Mohsen Dehghani; Majid Jafaraghaee; Reza Mohammadikia
Abstract
Due to the deficiency of available water resources in our country, use of unconventional water seems to be necessary. In this regard, in order to study the effect of irrigation water salinity on yield and yield components of three varieties of cotton, this experiment was carried out in a randomized complete ...
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Due to the deficiency of available water resources in our country, use of unconventional water seems to be necessary. In this regard, in order to study the effect of irrigation water salinity on yield and yield components of three varieties of cotton, this experiment was carried out in a randomized complete blocks design and three replications in Rodasht Agricultural Research Station during 2 years. The main variable studied was Electrical Conductivity of irrigation water at four levels i.e. 4, 7, 10, and 13 dSm-1, and the sub-main factor was cotton varieties that included B557, Tabladila, and Deltapain 16. Statistical analysis of the results showed that the effects of salinity (EC) as well as some minerals, especially sodium ions, in irrigation water were significant (at the 1% level) on the boll yield, water consumption, water use efficiency, weight of 10 bolls, the number of bolls in each plant, and the number of green plants. Also, yield, irrigation water use efficiency, boll weight, number of bolls per plant, and the number of germinated plants of the studied varieties differed significantly.
Mohsen Dehghani; Masoud Tadayonnejad; Mohammad Feizy
Abstract
In order to study the effect of irrigation frequency and water quality on yield and yield components of wheat, a study was conducted in Rodasht Agricultural Research Station, for 3 years. The experiment was laid in a randomized complete block design with three replications. Irrigation water quality ...
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In order to study the effect of irrigation frequency and water quality on yield and yield components of wheat, a study was conducted in Rodasht Agricultural Research Station, for 3 years. The experiment was laid in a randomized complete block design with three replications. Irrigation water quality treatments had electrical conductivities (EC) of 4, 8, and12 dSm-1 and were assigned to the main plot. Treatments of irrigation frequency were based on the percentage of management allowable depletion (30%, 50%, and 70%) and were allocated to the sub-plots. Statistical analysis results showed that the effect of irrigation water quality and irrigation frequency on the yield, water use, water use efficiency, weight of 1000 grains, and protein content was significant at the one percent level. The highest yield was produced by 30% management allowable depletion and 4 dSm-1irrigation water EC and reached 14593 kg.ha-1, while the lowest yield belonged to 70% management allowable depletion and 12 dSm-1 irrigation water EC yielding only 7347 kg.ha-1. The highest percentage of protein was related to the same treatment. The highest water use efficiency of 0.99 kg.m-3 belonged to 70% management allowable depletion and 4 dSm-1 irrigation water EC.