| Effect of halophytes on improving saline-sodic soil of cotton field with drip irrigation under plastic film |
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| DOI：10.7606/j.issn.1000-7601.2018.06.05 |
| Key Words: drip irrigation under plastic film cotton halophytes ratio of desalinization growth characteristics |
| Author Name | Affiliation | | ZHANG Yan-chao | State Key Laboratory Base of Eco-Hydraulic Engineering in Arid Area, Xi’an University of Technology, Xi’an, Shaanxi 710048, China | | SHI Wen-juan | State Key Laboratory Base of Eco-Hydraulic Engineering in Arid Area, Xi’an University of Technology, Xi’an, Shaanxi 710048, China | | MA Yuan | State Key Laboratory Base of Eco-Hydraulic Engineering in Arid Area, Xi’an University of Technology, Xi’an, Shaanxi 710048, China |
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| Abstract: |
| We investigated the effects of intercropping system of alfalfa(Ⅰ), cumin(Ⅱ), and suaeda(Ⅲ) with cotton on improving saline-sodic soil with drip irrigation under plastic film.The results showed that the intercropping of halophytes in the saline-sodic cotton fields improved waterholding and slowed salt accumulation in the cotton growth period. The peak soil moisture content maintained in the top 40 cm layer. The intercropping with alfalfa(Ⅰ) and cumin(Ⅱ) improved water holding capacity by 29.80% and 14.49%, respectively, in the top 40 cm zone compared to the control. Intercropping with alfalfa and cumin had considerable effect on reducing salt accumulation in soil with rates of restraining salt of 125% and 70.38%, respectively, in the top 40 cm soil. The growth parameters of cottons such as plant height, stem diameter, and dry matter,with intercropping halophytes were also improved. The cotton yield in the field with alfalfa and cumin also increased by 10.45% and 7.74% compared with control. Thus, intercropping of halophytes in cotton field with drip irrigation under plastic film is an effective measure in improving saline-sodic soil and different halophytes can have different effects. The results of this study concluded that the intercropping cumin and alfalfa with cotton is an effective biological way to improve saline-sodic soil. |
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