Comprehensive study on tobacco agroecosystem in long-term stationary fertilizer experiment

Teodora Dekalska, Tsveta Hristeva, Radka Bozhinova Tanya Vaneva Yonko Yonchev

Abstract: The effect of different rates and forms of mineral fertilization on tobacco agroecosystem was studied in long-term stationary experiment. Urea, triple superphosphate and potassium sulfate were used as sources of nitrogen, phosphorus and potassium respectively. The aim of the investigation was to obtain comprehensive characterization of the tobacco agroecosystem, established in the particular conditions. The changes in soil properties (agrochemical and biological), mineral nutrition of tobacco, the yield and quality, productivity, weed community composition and density, and also pest and viral diseases infestation were estimated. Negative changes in the soil properties were detected. Variations in the mineral composition, tobacco yield and quality, depending of the treatments were observed. The different forms and rates of mineral fertilizers, and also tobacco continuous growing system, tend to benefit certain weed species. There were no significant differences between conventional and continuous growing systems in the rates of pest and viral diseases infestations.

Keywords: long-term fertilization; soil properties; tobacco agroecosystem

Date published: 2017-07-12