The Application of Humic Acid Urea Improves Nitrogen Use Efficiency and Crop Yield by Reducing the Nitrogen Loss Compared with Urea

Kong, Baishu; Wu, Qi; Li, Yongqiang; Zhu, Taochuan; Ming, Yufei; Li, Chuanfu; Li, Chuanrong; Wang, Fenghua; Jiao, Shuying; Shi, Lianhui; Zhi, Dong

doi:10.3390/agriculture12121996

Cited by 9 publications

(13 citation statements)

References 51 publications

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“…N is indispensable for the development of modern agriculture in China, and many studies have been performed to explore the positive effects induced by FA application on plant NUE. Similar to the results obtained by Kong et al [12] in which humic acid (HA) application reduced N loss, authors such as Gao et al [9] also reported that FA application could efficiently reduce ammonia volatilization from urea by inhibiting urease activity, and the formation of stable FA urea complexes under the combined application of FA and urea could also delay urea decomposition. Due to regulations, the goal of N preservation and N loss reduction has been achieved, which not only minimizes adverse environmental effects but is also beneficial in improving plant NUE.…”

Section: Introductionsupporting

confidence: 69%

Effects of Fulvic Acid on Growth and Nitrogen Utilization Efficiency in M9T337 Seedlings

Yu,

Wang,

Cui

et al. 2023

Plants

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Both fulvic acid (FA) and nitrogen (N) play important roles in agricultural production in China. Plants typically show a higher nitrogen utilization efficiency (NUE) under FA application. However, the role of FA application in apple growth and NUE remains unclear. A hydroponic culture experiment was performed, and M9T337 seedlings (a dwarf apple rootstock) were used as the experimental subjects. The biomass, photosynthesis, accumulation, and distribution of photosynthates, N absorption and assimilation, and relative gene expression in the seedlings were examined after treatment with five different concentrations of FA (0, 60, 120, 180, and 240 mg·L−1, represented by CK, FA1, FA2, FA3, FA4, respectively). The results showed that the seedling dry weight and 15NUE were enhanced by FA, and both were highest under the FA2 (the concentration of fulvic acid is 120 mg·L−1) treatment. Further analysis revealed that under the FA2 treatment, the root morphology was optimized, and the root activity was relatively high. Compared with CK (control, the concentration of fulvic acid is 0 mg·L−1), the FA2 treatment strengthened photosynthesis, elevated the key enzyme activities related to C metabolism, upregulated the gene expression of sugar transport proteins, and increased the root sorbitol and sucrose contents, which suggested that the FA2 treatment optimally affected the root growth and N absorption because it enhanced photosynthate synthesis and the leaf-to-root translocation of photoassimilates. The seedlings in the FA2 treatment group also showed a significantly higher NO3− influx rate and NRT (nitrate transporter) gene expression in the roots. Moreover, relatively high N metabolism-related enzyme activities in the leaves and roots were also observed under the FA2 treatment. The isotope labeling results showed that the optimal FA2 supply not only promoted seedling 15N absorption but also optimized the distribution of C and N in the seedlings. These results suggested that an optimal FA supply (120 mg·L−1) enhanced seedling NUE by strengthening photoassimilate synthesis and transport from leaves to roots, regulating N absorption, assimilation, and distribution.

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Section: Introductionsupporting

confidence: 69%

Effects of Fulvic Acid on Growth and Nitrogen Utilization Efficiency in M9T337 Seedlings

Yu,

Wang,

Cui

et al. 2023

Plants

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“…The higher total soil N availability in rhizosphere found in humalite treated plants could be due to reduced N losses from leaching or N 2 O emissions as HPs are known to reduce N losses. Kong et al (2022) found that the application of HAtreated urea reduced the N losses from leaching and N 2 O emissions by 25.5% and 23%, respectively, in laboratory experiments performed using field soil. The authors found that HA-treated urea increased the NUE of maize and wheat by 35.3% and 77.5% and yield by 14.2% and 15.5%, respectively.…”

