Suitable indicators using stem diameter variation-derived indices to monitor the water status of greenhouse tomato plants

Zhaojiang Meng, Aiwang Duan, Deli Chen, Kithsiri Bandara Dassanayake, Xiaosen Wang, Zugui Liu, Hao Liu and Shengguo Gao

PLOS ONE, 2017, vol. 12, issue 2, 1-15

Abstract: It is very important to seek a simple nondestructive method to continuously measure plant water status for irrigation scheduling. Changes in stem diameter in response to plant water status and soil water content (SWC) were experimentally investigated during the growing seasons of 2011/2012 and 2012/2013 in pot-cultivated tomato (Lycopersicon esculentum L.) plants in a plastic greenhouse. This study was conducted to determine suitable SDV (stem diameter variation)-derived indices as indicators of tomato plant water status for irrigation scheduling. The experiment was designed as a two-factor randomized block using the SWC and growth stages as variables. The SWC was controlled at 70–80% (well-watered), 60–70% (slightly deficit watered), 50–60% (moderately deficit watered) of the field capacity (FC), and the prescribed growing stages were vegetative, flowering and fruit-forming, and harvesting stages. Regression analysis showed that the SD6 (the difference between the stem diameter value at 06:00 am and the initial sensor reading) was closely related to the SWC (p

Date: 2017
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Persistent link: https://EconPapers.repec.org/RePEc:plo:pone00:0171423

DOI: 10.1371/journal.pone.0171423

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