Optimizing Planting Densities, Irrigation and Nitrogen Topdressing to Improve Bioavailable Soil Water and Yield and Quality of Winter Wheat

• Published in: Guanʻgai paishui xuebao Vol. 40; no. 9; pp. 48 - 56
• Main Authors: WANG Xiaosen, LYU Mouchao, WANG Sen, CAI Jiumao, LI Ying, QIN Jingtao, LIU Jieyun, FAN Xichao, WANG Hezhou
• Format: Journal Article
• Language: Chinese
• Published: Science Press 01.09.2021
• Subjects: grain quality; irrigation scheduling; planting density; topdressing nitrogen; winter wheat; yield
• ISSN: 1672-3317
• DOI: 10.13522/j.cnki.ggps.2020353

【Objective】 Water and fertilizer use efficiency of crops depends on many factors, and the objective of this paper is to investigate experimentally how to achieve this through optimizing planting density, irrigation and nitrogen topdressing. 【Method】 The experiment was conducted in lysimeters with winter wheat used as the model plant. It compared two planting densities: 5×106 plant/hm2 (D1) and 3×106 plant/hm2 (D2). For each planting density, there were three irrigation treatments: irrigating at the turning-green stage and the grain-filling stage (W1), irrigating at the turning-green stage, jointing stage and grain-filling stage (W2), irrigating at the turning-green stage, jointing stage, heading stage and grain-filling stage (W3), and two nitrogen topdressing treatments: topdressing all nitrogen at the turning-green stage, topdressing a half at the turning-green stage and the other half at the jointing stage. In each treatment, we measured the changes in soil water contents. 【Result】 Irrigating scheduling W2