| Soil water and salt distribution and cotton growth under film drip irrigation with different water salinity in cotton field |
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| DOI：10.7606/j.issn.1000-7601.2022.03.12 |
| Key Words: (slight) saline water salinity water and salt distribution cotton growth arid area |
| Author Name | Affiliation | | LI Wanjing | School of Water Conservancy and Construction Engineering/Key Laboratory of Xinjiang Production and Construction Crops for Ecological and Water Conservancy Engineering in the Cold and Drought Area, Shihezi University, Shihezi, Xinjiang 832003, China | | YANG Guang | School of Water Conservancy and Construction Engineering/Key Laboratory of Xinjiang Production and Construction Crops for Ecological and Water Conservancy Engineering in the Cold and Drought Area, Shihezi University, Shihezi, Xinjiang 832003, China | | LEI Jie | School of Water Conservancy and Construction Engineering/Key Laboratory of Xinjiang Production and Construction Crops for Ecological and Water Conservancy Engineering in the Cold and Drought Area, Shihezi University, Shihezi, Xinjiang 832003, China | | WANG Chunxia | School of Water Conservancy and Construction Engineering/Key Laboratory of Xinjiang Production and Construction Crops for Ecological and Water Conservancy Engineering in the Cold and Drought Area, Shihezi University, Shihezi, Xinjiang 832003, China | | HE Xinlin | School of Water Conservancy and Construction Engineering/Key Laboratory of Xinjiang Production and Construction Crops for Ecological and Water Conservancy Engineering in the Cold and Drought Area, Shihezi University, Shihezi, Xinjiang 832003, China | | LI Yi | College of Water Resources and Architecture Engineering，Northwest A&F University, Yangling, Shaanxi 712100, China | | GONG Ping | School of Water Conservancy and Construction Engineering/Key Laboratory of Xinjiang Production and Construction Crops for Ecological and Water Conservancy Engineering in the Cold and Drought Area, Shihezi University, Shihezi, Xinjiang 832003, China | | QIAO Changlu | School of Water Conservancy and Construction Engineering/Key Laboratory of Xinjiang Production and Construction Crops for Ecological and Water Conservancy Engineering in the Cold and Drought Area, Shihezi University, Shihezi, Xinjiang 832003, China | | PU Shenghai | Institute of Soil Fertilizer and Agricultural Water Saving, Xinjiang Academy of Agricultural Sciences, Urumqi, Xinjiang 830000, China |
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| Abstract: |
| The application of (slight) saline water resources in agricultural irrigation is a key way to alleviate the shortage of freshwater resources in arid and semi-arid areas. Irrigation of cotton fields with appropriate salinity water can effectively increase crop yield and will not aggravate soil salinization in the short term. To explore the effects of drip irrigation under film with different salinity on soil water and salt transport and cotton growth, a pit test was carried out from 2018 to 2020. Six irrigation water source scenarios with different salinity were set: 1, 2, 3, 4, 5 g·L-1 and 6 g·L-1. The changes of soil water and salt, eight ions, hydrochemical types and cotton growth characteristics were analyzed. The results showed that: (1) The soil moisture content under (slight) saline water irrigation reached the peak at the flowering and bolling stage, and the soil moisture content under 5 g·L-1 and 6 g·L-1 treatment was significantly higher than that of other treatments. The soil moisture content of each treatment reached the peak at 60 cm soil layer 12 h after irrigation in the narrow row, and the average peak value of soil moisture content of each treatment was 20.61%. Soil salinity increased with the postponement of cotton growth period and increasing salinity of irrigation water, and it increased year by year. (2) The ion content increased with the increase of salinity of irrigation water. Under (slight) saline water irrigation, the salt of each treatment was washed to 60~100 cm soil layer by drip irrigation. The hydrochemical type of soil solution was mainly Cl·SO4-Na·Ca. (3) When the salinity of irrigation water was > 4 g·L-1, the plant height, stem diameter, leaf area and chlorophyll content of cotton were inhibited in various degrees. Of which the yield of 4 g·L-1 treatment was 0.02% higher than that of freshwater treatment. The soil salt accumulation under water source irrigation ≤ 4 g·L-1 was slower, so it was a suitable irrigation water source. |
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