Ikufīziyuluzhī-i Giyāhān-i Zirā̒ī (Feb 2024)
Investigating the Effect of Microbial Inoculation on the Efficiency of Element Consumption and the Quality of Peppermint (Mentha piperita L.) under Drought Stress
Abstract
The aim of this study was to investigate the effect of microbial inoculation on nutrient efficiency and quality of peppermint under drought stress in 2 crop years 2017-2018 and 2018-2019 in the Agricultural Research Center of Sarableh city located in Ilam province. This experiment was performed as a split plot in a randomized complete block design with 3 replications. Experiment with 2 factors, including drought stress in 3 levels of full irrigation (control), 70 and 50% of field capacity in main plots and growth-promoting bacteria and mycorrhiza in 6 levels including 1-control, 2-solute isolate Siderophore solvent + drought tolerant enhancer isolate, 3- mineral phosphate solvent isolate + drought tolerant enhancer isolate, 4- siderophore solvent isolate and drought tolerant enhancer isolate + dissolution isolate Mineral phosphate and isolates were increased by drought tolerance, 5-nitroxin commercial fertilizer and 6- mycorrhiza in subplots. The results of this study showed that most menthol essential oil in the combined treatment of siderophore soluble isolates and drought tolerant isolates + mineral phosphate soluble isolates and drought tolerant isolates and stress 50% of field capacity 24.2% was obtained compared to the lowest amount, ie control and full irrigation; Showed a 26% increase. At all levels of microbial inoculation except microbial fertilizer, the highest essential oil was always obtained at a stress of 50% of field capacity. The highest yield of peppermint essential oil was obtained in the treatment of commercial microbial fertilizer in the second year at the rate of 139.2 kg.ha-1. Microbial inoculation under stress at 50% of field capacity caused a 21% increase in dry shoot yield compared to the same level of stress in control. Growth-promoting bacteria and mycorrhizae increase quantitative and qualitative yield and increase the efficiency of nitrogen and phosphorus, which can have a significant effect on reducing costs and maintaining the ecosystem of agricultural systems.
