M. Parsa; R. Kamaei; B. Yousefi
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 ...
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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.
M. Talezade; A. Nezami; M. Parsa; J. Nabati; R. Tavakkol Afshari
Abstract
Domestication, cultivation and crop production of Bunium persicum (Boiss.) B. Fedttsch. are important to preserve genetic resources of the species. In this regard, in order to identify the proper medium and nutrient solution for the seedling establishment of B. persicum, a factorial experiment in a completely ...
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Domestication, cultivation and crop production of Bunium persicum (Boiss.) B. Fedttsch. are important to preserve genetic resources of the species. In this regard, in order to identify the proper medium and nutrient solution for the seedling establishment of B. persicum, a factorial experiment in a completely randomized design was carried out under greenhouse conditions with three replications. Experimental factors consisted of culture medium at three levels of cocopeat, sand and soil, and Hoagland solution in five concentrations of 0, 25, 50, 75, and 100%. The results showed that the highest seedling emergence percentage (37.7) was observed in cocopeat without Hoagland solution. The highest seedling vigor index (773) and also green area of seedling (2.14 cm2/plant) and the lowest seedling vigor index (205) were observed in cocopeat and soil media (both with 75% Hoagland solution), respectively. Maximum tuberization percentage (100) was recorded in the sand with 50% Hoagland solution. The highest tuber weight (76.0 mg) and volume (79.2 mm3) were obtained in the sand with 75% Hoagland solution without any significant difference with the results of sand with 50% Hoagland solution treatment. Generally, the results of this study indicated that using a medium with suitable porosity and water holding capacity and also irrigation with at least 50% Hoagland solution can improve seedling emergence percentage, seedling establishment, and production of tuber with appropriate size in B. persicum.