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Soil salinity manаgement manual | Part I.Soil salinity management in the Eurasian Region
Experience has shown that improved technologies for growing fodder crops and their mixtures can
help to achieve higher quality and digestibility of animal feed. An analysis of the calorific values
of hay has demonstrated that mixed crop cultures provide better quality fodders, i.e.,
allowing
manufacturers to fully realize the bioenergetic potential of plants and to produce balanced foods
complying with animal husbandry regulations.
Atriplex nitens and annual weeds are particularly tolerant to irrigation by saline water. The maximal
production of green biomass occurs when the plants are actively growing and flowering. At the
time of seed production, their growth rate significantly declines, which has been confirmed by
correlation analysis. Therefore, annual halophytes can be harvested during
their growth and
flowering stages and included into animal diets. Later harvesting is not recommended because
plant structures undergo sclerification and loose their nutritional value.
Saline waters can be used for the irrigation of sandy desert soils so long as halophytes are included
within the crop rotation, as they can uptake up to 40% of the salts from soil solution. This is an
obligatory condition of ecologically safe use of saline irrigation water.
The artesian water has a
neutral reaction (pH 7.4) and moderate salinity (EC= 5.6- 8.3 dS/m).
This technolohy has been successfully tested in the Kyzylkum Desert (Kanimekh District, Navoiy
Region, Uzbekistan), where local people traditionally practice livestock farming, which both
supports their livelihoods and their cultural values.
In seeking
to improve their income, the people of Kyzylkum increase the numbers of cattle they
keep without due consideration of the area and condition of pastures. Such improper use of
pastures and excessive grazing pressures present serious threats to biodiversity. Therefore, there
is an urgent need to establish a better system of fodder production
with a decrease in grazing
pressure.
The suggested technology is very cost-effective and can produce the following yields per hectare:
• 3-5 tonnes of winter wheat straw and 1.5-2.0 tonnes of winter wheat grain;
• 48-78 tonnes of silage made of maize, sorghum or millet;
• 14.4-15.0 tonnes of hay of alfalfa (lucerne);
• 23 tonnes of above-ground
biomass of liquorice;
• 5-10 tonnes of hay of halophyte species.
Non-traditional fodder crops as either pure or mixed cultures produce hay yields of 15- 30 t/ha
and have a high nutritional quality.
The benefits of implementing this technology include a) an improvement of the soil quality, b) the
protection of the upper layer of soil via the restoration of vegetation cover and c) the prevention
of overgrazing of pastures by more efficient management of fodder production on irrigated lands.
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