جستجوی مقالات مرتبط با کلیدواژه "آب دریا" در نشریات گروه "آبخیزداری، بیابان، محیط زیست، مرتع"

Halophytes are one of the essential parts of haloculture that do not compete for the occupation of lands and freshwater resources. Salicornia persica Akhani grows naturally in the southern coastal and desert areas of Iran. This study was conducted to evaluate the effect of two irrigation water quality treatments (seawater and shrimp farm waste-water with electrical conductivity of 64.5 and 66.4 dS m-1 m, respectively) and potassium sulfate fertilizer treatment (with three levels of 0, 100 and 200 kg ha-1) on the amount of forage produced (yield) and height of this plant was investigated in factorial experiment based on randomized complete blocks. The results showed that the yield of Salicornia dry forage under irrigation with seawater and shrimp field waste-water irrigation was 1136.92 and 740.8 kg ha-1, respectively, with significant differences. Investigation of the interaction effects of irrigation treatment (two levels) and potassium sulfate fertilizer (three levels) showed that the highest forage production yield was related to the treatment of 100 kg ha-1 of potassium sulfate fertilizer irrigated with seawater at the rate of 1538.8 kg ha-1 of dry forage .There was no significant difference between plant height related to irrigation treatments and potassium fertilizer application. The results showed that the production of Salicornia under irrigation treatments with seawater and shrimp farm waste-water is possible and consumption of 100 kg ha-1 of potassium sulfate increases yield. Further research was proposed to improve the production potential of this saline plant through agricultural operations and selection of superior germplasms using seawater and shrimp farm waste-water.

This study was conducted in two separated experiments in the National Salinity Research Center in 2016. In the first experiment, the effect of 12 priming treatments consisted of potassium nitrate, sodium chloride, calcium chloride, and GA3 with control were investigated on seed germination of Salicornia (Salicornia bigelovii var. LVYUAN no.1) in order to select the best priming for the second experiment. In the second experiment, the effects of different salinity levels (12.5, 25.0, 37.5 and 50.0 dS m-1) and GA3 concentrations including 500 and 1000 mg L-1 were also evaluated on seed germination of the Salicornia genotype. The salinity treatments were prepared by different percentage of Persian Gulf water. The results showed that all the priming treatments increased germination percentage compared to the control, and the highest effect belonged to the concentrations of 500 and 1000 mg l-1 of GA3,by 142.3% and 119.1%, respectively. It was revealed in the second experiment that salt stress significantly reduced percentage and rate of seed germination, so that salinity treatments as 12.5, 25.0, 37.5 and 50.0 dS m-1 could reduce germination percentage by 11.8%, 40.3%, 63.3% and germination rate by 81.4% and 21.3%, 40.0%, 62.3% and 70.1%, respectively. However, GA3 priming could improve the salt tolerance and compensate a part of this loss, especially at 500 mg L-1. Application of GA3 increased salt tolerance threshold of Salicornia at germination stage. In no prim and GA3-priming treatments at 500 and 1000 mg L-1, salinity tolerance thresholds were 4.15, 9.31 and 6.56 dS m-1 and the threshold of 50% reduction was 20.36, 35.97 and 31.39 dS m-1, respectively. In general, the results indicated that seed germination and rate of Salicornia were improved using GA3.