Effects of Burial Furrow Parameters on Soil Water Movement under Subsurface Stalk Composite Pipe Irrigation

Feng Wu, Xuefang Feng, Xuemei Liu (), Di Wu, Songmei Zai () and Linbao Liu
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Feng Wu: College of Water Resources, North China University of Water Resources and Electric Power, Zhengzhou 450046, China
Xuefang Feng: Henan Key Laboratory of Water-Saving Agriculture, Zhengzhou 450046, China
Xuemei Liu: College of Information Engineering, North China University of Water Resources and Electric Power, Zhengzhou 450046, China
Di Wu: College of Information Engineering, North China University of Water Resources and Electric Power, Zhengzhou 450046, China
Songmei Zai: Henan Key Laboratory of Water-Saving Agriculture, Zhengzhou 450046, China
Linbao Liu: Henan Key Laboratory of Water-Saving Agriculture, Zhengzhou 450046, China

Agriculture, 2024, vol. 14, issue 2, 1-17

Abstract: Stalk composite pipe (SCP), a novel product used for subsurface irrigation, is primarily composed of crop stalks, soil, and water. In subsurface SCP irrigation (SSI), comprehending the effects of burial furrow parameters on soil water movement is critical. However, the precise effects are not known. Here, we aimed to assess the effects of varying burial furrow dimensions, including widths of 15, 20, and 25 cm, depths of 10, 15, and 20 cm, and backfilling-soil bulk densities of 1.1, 1.2, and 1.3 g cm −3 , on wetted distance and soil water movement. We conducted an indoor soil bin experiment and numerical simulation using HYDRUS-2D in 2020–2021 in Zhengzhou City, Northern China. Wider burial furrows resulted in increased wetted distance and soil water content, ultimately leading to greater effect in a horizontal direction. In the horizontal profile, the average soil water content of the SSI treatments, which used burial furrow widths of 15, 20, and 25 cm, were 1.121, 1.230, and 1.280 times higher, respectively, than those of CK. The burial furrow depth had minimal effect on the wetted distance, whereas adjusting the burial furrow depth primarily affected the saturation depth. The speed of wetting-front migration was affected by the backfilling-soil bulk density. For a given soil and crop, it is advisable to determine first the burial furrow width and backfilling-soil bulk density. Subsequently, the burial furrow depth should be established based on the distribution of the crop’s roots. Our findings offer a scientific basis for using SSI.

Keywords: stalk composite pipe; burial furrow parameters; wetted distance; soil water movement; subsurface SCP irrigation (search for similar items in EconPapers)
JEL-codes: Q1 Q10 Q11 Q12 Q13 Q14 Q15 Q16 Q17 Q18 (search for similar items in EconPapers)
Date: 2024
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