Agriculture and horticulture
S. Azizi Balabiglou; A. Rahimi; S. Heydarzadeh; R. Holgoumi; I. Ataei
Abstract
To investigate the response of some quantitative and qualitative characteristics of peppermint (Mentha piperita L.) to organic fertilizers under low water stress, a factorial experiment was conducted in a randomized complete block design with three replications in the research farm of the Faculty of ...
Read More
To investigate the response of some quantitative and qualitative characteristics of peppermint (Mentha piperita L.) to organic fertilizers under low water stress, a factorial experiment was conducted in a randomized complete block design with three replications in the research farm of the Faculty of Agriculture of Urmia University in 2017-2018 crop year. Experimental treatments included organic fertilizer at five levels (control, cattle manure (20 ton ha-1), poultry manure (7 ton ha-1), vermicompost (10 ton ha-1), and compost (15 ton ha-1)) and soil moisture at three levels (50 (severe stress), 70 (moderate stress), and 90% (control: without stress) of field capacity). Low water stress decreased the content of leaf phosphorus or potassium, leaf phenols or flavonoids, and leaf relative water content and increased the leaf essential oil yield at full flowering stage. The highest amount of essential oil (1.58%) was observed under moderate stress conditions. Poultry manure and vermicompost significantly increased the amount of nitrogen, protein, and percentage of DPPH radical scavenging of leaves under low water stress compared to without stress conditions. The highest yield of essential oil (32.34 kg ha-1), stem dry weight (852.53 kg ha-1), leaf dry weight (1010.40 kg ha-1), and aerial parts dry weight (1863.93 kg ha-1) was obtained in the poultry manure treatment under optimal irrigation. Overall, organic fertilizers application under low water stress could be recommended to increase the plant yield and achieve sustainable agriculture.
Agriculture and horticulture
Z. Azimzadeh; A. Hassani; B. Abdollahi Mandoulakani; E. Sepehr
Abstract
Oregano (Origanum vulgare L.) is a perennial herbaceous plant belonging to the fam. lamiaceae that is used as a spice for flavoring foods and also for medicinal purposes as carminative, diaphoretic, expectorant, sedative, stomachic, diuretic, antitussive, and antirheumatic. To evaluate the effects of ...
Read More
Oregano (Origanum vulgare L.) is a perennial herbaceous plant belonging to the fam. lamiaceae that is used as a spice for flavoring foods and also for medicinal purposes as carminative, diaphoretic, expectorant, sedative, stomachic, diuretic, antitussive, and antirheumatic. To evaluate the effects of salinity stress on some growth and physiological parameters, essential oil content, and nutrients absorption in two oregano subspecies, a factorial pot experiment was conducted in a completely randomized design with three replications. The experimental factors included two subspecies of oregano (ssp. vulgare and ssp. gracile) and salinity stress at four levels (0, 25, 50, and 100 mM of NaCl). The results showed that the salinity stress had a significant effect on the measured parameters. With increasing the salinity level, the growth characteristics (plant height, stem diameter, number of leaves, and dry matter yield), leaf relative water content (RWC), chlorophyll index (SPAD), percentage and essential oil yield, N, P, and K content and K/Na ratio in leaves and roots decreased, while Na and Cl content in leaves and roots of both subspecies increased. The two subspecies response to the different levels of salinity stress was different. The higher Na accumulation in the roots and higher K/Na ratio in the leaves compared to the roots indicated the ability of oregano subspecies to limit the transfer and accumulation of Na+ ions in their shoots. Overall, the findings of this study showed that the ssp. vulgare had higher tolerance to the salinity stress than ssp. gracile due to the less accumulation of Na and Cl ions, higher K/Na ratio, and lower reduction in chlorophyll index and dry matter yield.
M.R. Ardakani; B. Abbaszadeh; M.H. Assare; F. Paknezhad; A. Kashani; M. Layegh Haghighi
Abstract
One of the methods of natural resource management is utilization of inefficient lands and use of resistant plant species in hard conditions. In this study, sampling from natural habitat in Arak (Markazi province) was conducted in 2009 at 3 growth stages including growth, full flowering and maturity using ...
Read More
One of the methods of natural resource management is utilization of inefficient lands and use of resistant plant species in hard conditions. In this study, sampling from natural habitat in Arak (Markazi province) was conducted in 2009 at 3 growth stages including growth, full flowering and maturity using plots with replication. In full flowering stage, plant height, number of tillers, big and small diameter, root length, root weight, chlorophyll, plant dry weight, soluble sugar content, proline, sodium, potassium, magnesium, calcium, chlorine and iron were measured. Mean comparison of morphological characters showed that the largest values of plant height, number of tillers, canopy cover, total shoot and flowering shoot were recorded for the region (locality 3) with less salinity (EC= 7.6 dS/m). The largest values of root length, root weight and essential oil percentage at growthing, full flowering and maturity stages were also recorded for locality 1 with high salinity (EC= 11.7dS/m). Locality 1 showed the highest content of soluble sugar, proline, sodium, potassium, magnesium, calcium, and chlorine. Locality 3 had the highest total content of chlorophyll, chlorophyll a and b while the highest iron content was related to locality 2. Results of correlation showed that there was negative significant relationship between plants height with essential oil percentage in full flowering stage. Significant correlation was also observed between soluble sugar and proline, magnesium, calcium and chlorine. There was significant negative correlation between soluble sugar and total chlorophyll 2. According to the results, Camphorosma monspilica L. is one of the salt tolerant plant species probably with medicinal and forage values.
