Analyzing the Influence of Diatomite and Mineral Fertilizers on the Features of Cadmium-Contaminated Urban Lawns

Abstract

Contamination with heavy metals is among key anthropogenic pressures, experienced by urban lawns. It results in depletion of their environmental quality and functions. Implementation of fertilizers, containing silicon, is a promising approach to increase urban lawns’ sustainability to heavy metals’ pollution. Based on the field experiment, an influence of cadmium contamination on the chemical features and biomass quality of modeled urban green lawn ecosystems was studied. We demonstrated an increase of cadmium consumption by biomass on the second year of observations as the result of diatomite implementation together with mineral fertilizers. Both total sugar and disaccharides’ content in biomass was 15-20% higher for the contaminated plots where diatomite was implemented together with mineral fertilizers, compared to the uncontaminated control. This evidences a positive effect of the implemented reclaiming on stress tolerance of the green lawns.

Keywords

• тяжелые металлы
• кадмий
• загрязнение
• газонные экосистемы
• экологические функции
• кремний
• мелкоделяночный опыт
• сахара
• стрессоустойчивость