Study on Plant Growth and Nutrient Uptake under Different Aeration Intensity in Hydroponics with the Application of Particle Image Velocimetry

Bateer Baiyin, Kotaro Tagawa, Mina Yamada, Xinyan Wang, Satoshi Yamada, Sadahiro Yamamoto and Yasuomi Ibaraki
Additional contact information
Bateer Baiyin: United Graduate School of Agricultural Sciences, Tottori University, Tottori 680-8550, Japan
Kotaro Tagawa: Faculty of Agriculture, Tottori University, Tottori 680-8553, Japan
Mina Yamada: Faculty of Agriculture, Tottori University, Tottori 680-8553, Japan
Xinyan Wang: Graduate School of Sustainability Science, Tottori University, Tottori 680-8550, Japan
Satoshi Yamada: Faculty of Agriculture, Tottori University, Tottori 680-8553, Japan
Sadahiro Yamamoto: Faculty of Agriculture, Tottori University, Tottori 680-8553, Japan
Yasuomi Ibaraki: Faculty of Agriculture, Yamaguchi University, Yamaguchi 753-8515, Japan

Agriculture, 2021, vol. 11, issue 11, 1-15

Abstract: Aeration is considered beneficial for hydroponics. However, little information is available on the effects of aeration, and even less on solutions that use bubble flow and their agronomic effects. In this study, the effects of aeration intensity on plants were studied through cultivation experiments and flow field visualization. It was found that the growth of plants did not increase linearly with an increase in aeration intensity. From the results of this study, when the aeration intensity was within the low range (0.07–0.15 L·L −1 NS·min −1 ), increasing the aeration intensity increased the plant growth. However, after the aeration intensity reached a certain extent (0.15–1.18 L·L −1 NS·min −1 ), some indicators did not change significantly. When the aeration intensity continued to increase (1.18–2.35 L·L −1 NS·min −1 ), growth began to decrease. These results show that for increasing dissolved oxygen and promoting plant growth, the rule is not “the higher the aeration intensity, the better”. There is a reasonable range of aeration intensity within which crops grow normally and rapidly. In addition, increasing the aeration intensity means increasing energy utilization and operating costs. In actual hydroponics production, it is very important to find a reasonable aeration intensity range.

Keywords: bubble flow; dissolved oxygen; root morphology; aeration rate; image analysis technology; dryland agriculture (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: 2021
References: View complete reference list from CitEc
Citations:

Downloads: (external link)
https://www.mdpi.com/2077-0472/11/11/1140/pdf (application/pdf)
https://www.mdpi.com/2077-0472/11/11/1140/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jagris:v:11:y:2021:i:11:p:1140-:d:678989

Access Statistics for this article

Agriculture is currently edited by Ms. Leda Xuan

More articles in Agriculture from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().