Effect of Humic Fertilizers and Growth Bioregulators on the Chemical Composition of Cucumber Hybrid F1 Orzu under the Conditions of Southern Kyrgyzstan
Jul 2026· Bulletin of Science and Practice· Vol 12, pp. 264-271· 0 citations
Abstract
This paper presents the results of long-term studies (2021-2023) on the effect of humic fertilizers and plant growth bioregulators on the chemical composition of fruits and the above-ground part of cucumber plants (Cucumis sativus, hybrid F1 Orzu). The content of nitrogen, phosphorus, and potassium was analyzed. It was found that the nitrogen content in cucumber fruits varied depending on the year, but treatment with humic fertilizers and biostimulants led to an increase in nitrogen content by 0.09–0.18% compared to the control. The concentration of phosphorus in fruits also varied annually, while the potassium content remained relatively stable and did not depend on the application of fertilizers. In the above-ground part of the plants, differences in nitrogen content were observed depending on the preparation used and the stage of development. Foliar feeding with humic fertilizers during the flowering and fruiting phases contributed to an increase in the level of nitrogen in plant tissues by 0.08–0.15% compared to the control. The phosphorus content in the above-ground part of the plants was relatively stable over the three years. The use of humic fertilizer "Cytogumat" and other treatment options led to an increase in the potassium content in the above-ground part of the plants by 0.24–0.30%, which indicates an improvement in potassium transport and assimilation.
The results of a three-year study examining the effects of humic fertilizers and biostimulants on the dry matter content of the fruits and aerial parts of tomatoes (Volgogradsky variety) and cucumbers (F1 hybrid Orzu) are presented. It was found that the use of humic fertilizers and biostimulants, especially in combination (Edagum SM + Gumostim), resulted in increased dry matter content in both the fruits and aerial parts of both crops compared to the control treatments. Variability in dry matter content was noted across the years of the study, related to weather conditions and plant adaptation.
N. Tanakov, Z. Karimova· Bulletin of Science and Prac...· 0 citations
Viticulture, which holds a significant place in both the world and our country's agriculture, plays a major role in improving productivity and quality, which also carries great economic value. Fertilization and ensuring that vineyards are nourished to a level that will yield maximum produce are among the foremost practices in this regard. Chemical fertilizers are used intensively in traditional production management, both on the soil and on the leaves. These practices cause pollution of the soil, air, and water resources. This study aims to investigate the effect of foliar application of a humic substance obtained from natural resources. The research was conducted in three replications according to a randomized block design. The humic substance was applied at doses of 0, 0.1%, 0.2%, and 0.3%. According to the results obtained, the effect of foliar application of the humic substance on fresh fruit yield, total soluble solids (TSS), maturity index, and leaf content of K, Ca, Mg, Fe, Zn, Mn, Cu, and B, except for N and P, was found to be statistically significant. By evaluating the effects of all applications, it was concluded that the 0.2% dose yielded the best results, and could be recommended under the conditions of the Aegean Region, Manisa Province, and Alaşehir District.
H. Yener, Şenay Aydın· Soma Meslek Yüksekokulu Tekn...· 0 citations
Abstract The soil used is sandy in texture, low in nutrients, and low in organic matter, and therefore has low cation exchange capacity. Therefore, the objective was to evaluate the effectiveness of improving their physicochemical and biological properties by inoculating the roots with a solution of Methylobacterium and liquid compost in cauliflower cultivation, as well as integrating a treatment through an automated drip irrigation system. This biostimulant, biofertilizer, and biocontrol agent solution was used, which has applications in agriculture to improve soil health and crop productivity. The experiment was set up under a completely randomized block design with four treatments (T0, T1, T2, and T3), corresponding to doses of 0, 250, 333, and 400 mL per 200 L of water, respectively. The results indicated that treatment T3 significantly optimized the plant's physiological response to salt stress, increasing both its antioxidant capacity and chlorophyll α concentration. Likewise, physical characterization revealed significant differences in the morphological parameters of cauliflower, suggesting greater metabolic resistance and improved nutritional quality. Finally, ultrastructural analysis of the epidermis and stomata using microscopy showed that, while the control treatment (T0) had a collapsed surface, treatment T3 showed a functional and turgid ultrastructure. This demonstrates that the inoculation applied mitigates the phytotoxic impact of the substrate and optimizes the metabolic potential of the crop.
