| Variation and use efficiency of soil moisture under different salt content in cotton field with drip irrigation |
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| DOI：10.7606/j.issn.1000-7601.2013.03.14 |
| Key Words: cotton drip irrigation soil moisture soil salinity dry material daily evapotranspiration amount water use efficiency |
| Author Name | Affiliation | | LI Dongdong | Department of Resources and Environmental Science, Shihezi University, Shihezi, Xinjiang 832003, China | | WANG Haijiang | Department of Resources and Environmental Science, Shihezi University, Shihezi, Xinjiang 832003, China | | LV Xin | Key Laboratory of Oasis Ecologieal Agriculture, Xinjiang Produciion and Construction Corps, College of Agriculture, Shihezi University, Shihezi, Xinjiang 832003, China |
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| Abstract: |
| In order to investigate water-salt interaction effect in drip irrigation cotton,soil moisture content,daily evapotranspiration amount, alternation pattern of cotton dry material accumulation, and water use efficiency of cotton dry material were studied in the soils of different salt content under drip irrigation. An indoor simulation experiment was designed and performed to obtain cotton evapotranspiration and dry material aecumulation level by weighing method. The alternation pattern of cotton
daily evapotranspiration level,dry material accumulation amount, and soil moisture content in soils of different salt content(0(control)、0.15%、0.25%、0.35%.0.45%、0.55%、0.65%)were analyzed as well as the cotton dry material water use efficieney. Along with advancement of cotton growth period, variation of soil moisture content and daily average evapotranspiration level of different salt content were first increased and then decreased; Soil daily average evapotranspiration reached the maximum level at cotton buds-bolls period; Cotton dry material accumulation and water consumption amount decreased with inerease of soil salinity content. T5 treatment had highest cotton dry material water use efficiency. However, it did not show signifieant differenee compared with CK, T1, T2 and T5, which indicates that moderate amount of salt content in soil can effectively improve water use efficiency at certain extent. |
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