| Spatial variation of surface soil salinity in under-film drip irrigating of cotton field in irrigated areas of Manas River Basin |
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| DOI：10.7606/j.issn.1000-7601.2017.04.12 |
| Key Words: manas river basin irrigated areas under-film drip irrigated surface soil salinity spatial variability semi-variogram |
| Author Name | Affiliation | | XIN Ming-liang | College of Water Conservancy & Architectural Engineering, Shihezi University, Shihezi, Xinjiang 832000, China
Key Laboratory of Modern Water-Saving Irrigated of Xinjiang Bingtuan, Shihezi, Xinjiang 832000, China | | LU Ting-bo | College of Water Conservancy & Architectural Engineering, Shihezi University, Shihezi, Xinjiang 832000, China
Key Laboratory of Modern Water-Saving Irrigated of Xinjiang Bingtuan, Shihezi, Xinjiang 832000, China | | HE Xin-lin | College of Water Conservancy & Architectural Engineering, Shihezi University, Shihezi, Xinjiang 832000, China
Key Laboratory of Modern Water-Saving Irrigated of Xinjiang Bingtuan, Shihezi, Xinjiang 832000, China | | CAO Yu-bin | College of Water Conservancy & Architectural Engineering, Shihezi University, Shihezi, Xinjiang 832000, China
Key Laboratory of Modern Water-Saving Irrigated of Xinjiang Bingtuan, Shihezi, Xinjiang 832000, China | | WANG Meng-meng | College of Water Conservancy & Architectural Engineering, Shihezi University, Shihezi, Xinjiang 832000, China
Key Laboratory of Modern Water-Saving Irrigated of Xinjiang Bingtuan, Shihezi, Xinjiang 832000, China |
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| Abstract: |
| Using the methods of geostatistics and simple Kriging interpolation, this research investigated the spatial variation of surface soil salinity in the under-film drip irrigated of cotton field in plain irrigation areas of middle reaches of Manas River. The results showed that the variation coefficient of surface soil salinity after harvesting was 35.62%, presenting the moderate-intensity variability and following the normal distribution, meanwhile exhibiting a strong second-order trend effect especially for the midland. Isotropic semivariogram showed that Nugget coefficient was less than 25%, indicating that soil salinity had a strong spatial correlation under the influence of structural factors. Surface soil salinity after harvesting showed an anisotropy along the contour line and the isotropy perpendicular to the contour line, respectively. The spatial distribution of surface soil salinity after harvesting presented an obviously and continuously changing trend, and the moderate salinized soil, heavy salinized soil and saline soil were not detected in the research region. The mild salinized soil dominated the subsidiary irrigated areas, while the non-salinized soil was mainly located in the northeast region and mountain front area of southern region. |
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