Effects of different biofertilizers on elements, essential oil and yield of Peppermint (Mentha piperita L.) under drought stress conditions
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Article Type:
Research/Original Article (دارای رتبه معتبر)
Abstract:

In order to investigate the effects of different irrigation regimes and different fertilizer compositions on the yield indices and elements in peppermint (Mentha piperita L.), a factorial experiment was conducted in a completely randomized design with three replications at the research greenhouse of Ferdowsi University of Mashhad, during the growing season 2017-2018. Factors were consisted of irrigation regime at three levels including 100% FC, 75% FC and 50% FC, and fertilizer at five levels including 1-chemical fertilizer (NPK)+bacterial biofertilizer (NPP), 2- NPP, 3-NPK, 4-micronutrient fertilizer (MIC), 5-MIC + amino acid fertilizer (AP). In this experiment, dry weight, plant height, nitrogen, phosphorus, potassium, sodium, protein, SPAD number, essential oil content and yield were measured. The results of analysis of variance showed that irrigation regimes and different fertilizers had significant effects on dry weight, nitrogen, phosphorus, protein and essential oil content at 1% level and on SPAD number at 5% level. The highest dry weight (14.56 g) and phosphorus (0.43%) were observed in 100% FC treatment and the highest nitrogen (2.001%), protein (12.51%), SPAD number (45.3) and potassium (1.66%) were obtained in NPK+NPP fertilizer. Also, the highest essential oil content (1.64%) was measured in 50% FC treatment. The results of this study showed that under severe drought conditions, utilization of bacterial and chemical fertilizers combinations make growth and physiological characteristics of peppermint less affected by drought stress.

Language:
Persian
Published:
Iranian Journal of Medical and Aromatic Plants, Volume:35 Issue: 5, 2019
Pages:
860 to 875
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