|
|
|
| Effects of casing length and emitter flow rate on infiltration characteristics of spring root irrigation |
| LIU Keyao1,2, WU Pute2,3,4, ZHU Delan1,2, CAI Yaohui2,3,4, SONG Xiaolin5, WANG Jianping6 |
| 1. College of Water Resources and Architectural Engineering, Northwest A&F University, Yangling, Shannxi 712100, China; 2. Institute of Water-saving Agriculture in Arid Areas of China, Northwest A&F University, Yangling, Shannxi 712100, China; 3. Institute of Soil and Water Conservation, Northwest A&F University, Yangling, Shannxi 712100, China; 4. Institute of Soil and Water Conservation, CAS & MWR, Yangling, Shannxi 712100, China; 5. College of Horticulture, Northwest A&F University, Yangling, Shannxi 712100, China; 6. Baota District Fruit Industry Technology Promotion and Marketing Service Center, Yan′an, Shannxi 716000, China |
|
|
|
| Guide |
|
|
Abstract In order to determine the suitable application parameters(flow rate and casing length)for root irrigation of apple springs in the Loess Plateau, PP cotton filter element was selected as the supporting casing for indoor soil box tests to explore the influence of the emitter flow rate and the casing length. The test results show that a large emitter flow rate is conducive to the migration of soil moisture in the vertical direction. The larger the flow rate, the greater the volume of the wet body, the range of high-water content areas in the wet body, and the maximum water content at the end of irrigation also increases accordingly after the redistribution of soil water. The accumulated water in the casing can increase the infiltration surface and the infiltration water potential gradient, thereby significantly increa-sing the migration rate of soil moisture. The interaction between the emitter flow rate and the casing length will directly affect the horizontal and vertical migration of soil moisture. When the emitter flow rate is 12 L/h and the casing length is 40 cm, the volume of wet body formed is the largest, and the water distribution in wet body is more uniform, which is the most conducive to the horizontal and vertical movement of soil moisture in the horizontal and vertical directions. This study will provide technical reference for the spring root irrigation technology in Loess Plateau.
|
|
Received: 16 December 2021
|
| Fund: |
|
|
|
|
|
|
