| Effects of irrigation gradients and film mulching combinations on evapotranspiration in drip\|irrigated cotton field |
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| DOI：10.7606/j.issn.1000-7601.2024.06.18 |
| Key Words: cotton drip irrigation mulching evapotranspiration soil moisture soil temperature |
| Author Name | Affiliation | | LIU Chengyue | College of Water Conservancy & Architectural Engineering, Shihezi University, Shihezi, Xinjiang 832003, China
Key Laboratory of Cold and Arid Regions Eco\|Hydraulic Engineering of Xinjiang Production & Construction Corps, Shihezi, Xinjiang 832003, China | | YANG Guang | College of Water Conservancy & Architectural Engineering, Shihezi University, Shihezi, Xinjiang 832003, China
Key Laboratory of Cold and Arid Regions Eco\|Hydraulic Engineering of Xinjiang Production & Construction Corps, Shihezi, Xinjiang 832003, China | | GUO Minghua | Water Conservancy Project Management and Service Center of Shihezi，Shihezi，Xinjiang 832000， China | | JIA Weikang | Water Conservancy Project Management and Service Center of Shihezi，Shihezi，Xinjiang 832000， China | | KONG Chunxian | College of Water Conservancy & Architectural Engineering, Shihezi University, Shihezi, Xinjiang 832003, China
Key Laboratory of Cold and Arid Regions Eco\|Hydraulic Engineering of Xinjiang Production & Construction Corps, Shihezi, Xinjiang 832003, China | | WANG Chunxia | College of Water Conservancy & Architectural Engineering, Shihezi University, Shihezi, Xinjiang 832003, China
Key Laboratory of Cold and Arid Regions Eco\|Hydraulic Engineering of Xinjiang Production & Construction Corps, Shihezi, Xinjiang 832003, China | | HE Xinlin | College of Water Conservancy & Architectural Engineering, Shihezi University, Shihezi, Xinjiang 832003, China
Key Laboratory of Cold and Arid Regions Eco\|Hydraulic Engineering of Xinjiang Production & Construction Corps, Shihezi, Xinjiang 832003, China | | ZHANG Shuo | College of Water Conservancy & Architectural Engineering, Shihezi University, Shihezi, Xinjiang 832003, China
Key Laboratory of Cold and Arid Regions Eco\|Hydraulic Engineering of Xinjiang Production & Construction Corps, Shihezi, Xinjiang 832003, China | | ZHAO Li | College of Water Conservancy & Architectural Engineering, Shihezi University, Shihezi, Xinjiang 832003, China
Key Laboratory of Cold and Arid Regions Eco\|Hydraulic Engineering of Xinjiang Production & Construction Corps, Shihezi, Xinjiang 832003, China | | LI Pengfei | College of Water Conservancy & Architectural Engineering, Shihezi University, Shihezi, Xinjiang 832003, China
Key Laboratory of Cold and Arid Regions Eco\|Hydraulic Engineering of Xinjiang Production & Construction Corps, Shihezi, Xinjiang 832003, China | | PU Shenghai | Research Institute of Soil, Fertilizer and Agricultural Water Conversation, Xinjiang Academy of Agricultural Sciences/Key Laboratory of Agro\|Environment in Northwest Oasis, Ministry of Agriculture and Rural Affairs, Urumqi， Xinjiang 830091, China |
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| Abstract: |
| To examine the effects of plastic film coverage and irrigation on evapotranspiration as well as water and heat conditions in cotton fields, pit and barrel planting experiments were conducted. The experiments involved three irrigation levels: 3 360 m3·hm-2 (W1), 4 200 m3·hm-2 (W2), and 5 040 m3·hm-2 (W3), along with two plastic film covering methods: covered with film (P1) and bare soil (P2). The evapotranspiration pattern and soil water and heat status of drip irrigated cotton fields were analyzed. The results showed that: (1) Plastic film mulching effectively reduced the total evapotranspiration of cotton throughout the entire growth period. Under W1, W2, and W3 irrigation levels, the plastic film mulching treatment reduced cotton evapotranspiration by 25.31%, 25.39%, and 25.75%, respectively. The irrigation amount was positively correlated with evapotranspiration. Under P1 mode, the cotton evapotranspiration of W3 treatment increased by 8.71% and 7.50% compared to W1 and W2 treatments, respectively. Under P2 mode, the cotton evapotranspiration of W3 treatment increased by 8.82% and 8.02%, respectively. (2) Film mulching had a considerable impact on the soil temperature and moisture content of the cotton fields, leading to an increase in soil temperature and moisture content. However, the impact of film mulching on soil water and thermal conditions diminished as soil depth increased. Additionally, there was a negative correlation between soil temperature and irrigation amount, and a positive correlation between soil moisture content and irrigation amount. (3) Soil moisture content was found to have the greatest influence on the correlation coefficient of cotton evapotranspiration in the bare soil treatment, and it decreased with increasing soil depth. On the other hand, the correlation coefficient of soil temperature on cotton evapotranspiration increased with soil depth. It is worth noting that the P1 treatment had the highest correlation coefficient in the 20 cm soil layer, while the P2 treatment had the highest correlation coefficient in the 25 cm soil layer. Exploring the impact of film mulching and drip irrigation on the evapotranspiration process of farmland under water\|saving conditions in arid regions is of great theoretical significance. This research helps in understanding the hydrological cycle and stability mechanisms of oases. Additionally, it provides valuable scientific insights for optimizing and utilizing limited water resources in arid areas. |
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