Effect of Vermicompost on Macro and Micro Nutrients of Lettuce (Lactuca Sativa Var. Crispa) Under Salt Stress Conditions

Abstract

This study was conducted in order to determine the effect of vermicompost (V) on macro and micro nutrients of lettuce (Lactuca sativa Var. crispa) exposed to salt stress (SS). V doses; 0 (V0), 2.5% (V1) and 5% (V2) (w/w) and salt stress levels; control (SS0) (0 dS m-1 NaCl), medium salt stress (SS4) (4 dS m-1 NaCl), severe salt stress (SS8) (8 dS m-1 NaCl) were used. In order to make evaluation in terms of the nutrients, plants were kept under controlled conditions (relative humidity 50-55%, daytime/night time temperature 24/20 °C) in the greenhouse for 46 days (May 24 and July 10, 2017). While the medium and severe salt stress decreased the P, K, Mg, Fe, Mn and Zn concentrations of plants significantly, compared to the control, it caused increase in N and Na concentration. While Na decreased due to the V, other mineral element concentrations increased significantly and these increases were found more effective in 5% V application. The effect of SS x V interaction was statistically significant in terms of N, P, Mg, Na, Fe, Mn and Zn, whereas it was found insignificant for K, Ca and Cu. It was shown that in lettuce growing, V applications in areas with salinity problems could contribute to reducing the toxic effects of salinity on the plant and improving the imbalance in nutrient intake.

Biochar-based compost: a bibliometric and visualization analysis

“…The overlay visualization was used to show the trends in keywords used in the topic. For instance, the gradient color shown on the map, from blue to yellow, reveals the freshness of publications [ 73 ] and reveals recently appearing keywords. Before the keyword analysis, the authors standardized the keywords manually because based on [ 74 ] different expressions of the same keywords might cause errors in the findings.…”

Multifaceted Ability of Organic Fertilizers to Improve Crop Productivity and Abiotic Stress Tolerance: Review and Perspectives

“…Biochar is also an important organic material and its application under saline conditions improves root growth, dry matter production, leaf area, and yield compared to control conditions [168]. The addition of organic fertilizers (Vermicompost and biogas slurry) also increases the availability of nutrients (Ca, Fe, Mg, Mn, K, and Zn) and reduces the accumulation of toxic ions (Cl − and Na + ), resulting in a significant increase in plant height, dry matter and final productivity [162][163][164]. Another group of authors also found that under saline conditions, organic fertilizers improved the RWC, stomata conductance, chlorophyll synthesis, and activity of antioxidants (APX, CAT, and SOD) that decreased MDA production and electrolyte leakage, thereby preventing the toxic effects of salinity on plants [165][166][167].…”