Li;Yanfang Liu;Junming Liu;Bingcheng Si;Yang Gao;Angela Lausch

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期刊名称： Irrigation Science

ISSN： 0342-7188

年卷期： 2026 年 44 卷 2 期

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收录情况： SCIE（2025版） ; ; EI（2025版）

摘要： High-low seedbed cultivation (HLSC) has been increasingly adopted in winter wheat production for its potential to enhance grain yield. However, suboptimal water-nitrogen inputs may disrupt the balance between yield and grain nutrient content. This study investigates the temporal dynamics of macronutrient (N, P, and K) uptake and accumulation in response to different water and nitrogen management strategies. A three-season field experiment (2020–2023) was conducted in HLSC-cultivated wheat, involving four nitrogen application rates (360, 300, 240, and 180 kg ha− 1, referred to as N1, N2, N3, and N4) and three irrigation levels (120, 90, and 60, referred to W1, W2, and W3). Results indicated that various water-nitrogen strategies significantly influenced grain N, P and K content and total uptake. Grain nutrient content initially increased and then declined with increasing nitrogen rates, peaking for N2 and N3. In contrast, irrigation had no significant effect on nutrient concentrations. Grain yield was positively correlated with grain N content and total NPK uptake. Both nitrogen and irrigation rates notably affected yield, total NPK uptake and the N:P stoichiometric ratio. Although the N1W1 treatment achieved highest grain yield, it resulted in 7.3% lower grain N uptake, 20.8% lower P uptake, 13.1% lower K uptake and 21.4% lower nitrogen agronomic efficiency, respectively, compared to N2W2. A TOPSIS analysis identified irrigation levels of 90–120 mm combined with N rates of 240–300 kg ha⁻¹ as the optimal strategy for achieving high yield and nutrient efficiency. These findings provide a scientific basis for optimizing water-nitrogen management in HLSC-cultivated wheat under climatic conditions comparable to those of the North China Plain.

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