Responses of grain yield and water-nitrogen dynamic of drip-irrigated winter wheat (Triticum aestivum L.) to different nitrogen fertigation and water regimes in the North China Plain

• DOI: 10.1016/j.agwat.2023.108494
• Publication Date: 2023-08-28T22:34:20Z
• Authors: Abdoul Kader Moun...; Sunusi Amin Abubakar; Zhuanyun Si; Rakhwe Kama; Yang Gao; Aiwang Duan
• Keywords: Fertigation; Water Use Efficiency; Anthesis; Surface irrigation

The North China Plain (NCP) has progressively implemented drip irrigation for winter wheat (Triticum aestivum L.) production because of its substantial water saving and improved nitrogen (N) use efficiency. Nevertheless, the ideal water-N utilization regime drip-irrigated remains ambiguous. Two years field experiments were carried out to assess influences different N fertigation regimes on grain yield (GY), evapotranspiration (ETc), productivity, optimization procedure (TOPSIS). two quotas I45 (Irrigation when ETc reaches 45 mm) I30 30 mm). six-N application modes N0–100 (100 % from jointing booting), N25–75 (25 at sowing 75 N50–50 (50 50 N75–25 (75 25 N100–0 sowing), SRF100 (240 kg ha−1, 43 sowing). Results demonstrated that optimizing positively influenced GY, ETc, productivity. maximum GY 9.72 9.94 (t ha−1) was achieved in I45N50–50, which had 376.67 378.67 (mm), 2020–2021 2021–2022, respectively. TOPIS designated I45N50–50 as best treatment (ranked 1st) based high minimized ETc. Based average, also resulted highest efficiency (2.61 m−3), (3.74 partial factor productivity (40.99 kg−1). Considering comprehensively combination split basal topdressing mm quota an optional choice under system. These findings could serve a scientific foundation management NCP.