Investigation the use of Irrigation by Caspian Seawater on Sweet Pepper (Capsicum annum) under Greenhouse conditions

Document Type : Complete scientific research article

Authors

1 PhD student, Water engineering department, Faculty of agriculture, Ferdowsi university of Mashhad.

2 water engineering department, faculty of agriculture, ferdowsi university of mashhad.

3 PhD student, water engineering department, Gorgan university of agricultural science and natural resources.

Abstract

Background and Objectives: Population growth as well as global fresh water shortage problem have necessitated the use of unconventional water resources in agricultural sector, as the largest consumer of fresh water, especially in arid and semi-arid regions. Salinity is a major environmental stress, limiting plant growth and yield. Determining the extent of salinity tolerance in agricultural and horticultural crops helps overcome the problem. The goal of this study Investigation the use of Irrigation by Caspian Seawater on Sweet Pepper (Capsicum annum) cv. California wonder under Greenhouse conditions.
Materials and Methods: In this study, five mixing use of seawater and fresh water is evaluated on yield and yield components of Sweet Pepper (CV. California wonder). the research was done based in completely randomized design including 3 replications as pot planting under greenhouse conditions in Gorgan University of Agricultural Sciences and Natural Resources during 2016. Research Station is located in north of Iran at 36° 51' N latitude and 54° 16' E longitude at the south-east corner of Caspian Sea and its height from sea level is 13.3 meters. Soil texture is silty clay. In this study salinity factors consist of 5 levels (0.5, 3.0, 5.5, 8.0 and 10.5 dSm-1). Data obtained (Fruit Fresh and dry weights, Fruit number, Yield, Water use efficiency) were analyzed using statistical software SAS. Ver. 9.0 and the means were compared using LSD range test at 5 % percent.
Results: The results showed that effect of irrigation water salinity on fresh and dry weight of fruit, number of fruit per plant, yield and water use efficiency were highly significant at 1 percent levels (p>0.01). The result showed that the 10 percent mixture of seawater and tap water irrigation regimes compared to other regimes after control regimes had the highest Fruit Fresh and dry weights, number of fruits, yield and water use efficiency, respectively.
Conclusion: The result showed that increasing salinity decreased all characteristic measured, increasing of irrigation water salinity from 0.5 to 3.3 ds/m (10 percent mixing of sea water + tap water) has resulted to redaction of fruit fresh weight and yield to 50.5 and 48.4 percent. The results indicate that sweet pepper plants are sensitive to salinity, mixing of sea water and tap water to irrigate the plants in this greenhouse is not applicable. The results indicate that sweet pepper plants are sensitive to salinity, mixing of sea water and tap water to irrigate the plants in this greenhouse is not applicable.

Keywords

References

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Journal of Water and Soil Conservation
Volume 25, Issue 1
March and April 2018
Pages 243-256

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