J. A. Legua Cárdenas, E. Macavilca Ticlayauri, M. S. Sánchez Calle et al.· Brazilian Journal of Biology· 0 citations
This study aims to determine the effect of liquid organic fertilizer (LOF) made from gamal leaves (Gliricidia sepium) on the growth of bird’s eye chili (Capsicum frutescens L.) as an alternative to natural urea fertilizer. The research is based on the high demand for fertilizers in chili cultivation and the negative impacts of excessive chemical fertilizer use on soil and the environment. Gamal leaves contain essential nutrients such as nitrogen (N), phosphorus (P), and potassium (K), which support plant growth. The experiment used various concentrations of gamal leaf LOF applied to chili plants, with observations on plant height, leaf number, and other morphological traits. Results showed that gamal leaf LOF positively affected plant growth, with certain concentrations performing better than the control. This indicates that gamal leaf LOF can serve as an eco-friendly and sustainable alternative to natural urea fertilizer.
A. F. Pulungan, Grandy Sihotang, Immanuel Veron Silitonga et al.· Indonesian Journal of Chemic...· 0 citations
The study was conducted to evaluate the impact of microelement fertilizers on the symbiotic activity and productivity of soybeans in the Central Black Earth Region. The work was conducted from 2023 to 2025 in the Kursk Region on the Osmon soybean variety. The effectiveness of liquid organomineral complexes of the Urozhainaya Liniya brand (Extra Mo, Extra B, Extra Cu, Extra B/Mo, Micro Complex) was studied. The experimental design included pre-sowing seed treatment and two foliar applications at the 3[rd] and 6[th] trifoliate leaf stages. The field test was conducted on typical deep, heavy loamy chernozem with a humus content of 5.5%. The use of microfertilizers optimised the legume-rhizobium symbiosis, stimulating the growth of the number and weight of nitrogen-fixing nodules relative to the control by 4.5-7.4 pcs/plant and 0.54-0.78 g/plant, respectively. The highest yield in the experiment was recorded in the Extra B/Mo variants 2.74 t/ha (+0.39 t/ha compared to the control) and Micro Complex 2.71 t/ha (+0.36 t/ha), the lowest Extra Cu 2.61 t/ha (+0.22 t/ha). In the dry year of 2024, the value of this indicator in the Extra B/Mo and Micro Complex variants remained at the level of 2.47-2.54 t/ha (control 2.27 t/ha). Protein yield per hectare reached 0.96 t/ha (Extra B/Mo) and 0.95 t/ha (Micro Complex) versus 0.80 t/ha in the control; oil yield was 0.63 t/ha and 0.61 t/ha, respectively (control 0.53 t/ha). The highest profitability was achieved with Extra B/Mo 146.8% (+24.7% compared to the control), Micro Complex 143.5% (+21.4%), Extra Mo 143.3 % (+21.2%), and Extra B 140.8 % (+18.7%); the lowest was achieved with Extra Cu 134.5% (+12.4%).
Zh. N. Minchenko, V. Lazarev· Achievements of Science and...· 0 citations
Sapindus delavayi (Franch.) Radlk. is a non-wood tree species of considerable ornamental, ecological, and medicinal value, and its fruits are rich in saponins, with notable cleansing and skin-care properties. However, this tree species is currently facing the dilemma of low fruit yield and unstable fruiting. Fertilization is an effective measure to improve this cultivation situation. Considering the harm of nitrogen fertilizer in soil, we designed four schemes to replace nitrogen fertilizer with organic fertilizers in this study, aiming to obtain the optimal fertilization combination for the growth of Sapindus delavayi (Franch.) Radlk. Three-year-old seedlings were subjected to applications of nitrogen fertilizer, organic fertilizer, and their combinations to evaluate their effects on plant physiological responses and soil physicochemical properties. Results revealed that the sole application of organic fertilizer significantly promoted the elongation of new shoots. Compared with the unfertilized control, the combined treatment of 30% organic fertilizer and 70% nitrogen fertilizer significantly increased soil nitrate nitrogen content by 161.54%, while ammonium nitrogen content decreased by 24.30%. Principal component analysis indicated that glutamine synthase (GS), glutamate synthase (GOGAT), and nitrate reductase (NR) were the major enzymes influencing leaf physiological responses. Therefore, we concluded that fertilization has affected the rate of nitrogen assimilation and altered the process of amino acid synthesis, thereby influencing the metabolism and maintenance of cellular function in Sapindus delavayi (Franch.) Radlk. Structural equation modeling further indicated that fertilization primarily influenced total carbon content in plant leaves by affecting soil organic matter and alkali-hydrolyzable nitrogen. These findings elucidate the regulatory relationship between plant physiological processes and soil properties under co-application of nitrogen and organic fertilizer, providing a scientific reference for field fertilization management of this tree species.
Fang-Yun Guo, Yi Luo, Yu Chen et al.· Plants· 0 citations
