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锘? Surface irrigation is an ancient water technology field
facilities Authentic
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developing countries, a widely used method of irrigation, about the world in
more than 90% of irrigated area. There are more than 98% of China's irrigated
area is still using the traditional surface irrigation techniques. In view of
our water and energy shortages, lack of economic strength, the majority of rural
areas, low level of technical management of the reality of large area spraying,
micro-irrigation and other advanced irrigation technology is also subject to
considerable limitations, so for a long period of time , the country also need
to increase the field engineering construction, and strong research and promote
water-saving type of surface irrigation technology. First, land formation,
designed the ditch, plot size and irrigation technical parameters Land formation
is to improve the quality of surface irrigation technology and irrigation to
reduce irrigation time and labor to improve irrigation efficiency and water
output is an important measure. Combined with the formation of land reform in
field engineering, planning long border (groove) for a short stretch of
(communication), wide stretch of the narrow stretch of change design and
reasonable size Authentic
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greatly improve irrigation uniformity and irrigation efficiency. Shaanxi
Luohuiqu studies show that the unit discharge into the plot for the 3 ~ 5L s,
the irrigation quota changes with the long cardigan, cardigan long as 30 meters
from 100 meters to, the irrigation quota to reduce 150 ~ 204m? hm?; when the
plot of 30 ~ 100 meters long, the stretch of unit discharge from 2L s to 5L s,
scale irrigation can reduce the 150 ~ 225m? hm?. Baojixia Irrigation contrast to
deep percolation test, the irrigation quota is less than 675m? Hm?, Basically
does not occur seepage; irrigation quota 825 ~ 990m? Hm?, About 150m? Hm? Deep
infiltration of water produced leakage; irrigation quota 1350m? hm? when half of
the water seepage into deep water. China's large territory and local differences
in topography and soil, so the difficult uniform standard throughout the field
test results should be based on established computer models, experiments and
computer simulations, are given appropriate for the local irrigation Qigou size
and technical parameters. Second, improving wet surface irrigation methods, the
development of local sub-irrigation Improve the traditional surface irrigation
wetting all the way to furrow (Border) wet alternate irrigation or partial
irrigation Authentic Cam
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the total evapotranspiration accounts for the proportion of farmland, so that
the field soil water use efficiency can be significantly improved, and can
better to improve the crop root zone soil permeability, promote deep root system
bar, is conducive to the use root deep soil water storage, dual characteristics
of both water and increase production, is worth promoting. Practice shows that
wheat and maize intercropping repeat irrigation, cotton, corn and other row
crops across wide furrow irrigation or furrow irrigation, wet area can be
reduced by 50%, saving up to 30%, and yield increased 5% to 10%. Maize sowing
with water, can water 900m? Hm?, Saving 90 to 105 kwh, an increase rate of about
16% Authentic
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water distribution methods, the development of intermittent irrigation Improve
water distribution methods, the traditional trench, cardigan a Drainage changed
to the intermittent water distribution, intermittent irrigation (also known as
surge flow irrigation), known as the 80's a big surface irrigation technology
breakthrough. Drainage flow was intermittent to surge forward like, because the
soil pores will be automatically closed, the soil surface to form a thin closed
layer of water to promote faster. When using the same amount of water in
irrigation, intermittent irrigation for continuous irrigation flow forward from
1 to 3 times, thus greatly reducing the seepage and improve irrigation
uniformity, field water utilization factor of 0.8 to 0.9. 4, improved furrow
Drainage Facilities Drainage facilities improved furrow, using siphon (for open
channel water) or terrestrial mobile gate hole pipe (for pipe) Drainage,
Drainage Authentic
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farmland in Xinjiang reached 23.33 hectares Sergei
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began to promote. Rotary irrigation situation is ditching film film ridge
irrigation, irrigation training ridge film, film hole irrigation, irrigation
ditch membrane, membrane seam irrigation, cell membrane field irrigation