| Spatial variation of soil evaporation in mountain apple orchards under drip irrigation and mulching |
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| DOI：10.7606/j.issn.1000-7601.2023.06.23 |
| Key Words: drip irrigation fabric mulching soil evaporation spatial distribution |
| Author Name | Affiliation | | LI Huangtao | Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas of Ministry of Education, Northwest A＆F University, Yangling, Shaanxi 712100, China | | CAO Hongxia | Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas of Ministry of Education, Northwest A＆F University, Yangling, Shaanxi 712100, China | | YANG Shiyu | Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas of Ministry of Education, Northwest A＆F University, Yangling, Shaanxi 712100, China | | ZHANG Yi | Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas of Ministry of Education, Northwest A＆F University, Yangling, Shaanxi 712100, China | | PEI Shuyao | Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas of Ministry of Education, Northwest A＆F University, Yangling, Shaanxi 712100, China | | NAN Xueping | Shaanxi Fruit Technology Group Co. Ltd., Yangling, Shaanxi 712100, China | | LI Zhijun | Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas of Ministry of Education, Northwest A＆F University, Yangling, Shaanxi 712100, China |
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| Abstract: |
| Reducing soil evaporation is an important way to improve water use efficiency in orchards, and mulching is an effective method to reduce soil evaporation. This research aimed at the apple tree on the loess plateau, studied the spatial distribution of soil evaporation during four wet\|dry cycles in apple orchard. This experiment set three irrigation levels (high water, medium water and low water), two mulching methods (fabric\|mulching and non\|mulching) and three points based on the distance to drip line in horizontal direction in each treatment to examine the spatial variation of soil evaporation under different irrigation amount and mulching. The correlation between space point, meteorological factor, soil water and soil evaporation were also studied. Under high\|water and medium\|water treatments, soil evaporation presented a ‘single\|peak’ spatial distribution curve, while under low\|water treatment, there was non\|significant difference in soil evaporation at the three horizontal points. Soil evaporation was effectively inhibited by fabric\|mulching. At the medium water, the soil moisture at the point 60 cm away from the tree line was significantly increased and the soil evaporation was reduced by 5.26%~27.75%. The partial correlation analysis showed that the influence of point and environmental factors on soil evaporation was weakened and the influence of soil moisture on soil evaporation was increased. Recommending combination of mulching and irrigation is fabric mulching and medium water. |
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