Abstract
The effect of fertigation on the physicochemical properties of soil was estimated. Three fertigation procedures with different salinity levels were tested. The effect of precipitation on soil desalination through salt leaching was controlled by comparing changes in soil electrical conductivity during and after vegetation. Soil aggregate stability was measured as an indicator of soil degradation. The electrical conductivity of soil during pre-sowing (or after sowing) treatment was higher than at the end of the growing season. This difference decreased significantly, becoming insignificant after winter due to the effective dissolving effect of rain and snow. The article considers the issues of natural soil desalination, taking into account precipitation. Studies of soil desalination by leaching of salts were described. It was revealed that in the short term fertigation is not harmful to the soil if the amount of precipitation is sufficient.
Highlights
Irrigation water is a major limiting factor for agricultural production
The results showed that electrical conductivity of the soil (EC) does not significantly differ from that of the site, which means that the difference between the EC values for different fertigation methods at two depths varies slightly with time (p = 0.173> 0.05 ) (Fig. 5., Fig. 6.)
Increased soil salinization by fertigation methods is caused by rising costs of fresh water, which led to the use of salt water for irrigation purposes
Summary
Irrigation water is a major limiting factor for agricultural production. Irrigated lands produce more than 40% of food and provide nearly 80% of water consumed. The use of water with high salinity is one of the most likely options for meeting the needs. Sources of these waters are drainage water from irrigated agriculture, municipal wastewater and groundwater of poor quality. The risk of saline soils is always higher in soils with a fine texture than in soils with a large texture. This is due to the fact that sandy soils naturally have larger pores, which provide faster drainage [1,2,3]
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