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BioMed Research International
Volume 2014, Article ID 931740, 6 pages
http://dx.doi.org/10.1155/2014/931740
Research Article

Biological Effect of Audible Sound Control on Mung Bean (Vigna radiate) Sprout

W. Cai,1 H. He,2 S. Zhu,2 and N. Wang3

1Ningbo Institute of Technology, Zhejiang University, 1 Qianhu South Road, Ningbo, Zhejiang 315100, China
2Key Laboratory of Equipment and Informatization in Environment Controlled Agriculture, Zhejiang University, 866 Yuhangtang Road, Hangzhou, Zhejiang 310058, China
3Department of Biosystems and Agricultural Engineering, Oklahoma State University, 111 Ag Hall, Stillwater, OK 74078, USA

Received 15 May 2014; Revised 20 July 2014; Accepted 20 July 2014; Published 7 August 2014

Academic Editor: Rumiana Koynova

Copyright © 2014 W. Cai et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Audible sound (20–20000 Hz) widely exists in natural world. However, the interaction between audible sound and the growth of plants is usually neglected in biophysics research. Not much effort has been put forth in studying the relation of plant and audible sound. In this work, the effect of audible sound on germination and growth of mung bean (Vigna radiate) was studied under laboratory condition. Audible sound ranging 1000–1500 Hz, 1500–2000 Hz, and 2000–2500 Hz and intensities [80 dB (A), 90 dB (A), 100 dB (A)] were used to stimulate mung bean for 72 hours. The growth of mung bean was evaluated in terms of mean germination time, total length, and total fresh weight. Experimental results indicated that the sound wave can reduce the germination period of mung bean and the mung bean under treatments of sound with intensity around 90 dB and frequency around 2000 Hz and significant increase in growth. Audible sound treatment can promote the growth of mung bean differently for distinct frequency and intensity. The study provides us with a way to understand the effects and rules of sound field on plant growth and a new way to improve the production of mung bean.