Water Status Indices of Young Apple Tree Respond to Water Stress under the Environment Sheltered from Rain. | [International Journal of Agriculture and Biology • 2018]

Author(s):

1. Sun Ying: State Key Laboratory of Crop Biology, National Research Center of Apple Engineering and Technology, College of Horticultural Science and Engineering, