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Experimental Research on Photosynthetic and Acoustic Emission Characteristics for Tomato Under Different Water Supply Tension(PDF)

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:
2017年20
Page:
93-99
Research Field:
Publishing date:

Info

Title:
Experimental Research on Photosynthetic and Acoustic Emission Characteristics for Tomato Under Different Water Supply Tension
Author(s):
WEI Ruxue1; 2; YU Ligen2; GUO Wenzhong1; 2; XUE Xuzhang2; YUE Huanfang3; HU Xiaoyi3
1.Plant Science and Technology College,Beijing University of Agriculture,Beijing 102206；2.National Research Center of Intelligent Equipment for Agriculture,Beijing 100097；3.Beijing Agriculture Technology Extension Station,Beijing 100029
Keywords:
tomato; negative pressure water control; transpiration rate; acoustic emission; irrigation
PACS:
-
DOI:
10.11937/bfyy.20165065
Abstract:
‘Deanna’ tomato was used as material,using the negative pressure water supplying and controlling pot device,the water supply tension was set at 15 hPa,35 hPa,55 hPa and 75 hPa,respectively,and the soil water content was controlled continuously.Using the acoustic emission monitoring system to acquire acoustic emission signals,to mearsure the net photosynthetic rate (Pn) and transpiration rate (Tr) of tomato leaves,and air temperature,relative humidity and light intensity to study the relationship between the acoustic emission count and the net photosynthetic rate and transpiration rate of the tomato.The results showed that the smaller water supply tension,the net photosynthetic rate and transpiration rate increased gradually and the leaf temperature decreased gradually.The change of transpiration rate and net photosynthetic rate were consistent.The characteristics of AE signal were analyzed within 10 hours from 08：00 to 18：00 and the changes of AE characteristics and tomato photosynthetic characteristics were counted every two hours,then it was found that there was a good agreement.Among them,the net photosynthetic rate and transpiration rate reached the maximum value between 12:00 and 14:00,the acoustic emission count of tomato under water supply tension of 55 hPa and 75 hPa reached the maximum,were 34 and 15 respectively.In conclusion,the photosynthetic characteristics and the acoustic emission characteristics of tomato under different water supply tension were significantly different,and there was a good linear relationship between them.The further experimental results showed that it could provide a basis for the formulation of irrigation strategies.

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Last Update: 2017-11-01