The Combined Application of Urea and Fulvic Acid Solution Improved Maize Carbon and Nitrogen Metabolism

Gao, Feng; Li, Zeli; Du, Yiqin; Duan, Jianhang; Zhang, Tianjiao; Wei, Ziqi; Gong, Weili; Liu, Zhiguang; Zhang, Min

doi:10.3390/agronomy12061400

Cited by 11 publications

(16 citation statements)

References 62 publications

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“…The combined application of urea solution (4.0 g pot −1 ) and fulvic acid (5.4 g pot −1 ) tested by Gao et al [61] improved the maize yield and NUE values by 16.9% and 24.3%, respectively, in a two-year pot experiment. Under these conditions, the quoted authors also noted a rise in the NH 4 + content in soil by 12.1% and a positive influence of fulvic acid on the soil structure and availability of nutrients.…”

Section: Discussionmentioning

confidence: 98%

Use of Organic Materials to Limit the Potential Negative Effect of Nitrogen on Maize in Different Soils

2022

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This study was launched to test organic materials in the form of humic acids (HA) applied to soil to improve the effect of nitrogen on maize, and to determine an optimal dose of HA, which will be ecologically safe and will counteract potential negative (phytotoxic) influences of excessive nitrogen fertiliser doses, on two soils with different textural composition. The maize plants grown on the loamy sand were characterised by a higher value of the SPAD leaf greenness index, yields, and a lower content of total-N and sulphate sulphur in maize. Urea, and especially UAN, promoted higher SPAD leaf greenness index values during the stem elongation stage and particularly during the tassel emergence stage. The effect of urea on maize yields was positive on both soils, but UAN had a positive effect on this parameter only on the loamy sand. HA tended to increase the SPAD leaf greenness index. The impact of HA on plant height and yields (especially medium dose) was generally positive. However, a negative effect of the interaction of HA with UAN on the plant height and maize yield on the sand was observed. HA caused an increase in the total-N content, and their highest dose also decreased the sulphate sulphur content in maize. The application of HA to soil has a positive influence on the growth and development of plants and can create positive effects by mitigating adverse consequences of intensive agricultural production in the natural environment.

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Section: Discussionmentioning

confidence: 98%

Use of Organic Materials to Limit the Potential Negative Effect of Nitrogen on Maize in Different Soils

2022

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“…The application of humic‐like substances to maize seedlings has been shown to enhance nitrogen metabolism (Ertani et al, 2013). Furthermore, studies have demonstrated that the combined application of urea and FA solution significantly stimulated the activities of enzymes related to nitrogen metabolism in maize, leading to overall improved crop nitrogen use efficiency NUE (Gao et al, 2022; Li et al, 2022). Our research also supports these findings, showing that the application of FA significantly improves nitrogen uptake and enzyme activity involved in nitrogen metabolism under low nitrogen stress (Figure 2).…”

Section: Discussionmentioning

confidence: 99%

“…The application of humic-like substances to maize seedlings has been shown to enhance nitrogen metabolism (Ertani et al, 2013). Furthermore, studies have demonstrated that the combined application of urea and FA solution significantly stimulated the activities of enzymes related to nitrogen metabolism in maize, leading to overall improved crop nitrogen use efficiency NUE (Gao et al, 2022;Li et al, 2022).…”

Section: Improvement Of Fa On Maize's Nitrogen Metabolismmentioning

confidence: 99%

Fulvic acid alleviates the stress of low nitrogen on maize by promoting root development and nitrogen metabolism

Liang,

Wang,

Wang

et al. 2024

Physiologia Plantarum

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The potential of fulvic acid (FA) to improve plant growth has been acknowledged, but its effect on plant growth and nutrient uptake under nutrient stress remains unclear. This study investigated the effects of different FA application rates on maize growth and nitrogen utilization under low nitrogen stress. The results showed that under low nitrogen stress, FA significantly stimulated maize growth, particularly root development, biomass, and nitrogen content. The enhanced activity levels of key enzymes in nitrogen metabolism were observed, along with differential gene expression in maize, which enriched nitrogen metabolism, amino acid metabolism and plant hormone metabolism. The application of FA regulated the hormones' level, reduced abscisic acid content in leaves and Me‐JA content in roots, and increased auxin and zeatin ribose content in leaves. This study concludes that, by promoting root development, nitrogen metabolism, and hormone metabolism, an appropriate concentration of FA can enhance plant tolerance to low nitrogen conditions and improve nitrogen use efficiency.

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“…Carbohydrates facilitate the assimilation and transport of mineral elements and are the main source of energy in plants [39,40]. Nitrogenous metabolites (proteins, amino acids, and GSH), being a source of nitrogen and hormonal precursors, positively modify metabolism, which improves the growth and accumulation of biomass in plants [41][42][43].…”

Section: Seedling Biomass and Growth Parametersmentioning

confidence: 99%

The Biostimulant Effect of Hydroalcoholic Extracts of Sargassum spp. in Tomato Seedlings under Salt Stress

Sariñana-Aldaco

Benavides-Mendoza

Robledo‐Olivo

et al. 2022

Plants

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Currently, the use of biostimulants in agriculture is a tool for mitigating certain environmental stresses. Brown algae extracts have become one of the most important categories of biostimulants in agriculture, and are derived from the different uses and positive results obtained under optimal and stressful conditions. This study aimed to examine the efficacy of a foliar application of a hydroalcoholic extract of Sargassum spp. and two controls (a commercial product based on Ascophyllum nodosum and distilled water) with regard to growth, the antioxidant system, and the expression of defense genes in tomato seedlings grown in nonsaline (0 mM NaCl) and saline (100 mM NaCl) conditions. In general, the results show that the Sargassum extract increased the growth of the seedlings at the end of the experiment (7.80%) compared to the control; however, under saline conditions, it did not modify the growth. The Sargassum extract increased the diameter of the stem at the end of the experiment in unstressed conditions by 14.85% compared to its control and in stressful conditions by 16.04% compared to its control. Regarding the accumulation of total fresh biomass under unstressed conditions, the Sargassum extract increased it by 19.25% compared to its control, and the accumulation of total dry biomass increased it by 18.11% compared to its control. Under saline conditions, the total of fresh and dry biomass did not change. Enzymatic and nonenzymatic antioxidants increased with NaCl stress and the application of algal products (Sargassum and A. nodosum), which was positively related to the expression of the defense genes evaluated. Our results indicate that the use of the hydroalcoholic extract of Sargassum spp. modulated different physiological, metabolic, and molecular processes in tomato seedlings, with possible synergistic effects that increased tolerance to salinity.

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The Combined Application of Urea and Fulvic Acid Solution Improved Maize Carbon and Nitrogen Metabolism

Cited by 11 publications

References 62 publications

Use of Organic Materials to Limit the Potential Negative Effect of Nitrogen on Maize in Different Soils

Use of Organic Materials to Limit the Potential Negative Effect of Nitrogen on Maize in Different Soils

Fulvic acid alleviates the stress of low nitrogen on maize by promoting root development and nitrogen metabolism

The Biostimulant Effect of Hydroalcoholic Extracts of Sargassum spp. in Tomato Seedlings under Salt Stress

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