| Research on transport and accumulation characteristics of soil salinity of cotton field under film mulched drip irrigation in arid areas |
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| DOI：10.7606/j.issn.1000-7601.2011.05.26 |
| Key Words: drip rate wetted front soil salinity accumulation drip irrigation under the mulching years of irrigation lasting |
| Author Name | Affiliation | | Hudan·Tumaerbai | College of Water Conservancy and Civil Engineering, Xinjiang Agricultural University, Urumqi, Xinjiang 830052, China | | YI Pengfei | College of Water Conservancy and Civil Engineering, Xinjiang Agricultural University, Urumqi, Xinjiang 830052, China
Yili Normal University, Yili, Xinjiang 835000, China | | WANG Yimin | College of Water Conservancy and Civil Engineering, Xinjiang Agricultural University, Urumqi, Xinjiang 830052, China | | ZHANG Jinzhu | College of Water Conservancy and Civil Engineering, Xinjiang Agricultural University, Urumqi, Xinjiang 830052, China | | WU Zhengguang | College of Water Conservancy and Civil Engineering, Xinjiang Agricultural University, Urumqi, Xinjiang 830052, China |
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| Abstract: |
| Experiments were conducted to study different drip rate, irrigated water amount, irrigation scheduling and irrigation years on the characteristics of the soil salinity transport and accumulation. The results showed that the smaller drip rate, the less soil salinity on the single infiltration section and interference infiltration section; With the increase of the drip rate, the soil salinity has a increasing tendency when further and further away from single infiltration section or interference infiltration section. Through comparison of the soil water content in the same wetness level, the soil salinity was bigger in the interference infiltration section than in the single infiltration section. At the same drip rate, the more the water drops, the deeper the soil salinity could move. High frequency of irrigation effectively reduced the salinity of root area, while the treatment of low frequency made a big change in salinity, and it showed a accumulating phenomenon at the growth period. When the quantity of drip irri
gation increased from 3 300 to 3 900 and 4 500 m3/hm2, the peak value of salinity moved deeper from 60 to 80 and 100 cm. With the long lasting of drip irrigation, the 0～100 cm soil salinity showed a increasing tendency. The accumulated layer of soil salt were moved to the topsoil, and the 0～100 cm salinity showe
d significant difference (P＜0.05) between cotton fields with 6～7 a difference of drip irrigation lasting. |
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