Plant Soil Environ., 2023, 69(4):141-151 | DOI: 10.17221/391/2022-PSE
The varying promotion effects of fulvic acid with different molecular weights on the enhancement of grain yield and quality of winter wheatOriginal Paper
- 1 College of Resources and Environment, Henan Agricultural University, Zhengzhou, P.R. China
- 2 State Key Laboratory of Wheat and Maize Crop Science, Henan Agricultural University, Zhengzhou, P.R. China
- 3 Key Innovation Center for the Integration of Industry and Education on Comprehensive Utilization of Agricultural Wastes and Prevention and Control of Agricultural Non-point Pollution of Jiangxi Province, Jiangxi Agricultural University, Nanchang, P.R. China
This study aims to verify the application effect of Fluvic acid (FA) with different molecular weights (MW) on the growth and quality of winter wheat. FA extracted from lignite was divided into 3 MWs (W1≤3000 D, 3000 D<W2≤10000 D, and W3>10000 D) by dialysis, and its structure was analyzed. Three application rates were set for each MW FA in the pot experiment, which were 10, 25 and 50 mg/kg in soil, respectively, and water was the control. There were significant interactive effects of MW and application rates of FAs. Compared with the control, all the FA treatments significantly increased grain yields, nitrogen uptake efficiencies, grain iron concentration, and soil available nitrogen concentration. Heatmap analysis revealed that the W1C2 (10 mg/kg W1) treatment had the most significant impacts for all analyzed indexes, whereas W3C3 (50 mg/kg W3) showed the weakest impacts. The results showed that at a low application rate (10 mg/kg in soil), the promotion effects of the three MW FAs were similar. W1 showed the most significant promotion effects, which was attributed to the combined effects of its lower MW and functional group characteristics.
Keywords: biostimulant; functional groups; iron concentration; soil nutrient concentration; nitrogen translocation
Received: March 11, 2022; Accepted: March 24, 2023; Prepublished online: April 12, 2023; Published: April 25, 2023 Show citation
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