| To investigate the effects of chelated titanium on dry matter accumulation and yield formation in late-sown winter wheat in Xinjiang, and to identify the optimal timing and concentration for foliar application of chelated titanium, thereby providing theoretical references for enhancing yields in late-sown winter wheat. Using the locally cultivated winter wheat variety Xin Dong 18 from the T"a"erpen Basin as material, field trials were conducted over two consecutive years at the demonstration base of the Tacheng Regional Agricultural Science Research Institute. A two-factor split-plot experimental design was employed, with the main plots set for the timing of foliar application of organic chelated titanium: booting stage (D1), flowering stage (D2). Subplots included application concentrations of 376 μmol/L (C1), 501 μmol/L (C2), 626 μmol/L (C3), and water control (C0), with three replicates. Wheat agronomic traits, dry matter, grain filling progress, yield, and yield components were measured. Results indicated that foliar application of chelated titanium enhanced dry matter accumulation in late-sown winter wheat. Compared to the concurrent control, the D1 treatment showed increases of 25.57% and 14.20%, while the D2 treatment increased by 20.99% and 15.35%. Among these, the D1C2 treatment yielded the most favorable effects on late-sown winter wheat, significantly increasing the dry matter accumulation index and transport rate, accelerating grain filling rate and duration, markedly increasing the number of grains per spike, and improving thousand-grain weight. It achieved the highest yields of 8718.32 kg/hm2 and 7191.89 kg/hm2 in the same year, representing significant increases of 5.06% and 9.45% compared to C0. This provides theoretical reference for the practical application of chelated titanium in late-sown winter wheat production and offers agronomic solutions to enhance yield and economic benefits in this crop. |
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