Salinity not only decreases the agricultural production of most crops, but also, effects soil physicochemical properties, and ecological balance of the area. The impacts of salinity include— low agricultural productivity, low economic returns and soil erosions , (Hu and Schmidhalter, 2002).
How does salinity affect agriculture?
Salinity not only decreases the agricultural production of most crops, but also, effects soil physicochemical properties, and ecological balance of the area. The impacts of salinity include— low agricultural productivity, low economic returns and soil erosions , (Hu and Schmidhalter, 2002).
How does soil salinity affect crop production?
Salinity becomes a problem when enough salts accumulate in the root zone to negatively affect plant growth . Excess salts in the root zone hinder plant roots from withdrawing water from surrounding soil. This lowers the amount of water available to the plant, regardless of the amount of water actually in the root zone.
How does waterlogging and salinity affect farmers?
Waterlogging and salinity are both detrimental to plant growth and yield, though in different ways. ... Waterlogging causes plants to become shallow-rooted , which results in salinization as salts move up because of capillary action that eventually makes the land inappropriate for agriculture.
How soil salinity affect plant growth?
Salinity becomes a problem when enough salts accumulate in the root zone to negatively affect plant growth . Excess salts in the root zone hinder plant roots from withdrawing water from surrounding soil. This lowers the amount of water available to the plant, regardless of the amount of water actually in the root zone.
What problems does salinity cause?
Salinity not only decreases the agricultural production of most crops, but also, effects soil physicochemical properties, and ecological balance of the area. The impacts of salinity include— low agricultural productivity, low economic returns and soil erosions , (Hu and Schmidhalter, 2002).
What are the causes and effects of salinity?
Salinity affects production in crops, pastures and trees by interfering with nitrogen uptake , reducing growth and stopping plant reproduction. Some ions (particularly chloride) are toxic to plants and as the concentration of these ions increases, the plant is poisoned and dies.
Does waterlogging cause salinity?
The combined salinity and waterlogging have more harmful effects on crop growth and yield than the individual effect. Waterlogging causes plants to become shallow-rooted, which results in salinization as salts move up because of capillary action that eventually makes the land inappropriate for agriculture.
How can waterlogging and salinity problems be overcome?
Bio-drainage, in which excess groundwater is removed from the soils by tree plantations by transpiration can be a feasible option. They can prevent the flow of saline drainage water into the river and restore the salinity levels in the river waters to the original natural levels of less than 250 mg/l.
How can we solve the problem of waterlogging and salinity?
Bio-drainage, in which excess groundwater is removed from the soils by tree plantations by transpiration can be a feasible option. They can prevent the flow of saline drainage water into the river and restore the salinity levels in the river waters to the original natural levels of less than 250 mg/l.
What causes high salinity in soil?
What Causes Soil Salinization? Soil salinization occurs when soluble salts are retained in the earth . It happens either naturally or because of improper anthropogenic activities, particularly farming practices. Besides, some earths are initially saline due to low salt dissolution and removal.
What causes soil salinity?
What causes salinization? Salinization on the soil surface occurs where the following conditions occur together: • the presence of soluble salts , such as sulfates of sodium, ... These areas receive additional water from below the surface, which evaporates, and the salts are left behind on the soil surface.
Where is soil salinity a problem?
Salinity problems occur under all climatic conditions and can result from both natural and human-induced actions. Generally speaking, saline soils occur in arid and semi-arid regions where rainfall is insufficient to meet the water requirements of the crops, and leach mineral salts out of the root-zone.
How do you stop salinity?
- Increase drainage for better flushing (to remove salts from the ground surface).
- Plant salt-tolerant crops to manage economic risks and to ensure land cover.
- Remove salt crystals from the surface mechanically.
- Restore the balance via chemical amendments (e.g., gypsum or sulfuric acid).
How does salinity affect sea life?
Salinity can affect the density of ocean water : Water that has higher salinity is denser and heavier and will sink underneath less saline, warmer water. This can affect the movement of ocean currents. It can also affect marine life, which may need to regulate its intake of saltwater.
What is considered high salinity?
Salinity is either expressed in grams of salt per kilogram of water, or in parts per thousand (ppt, or ‰). ... Depending on their location and source of fresh water, some estuaries can have salinities as high as 30 ppt . Seawater is on average 35 ppt, but it can range between 30 – 40 ppt.
