فهرست مطالب m. farasati

In order to investigate the effect of Cenocarpus extract on the resistance of spinach to drought stress, a factorial experiment was conducted in the form of a randomized complete block design with two replications in the crop year 2019-2020 in the research greenhouse of Gonbad Kavous University. Experimental treatments including 5 levels of drought stress (0.10, 0.20,0.30,0.40 and 0.50 MAD) and 5 levels of extract (0, 2%,4%, 6% and 8%) were applied. The results showed that the greatest increase in consumption efficiency in the growth period and total water consumption was obtained from the 6% extract concentration with values of 1.045 μg/mL and 0.235 μg/mL, respectively. The efficiency of water consumption based on dry weight and the efficiency of water consumption on wet weight of the treatment without extract were obtained as 603.2% and 695.8%, respectively. The results of the comparison of the average weight of aerial parts under water stress and from the treatment of 2% extract were obtained. The maximum root length was obtained with 8.17 and 8.07 cm for 20% and 30% drainage, respectively, and the minimum root length belonged to the 50% moisture drainage treatment. The highest amount of chlorophyll, efficiency of consumption during the growth period and total water consumption were obtained from the control treatment, and also the highest efficiency of water consumption per dry weight and efficiency of water consumption per wet weight were obtained from the 2% extract treatment.

In this research, the impact of the Alagol wetland on the water treatment of Atrak River was studied. From June, 2016, to May, 2017, on the fifteenth day of the month, four samples of water were collected from the middle and the outlet of the wetland. Also, the wetland was fed only in the months of September, November and February. The parameters of acidity, electrical conductivity, phosphate, nitrate, dissolved oxygen, biochemical oxygen demand, chemical oxygen and ammonia were measured. The water pH at the entrance and exit was significantly different. EC was higher at the entrance, and its value was decreased in the middle and output. DO in the outlet of the wetland was higher than that in the middle and inlet, indicating the improved water quality and high dissolved oxygen in the wetland output. NO3, NH4, PO4, BOD and COD were higher at the entrance to the wetland; also, it was decreased in the outlet and middle, and the difference was significant. Further, according to the results of September, November and February, which were fed to the wetland, water quality in the middle and outlet of the wetland was improved toward the entrance of the wetland. According to the results, Alagol wetlands could reduce the phosphorus, ammonia, BOD, COD and DO, and their concentrations were lower than the limit. However, given that the salinity at the entrance of wetland was too high, its amount in the output was higher than the standard limit and the wetland could not significantly reduce salinity. The results of this study showed that that of water pollution in the inlet, except that the dissolved oxygen parameters and the temperature were high and decreased in the middle outlet. Due to the quality of the wetland outlet, Alagol wetland water could be used for fish farming centers.