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Experimental and Numerical Analysis of Drip Tape Layout for Irrigation of Sugarcane in Latosol



Kai Huang1, 2, *, Desuo Cai1, Jinchuang Jinchuang2, Wei Pan2
1 College of Civil Engineering and Architecture, Guangxi University, Nanning 530004, China
2 Guangxi Institute of Hydraulic Research, Nanning 530023, Chin


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Creative Commons License
© 2015 Huang et al.

open-access license: This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International Public License (CC-BY 4.0), a copy of which is available at: (https://creativecommons.org/licenses/by/4.0/legalcode). This license permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

* Address correspondence to this author at the Guangxi University, Nanning 530004, China; Tel: +86-771 2185896; Fax: +86-771 2185010; E-mail: gxhuangkai@126.com


Abstract

A laboratory soil column experiment was first conducted to analyze water movement in latosol of sugarcane field under drip irrigation from single-point source at different emitter discharge rates. Next, a mathematical model of soil water movement under drip irrigation from single-point source was built using Hydrus-3D, which could accurately simulate the shape of the wetted soil volume and the distribution of volumetric water content in the experiment. Further, a Hydrus- 3D model of soil water movement under drip irrigation from double-point source was built and then used to analyze the effects of critical parameters on irrigation uniformity. Results showed that emitter spacing affected irrigation uniformity greatly, but emitter discharge rate did not. According to the irrigation uniformity, project cost and operational management patterns, appropriate drip tape parameters for irrigation of sugarcane in latosol were determined: emitter discharge rate 1.38 L/h, emitter spacing 30 cm, and single-emitter irrigation volume 9.0 L.

Keywords: Drip tape, hydrus-3D, latosol, sugarcane field.



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