Study of the agrobiodiversity of the Lotus corniculatus L. grassland under mountain conditions after the application of organic fertilizers
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Date
2025-06-23
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Plovdiv University Press "Paisii Hilendarski"
Abstract
In a research experiment, carried out in 2020-2023 in the Research Institute of Mountain Stockbreeding and Agriculture-Troyan, on the grassland of Lotus corniculatus L., variety "Targovishte 1", the influence of fertilization with the organic fertilizers Blago 5 in doses of 300 and 600 ml/da (varieties 2 and 3) and Fertileader Axis in doses of 500 and 1000 ml/da (varieties 4 and 5) was tested in comparison with an unfertilized control (variety 1). Biodiversity of the untreated crop and agrobiodiversity by botanical groups and weed species composition were studied. The ecological effect of organic fertilization and its impact on the floristic composition of the grassland were determined. The percentage and species contribution of the main botanical groups (grasses, legumes, motley grasses) in the Lotus corniculatus L. grassland changed positively under the influence of fertilization, and the group of motley grasses including plants from different botanical families. There was an increased presence of the shade grass species Lotus corniculatus L. and a reduced number and percentage of representatives of motley grasses in the formed above-ground mass after treatment with the two biofertilizers. Fertileader Axis biofertilizer at a dose of 1000 ml/da proved to be the most effective, stimulating the development of Lotus corniculatus L. in the stand by 82.6% and reducing the number of weedy species (13.6%). The resulting higher relative proportion of Lotus corniculatus L. suggests better quality indicators of grass biomass. The results obtained define the applied biofertilizers as an effective agrotechnical practice, leading to an increase in the presence of economically important grass species and a decrease in the proportion of low-productive variable grasses.
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Lotus corniculatus L., biodiversity, fertilization, agrobiodiversity, botanical composition