Section: Discussionmentioning

confidence: 94%

“…Kong et al. (2022) found that the application of HA‐treated urea reduced the N losses from leaching and N 2 O emissions by 25.5% and 23%, respectively, in laboratory experiments performed using field soil. The authors found that HA‐treated urea increased the NUE of maize and wheat by 35.3% and 77.5% and yield by 14.2% and 15.5%, respectively.…”

Section: Discussionmentioning

confidence: 99%

Humalite enhances the growth, grain yield, and protein content of wheat by improving soil nitrogen availability and nutrient uptake

Rathor,

Rouleau,

Gorim

et al. 2024

J. Plant Nutr. Soil Sci.

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BackgroundThe application of synthetic chemical inputs in current agricultural practices has significantly increased crop production, but their use has caused severe negative consequences on the environment. Humalite is an organic soil amendment that is rich in humic acid and found in large deposits in southern Alberta, Canada. Humic products can enhance nutrient uptake and assimilation in plants by reducing nutrient losses and enhancing bioavailability in the soil.AimHere, we evaluated the effects of different humalite rates in the presence of nitrogen, phosphorus, potassium (NPK) at recommended rates on soil nitrogen availability, wheat growth, grain yield, seed nutritional quality, and nitrogen use efficiency (NUE) under controlled environmental conditions.MethodsA series of studies were conducted by applying five different rates of humalite (0, 200, 400, 800, and 1600 kg ha−1) with NPK at recommended rates. Soil nitrogen availability and shoot and root growth parameters were recorded at flowering stage. NUE was calculated based on the grain yield at maturity stage.ResultsPlants grown in the presence of humalite augmented root morphological parameters (root length, volume, and surface area), plant biomass (shoot and root), and nutrient uptake (N, P, K, and S) compared to the plants supplied with recommended fertilizer alone. Furthermore, humalite application significantly increased grain yield (14%–19%), seed protein content (23%–30%), and NUE (14%–60%) compared to the fertilizer application alone.ConclusionThese findings suggest that humalite can be used as an organic soil amendment to reduce synthetic fertilizer application and improve plant growth and yield while enhancing fertilizer use efficiency.

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“…However, treatment from humic acid with micronutrients gave higher results. Humic acid will reduce N losses in soil by around 23-25% from leaching, NH3 volatilization, and N2O emission (Kong et al, 2022). The available P in control was zero but its level significantly increased with both humic acid treatments.…”

Section: Chemical Characteristics Of Soilmentioning

confidence: 97%

Application of humic acid supplemented with micronutrient increase rice production

Siregar,

Soekarno Mismana Putra,

Muhammad Abdul Aziz

et al. 2023

J. Agron. Indonesia (Indonesian J. Agron.)

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Fertilizer is one of the crucial inputs to maximize nutrients needed by plants, especially rice. However, insufficient ameliorant application may affect the fertilizers' effectiveness. Humic acid is believed as one of the ameliorants to improve soil conditions resulting in higher nutrient availability. The study aimed to evaluate the effect of combining humic acid and micronutrients on growth, production, and nutrient contents in rice. Three treatments were applied, i.e., control (without humic acid), humic acid, and humic acid + micronutrients. The result showed that both humic acid treatments produced the highest number of tillers, humic acid application solely stimulated the highest root length, and humic acid + micronutrients stimulated the highest plant height, and fresh and dry biomass weight. Grain weight was not affected by treatments, but humic acid + micronutrients gave a higher weight of milled grain and number of filled grains. Humic acid application solely resulted in plant biomass and grains having higher N, P, and K contents. Overall, the application of humic acid + micronutrients is recommended to increase rice production. Keywords: ameliorant; fertilizer; nutrient availability; nutrient uptake

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The Application of Humic Acid Urea Improves Nitrogen Use Efficiency and Crop Yield by Reducing the Nitrogen Loss Compared with Urea

Cited by 9 publications

References 51 publications

Effects of Fulvic Acid on Growth and Nitrogen Utilization Efficiency in M9T337 Seedlings

Effects of Fulvic Acid on Growth and Nitrogen Utilization Efficiency in M9T337 Seedlings

Humalite enhances the growth, grain yield, and protein content of wheat by improving soil nitrogen availability and nutrient uptake

Application of humic acid supplemented with micronutrient increase rice production

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