Milad Doosthosini; Hamid sodaiezadeh; Rostam Yazdani-Biouki; Mohammad Reza Sarafraz Ardakani; Mohammadali Hakimzadeh
Abstract
This studywas conducted as a completely randomized design with 3 replicates at Research Greenhouse of National Salinity Research Center, during 2017-18 growing season. Treatments were seven levels of water salinity: 3 (control), 10, 20, 30, 40, 50 and 60 dS.m-1. Throughout the experiment, plant length, ...
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This studywas conducted as a completely randomized design with 3 replicates at Research Greenhouse of National Salinity Research Center, during 2017-18 growing season. Treatments were seven levels of water salinity: 3 (control), 10, 20, 30, 40, 50 and 60 dS.m-1. Throughout the experiment, plant length, fresh weight, dry weight, leaf area, chlorophyll content, soluble sugars and proline were measured. Results showed that salinity treatments significantly affected all the traits. Salinity significantly reduced plant height, such that plants in 60 dS/m were 12.37% shorter than those of 3 dS/m. Fresh weight, dry weight, leaf area, chlorophyll a, and total chlorophyll were increased by increasing stress level from 3 to 30 dS/m, but then significantly decreased by increasing salinity up to 60 dS/m. Increasing salinity from 3 to 30 dS/m increased plant dry weight by 3.7 g per plant, but increasing it to 60 dS/m reduced dry weight. Increasing salinity to 60 dS/m led to enhanced proline (52.03%) and soluble sugars (21.21%). Salinity tolerance threshold of Suaeda fruticosa was 31 dS m-1 and the slope of dry matter decrease was 0.22% per increase in each salinity unit.
Abdollah BeykKhormizi; Siavash Hosseini Sarghein; Mohammad Reza Sarafraz Ardakani; Seyed Mohammad Moshtaghioun; Seyed Mousa Mousavi Kouhi
Abstract
In order to investigate the effects of interaction between sodium chloride-induced salinity and organic fertilizer, vermicompost, on the vegetative growth and some mineral nutrieants in fennel (Foeniculum vulgare), a factorial experiment as a randomized complete block design with three replicates was ...
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In order to investigate the effects of interaction between sodium chloride-induced salinity and organic fertilizer, vermicompost, on the vegetative growth and some mineral nutrieants in fennel (Foeniculum vulgare), a factorial experiment as a randomized complete block design with three replicates was conducted in the research greenhouse of Yazd University. Experimental treatments consisted of salinity levels of control (non-salty), 40, 80, and 120 mM NaCl, vermicompost levels of 0 and 5 volume/volume percent (two volumetric mixtures of vermicompost and soil including 0:100% and 5:95%), and fennel landraces of Urmia, Mashhad, Shiraz, Boushehr, and Isfahan. Sampling of plants was carried out 5 weeks after planting. Results showed that salinity stress significantly decreased dry weight and the length of shoot, leaf area, dry weight of root, concentration of potassium, calcium, zinc, and molybdenum of shoot, and concentration of potassium and calcium in root. Under both stress and non-stress conditions, all of these traits were significanly increased with application of vermicompost. Concentration of sodium in root and shoot was also significantly increased under salinity stress, while it sharply decreased in the presence of vermicompost. Based on the results, among the investigated fennel landraces, Mashhad landrace was the most sensitive to salinity stress. Shiraz landrace is recommended for cultivation in non-stress, and salt-affected conditions, and also under vermicompost application. It seems that the use of vermicompost can reduce the adverse effects of salinity on fennel growth.