ABSTRACT
Background: Considering the importance of using new technologies such as nano-technology the sustainable agriculture, and increase the yield and quality of crops, research in this direction is necessary
Objective: In this study was investigated the effect of foliar application of nano-iron and potassium chelate fertilizer on yield and quality of psyllium
Methods: In this research, the factorial experiment in a randomized complete block design with 12 treatments and 3 replications was carried out. The treatments of this experiment were consisted of three levels of nano-iron chelate [0, 1 and 2 g.L-1] and four levels of nano-potassium chelate [0, 2, 3 and 4 g.L-1] fertilizer
Results: The interaction of nano-iron and potassium chelated fertilizer treatments had a significant effect on the seed yield [P<0.01] and shoot dry weight [P<0.05]. The independent effect of nano-iron and potassium chelated fertilizer were significant on themost traits [P<0.01], number of seeds per plant, and yield of mucilage [P<0.05]. Interaction of 2 g.L-1 of nano-iron and 3 g.L-1 of potassium chelate fertilizer treatments, and also their independent effects had the most impact on the measured traits, especially yield of shoot dry weight, seed yield, mucilage content and yield of mucilage
Conclusion: According to the results, the use of nano-iron and potassium chelate fertilizer had positive effects on the efficiency of psyllium
ABSTRACT
Background: Biostimulants are amino acids and organic components, which can play main role in the plant growth and dry matter accumulation
Objective: Determine the influence of foliar application of active amino acids on quality and quantity yield of Melissa officinalis L
Methods: This study was conducted in a research farm at the institute of medicinal plants on the base of randomized complete blocks design [RCBD] with three replications. The treatments were control [foliar application with distilled water] and commercial formulations of aminolforte, kadostim, fosnutren, and humiforte [each of them 2 L ha[-1]], and chemical fertilizer [70 kg ha[-1] N.P.K]
Results: The results indicated that a significant increase in the content of citronellal, neral, deltacadinene, germacrene, and geranial, were found in response to aminolforte and fosnutren application. The essential oil content was also increased through using kadostim and chemical fertilizer. A significant improvement in the plant height, number of flowers per stem, and SPAD value were observed in response to the foliar application of aminolforte. Morover, foliar application of fosnutren improved leaf length, leaf number, leaf area, leaf dry weight, and shoot dry weight, accordingly. There was no variation in the number of branches per plant among the treatments of kadostim and aminolforte; both of these treatments improved the attribute
Conclusion: The foliar application of free amino acids based on commercial formulations including aminolforte, kadostim, humiforte, and fosnutren can be effective on the quality and quantity yield of lemon balm
Subject(s)
Citrus , Amino Acids , Oils, VolatileABSTRACT
Thymus daenensis is on e of the endemic aromatic species in Iran that its essential oil is used in food and pharmaceutical industries. In this study, the effects of plant growth stages and distillation methods on essential oil content and thymol percentage of this species were evaluated. The aerial parts of Th. daenensis were collected in three stages of plant growth from Tehran province of Iran. The plant materials were dried in shade and their essential oils were isolated by hydro-distillation in three replications. In addition, the essential oils of plant materials at full flowering stage were obtained by hydro-distillation, water and steam distillation and steam distillation. The essential oils were analyzed by capillary GC and GC/MS. The result showed that the different plant growth stages and distillation methods had significant effect on essential oil content. The highest essential oil content was obtained at full flowering stage [2.28% w/w]. Among distillation methods, the highest essential oil content was obtained by hydro-distillation [2.27%] that was significant difference with other distillation method. There was no significant difference between essential oil composition at different plant growth stages. Also, thymol, p-cymene and y-terpinene were the main components. The highest percentage of thymol was obtained by hydro-distillation. Generally, it can be concluded that harvesting of Th. daenensis at full flowering stage and extraction of its essential oil by hydro-distillation were more suitable for obtaining the higher oil content and thymol percentage
ABSTRACT
Thymus kotschyanus Boiss. and Hohen. is an Iranian medicinal plants that grows in different areas of Iran such as Mazandaran, Gilan, Azarbayejan, Kurdistan and Tehran. The objective was to identify the essential oil content and composition in 15 Iranian populations of T. kotschyanus. The essential oils content and composition of 15 Iranian populations of T. kotschyanus were studied in a randomized complete block design [RCBD] with three replications. The aerial parts of thyme populations were harvested in the full blooming stage. The essential oils contents were obtianed by clevenger apparatus. For accurate measurement of the essential oils compounds, the oil samples analyzed by gas chromatography [GC] and gas chromatography coupled to mass spectrometry [GC-MS]. The results showed that the populations of T. kotschyanus had significant [p<0.01] differences in respect of essential oil contents. The highest essential oil content was found in the populations of Tehran, East Azarbayjan-I and East Azarbayjan-IV. The maximum thymol content was identified in the Kordestan-I population [40.42%] and the highest content of carvacrol was related to Kerman [33.08] and Zanjan-III [30.49%] populations, respectivily. Also, the thyme populations had significantly [p<0.01] differences in essential oil compositions except of carvacrol. Generally, 23 compounds in the essential oils were identified. The main constituents were carvacrol, thymol, borneol, 1.8-cinole, cymne [ortho[, carvacrol methyl ether, [z]caryophyllene, camphor, and linalool. Although, the populations of T. kotschyanus were planted in the same ecological and agronomical conditions, they had significant differences in terms of phytochemical traits, which probably could be due the genetic factors