Author: Knowledge Management in CACILM Phase II, ICARDA.
Definition of technology:
The technology of soil protection from irrigational erosion based on use of anti-erosive preparation.
Brief summary of technology:
The irrigational erosion in Uzbekistan covers the area of 686 thousand ha, only in the Tashkent province there are 138 thousand ha of irrigated land demanding anti-erosion measures.
Irrigational erosion causes an average annual leaching of 100-150 t/ha of soil elements in gray soils, and 0.5-0.8 t/ha of humus, 100-150 kg/ha of nitrogen and 75-100 kg/ha of phosphorus are thus lost. This in turn causes a reduction of thickness of the humus layer, loss of plant nutrients, decrease of productive moisture, worsening of water-physical, agrochemical and biological soil properties. Erosion processes in the agricultural areas of the country cause annual losses of more than 200 thousand tons of raw cotton. Long-term experiments showed that application of K-9 preparation, chlorella and green manure promotes increase of anti-erosion stability of irrigated eroded soils and improvement of their water-physical properties. The increase of cotton raw yields is 0.3-0.5 t/ha.
Application of an anti-erosive preparation into irrigation furrows is mechanized by adaptation to a cotton cultivator PHP - 1.
Based on research, recommendations on the effective application of the new agrotechnical approaches, which prevent irrigational soil erosion, are developed.
Location: Tashkent province.
Area of technology application: 30 ha.
Stage of intervention: prevention of land degradation.
Main land use issues and the main causes of land degradation:
Irrigational erosion accompanied by leaching of a fine soil materials, mineral fertilizers, pesticides with water.
Absence of anti-erosion measures in the current farmer practice.
Main technical features of technology:
Prevention of an irrigational erosion, improvement of a soil cover, increase of organic matter and nutrients.
Type of land use Conservation measures
Irrigated arable land.
Land used for cultivation of agricultural crops - Во(Са).
А3: processing of soil surface.
Habitat Anthropogenic environment
Average annual rainfall: 250-500 mm.
Altitude (meter above sea level): 100-500 m.
Landscape: foothill slopes.
Slope (%): gentle slope, steep slope.
Soil fertility: moderate.
Humus content in arable horizon: 1-3%.
Natural soil drainage/infiltration: moderate.
Size of land area (ha): 30 ha.
Land ownership: state, long term lease.
Water use rights: through WUAs and irrigation management bodies.
Market orientation: mixed farming (subsistence and commercial).
Impact of technology
- elimination of irrigational erosion;
- improvement of water-physical soil properties (density, water penetration);
- increase of crop productivity.
Acceptance/adoption of technology: external financial support is required.
Reference(s): Catalog III of Republican fair of innovative ideas, technologies and projects, Tashkent 2010.
O.E. Hakberdiyev's technology, State research institute of Soil Science and Agrochemistry.
Name of person (s) collected this description: Prof. Ma`ruf Tashkuziyev, State research institute of Soil Science and Agrochemistry.
Address: 3, Kamarniso str.,Tashkent, Uzbekistan.
Tel.: +998 71-227 13 99; +998 90-997 57 84