Browsing by Author "Szuba-Trznadel, Anna"

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    The effect of broadcast struvite fertilization on element soil content and microbial activity changes in winter wheat cultivation in southwest Poland
    (Nature, 2025) Ramut, Rafał; Jama-Rodzeńska, Anna; Woźniak, Małgorzata; Siebielec, Sylwia; Kamińska, Joanna; Szuba-Trznadel, Anna; Gałka, Bernard
    This study aimed to evaluate the potential of struvite as a phosphorus fertilizer in winter wheat cultivation in southwest Poland. The field experiment was conducted at Wroclaw University of Environmental and Life Sciences in Swojec in 2022/2023. The studied factors were two cultivars of winter wheat (Activus and Chevignon) and two phosphorus fertilization methods (traditional superphosphate and struvite). Aditionally, the study attempted to develop a reasonable phosphorus testing method to analyze phosphorus content in soil. Three phosphorus extraction methods were used to determine P, Mg and K content where Mehlich 3 and Yanai seem to be most appropriate. The following traits in the study were estimated: grain yield, content of P, Mg and K in the grain, as well as soil microbial activity expressed as enzyme activity (acid and alkaline phosphatase, dehydrogenase), metabolic activity (Biolog EcoPlates™) and phosphate solubilizing bacteria (PSB) abundance. An increase in the Mg content of wheat grain under the influence of struvite application was found. Phosphorus content in the soil depended primarily on the date of soil sampling followed by fertilization method and varieties based on the Egner–Rhiem method as well as Mehlich 3. Soil enzymatic activity depended mainly on the sampling date and then on fertilization. In the case of PSB, the dominant factor was the wheat cultivars. Biolog EcoPlate analysis showed that the most metabolically active microbial communities were recorded in samples collected at the second time of sampling (end of winter wheat vegetation) To see how the phosphorus content develops after the application of struvite under field conditions as well as its fraction, a long-term experiment should be conducted.
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    The effect of various inoculants on the productivity, chemical composition of soybean seeds (Glycine max (L. Merrill) Magnolia PZO) and chemical properties of soil in southwest part of Poland – preliminary studies
    (Instytut Uprawy Nawożenia i Gleboznawstwa - Państwowy Instytut Badawczy w Puławach, 2024) Dłutowska, Karolina; Gałka, Bernard; Szuba-Trznadel, Anna; Ramut, Rafał; Włodarczyk, Marcin; Jama-Rodzeńska, Anna; Fialkiewicz, Wiesław
    The introduction of bacterial inoculations into soybean cultivation is becoming an essential agronomic practice. The procedure of inoculating soybean seeds with microorganisms capable of fixing atmospheric nitrogen is recommended in situations where there is a deficit in soil native strains of symbiotic bacteria or their number is limited. The nodule bacteria enter the soil with the inoculated seeds and develop on the roots of the plants. Through this process, plants can use atmospheric nitrogen directly from the air. In 2023, a one-factor field experiment in a randomized block design in three replications was conducted at the Variety Evaluation Experiment Station (SDOO) in Zybiszow, Lower Silesia that belongs to Research Centre for Cultivar Testing. One soybean cultivar, Magnolia PZO, and four different inoculants – Liquifix Glycine 120, Turbosoy, Rhizobium Soi and Bi Soya – were applicated in the study. The inoculants were applied to the seeds immediately before sowing. The aim of the study was to determine the effect of the applied inoculants on soil abundance of basic elements, selected plant biometric traits, yield and chemical composition of soybean seeds. The soil was analyzed before the establishment of the experiment and after its liquidation for pH values, phosphorus, potassium and magnesium content. The applied inoculations had a positive effect on yield and number and weight of nodules and soybean yield. The greatest yield was observed under using Liquifix Glycine 120 (6.90 t/ha), while the lowest under using Rhizobium Soi (5.19 t/ha) compared to control plots (5.59 t/ha). Similar relation was observed in a case of nodule weight and number with the greatest value under Liquifix Glycine 120 (2.97 g and 27.33 pcs) compared to control plots (0.12 g and 1.33 pcs). However, there was no effect on the chemical properties of the soil and the results of chemical analyses of the seeds. The research presented here is preliminary field experiments using bacterial inoculations in soybean cultivation. Their aim was to evaluate the potential of these inoculants in increasing yields and improving biometric traits, which can contribute to sustainable agricultural development by reducing the need for mineral fertilizers. The results of this study may provide a basis for further work on biological methods of promoting plant growth, which is particularly important in the context of the growing need to reduce the environmental impact of agriculture.