Water Management in Agriculture

Water Management in Agriculture

Drip Irrigation under Saline Water Use

Authors
Ali Mohammad Cheraghi 1
Hossein Dehghanisanij 2
1 Assistant Professors, Soil Conservation and Watershed department, Fars Agricultural and Natural Resources Research and Education Center, Agricultural research, Education and extension Organization, Karaj, Alborz, Iran
2 Associate Professor, Pressurized Irrigation Department, Agricultural Engineering Research Institute, Agricultural research, Education and extension Organization, Karaj, Alborz, Iran.
Abstract
Drip irrigation has some specific advantages under saline condition in comparison with other irrigation methods. Research has shown that this method of irrigation increases crop salt tolerance and yield under saline condition. Soil salinity under dripper where most of the roots are concentrated is usually low and increases with distance from emitter. Soil salinity under emitter can be even lower than irrigation water salinity. A change in salinity around dripper is due to changes in leaching fraction in this region. Leaching fraction is highest under dripper and is lowest on the periphery of the wetted zone where salt accumulation is greatest. This is of special concern for row crops with regard to placement of drip line and planting row. Factors which affect root zone soil salinity under drip irrigation include: irrigation water salinity, amount of irrigation water, soil texture and placement of drip line with regard to plantring row. Effect of these factors on soil salinity in the root zone is discussed in this paper.
Keywords
Saline water
Crop salt tolerance
Leaching fraction
Soil salinity
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Water Management in Agriculture
Volume 4, Issue 1
September 2017
Pages 1-8