Effect of water and nitrogen application under mulched drip irrigation on growth, yield and quality of spring soybean

• Published in: Guanʻgai paishui xuebao Vol. 44; no. 2; pp. 37 - 46
• Main Authors: WANG Yue, HE Xianggui, XIE Haixia, ZHOU Jianpin, WANG Shuyu
• Format: Journal Article
• Language: Chinese
• Published: Science Press 01.02.2025
• Subjects: spring soybean; drip irrigation under film; water and nitrogen application rates; production; quality
• ISSN: 1672-3317
• DOI: 10.13522/j.cnki.ggps.2024148

【Background and Objective】In 2023, Xinjiang initiated a project to cultivate 66 700 hectares of spring soybeans. Due to its arid and semi-arid climate, soybean production in Xinjiang depends heavily on irrigation and fertilization. Understanding the combined effects of water and nitrogen under mulched subsurface drip irrigation is critical for optimizing the use efficiency of these inputs and providing technical guidance for soybean production.【Method】A field experiment was conducted using the soybean variety Yongnong 3 in a split-plot design. The experiment included three irrigation amounts: 3 600 m3/hm2 (W1), 4 500 m3/hm2 (W2), and 5 400 m3/hm2 (W3). Each irrigation treatment was paired with four nitrogen applications: no nitrogen (N0), 138 kg/hm2 (N1), 207 kg/hm2 (N2), and 276 kg/hm2 (N3). During the experiment, we measured and analyzed crop growth, yield and grain quality.【Result】① Increasing irrigation amount significantly promoted crop growth. Dry matter accumulation over time followed a logistic growth