| Study on spatial and temporal variabilities of soil moisture and salt during freeze-thawing period in cotton field with drip irrigation |
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| DOI：10.7606/j.issn.1000-7601.2016.05.41 |
| Key Words: coefficient of variation freeze-thawing period cotton field with drip irrigation soil moisture and salinity |
| Author Name | Affiliation | | Hudan Tumarbay | College of Water Conservancy and Civil Engineering, Xinjiang Agricultural University, Urumqi, Xinjiang 830052, China | | ZHAO Yong-cheng | Xinjiang Ecology and Geography Institute, Chinese Academy of Sciences, Urumqi, Xinjiang 830011, China | | Mahemujiang Aihemaiti | College of Water Conservancy and Civil Engineering, Xinjiang Agricultural University, Urumqi, Xinjiang 830052, China |
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| Abstract: |
| The coefficient of variation of the classical statistics was used to analyze the spatial-temporal dynamic variability characteristics of soil moisture and salinity content in the cotton field of Shihezi district in Xinjiang Uygur Autonomous Region, China. The results indicated that during the whole freezing and thawing period, for all soil layers, the coefficient of variation in soil moisture with bare land treatment (L) was higher than that with the mulching treatment (M). At the maximal depth of frozen soil layer around 90 cm, soil salinity exhibited strong variability with a coefficient of variation up to 1.1. Soil content demonstrated moderate variability in the vertical profile, and salinity content presented strong variability. During the whole freezing and thawing period, changes of salinity in frozen zone varied little with both bare land and mulching treatment, the 120 cm soil layer was stable for salinity accumulation, indicating that mulching had no significant effect on the layer beneath 120 cm. The results in this paper could be considered as a theoretical basis for prevention of the secondary salinization in soil, which would be conducive to the sustainable and safety use of the local farmland. |
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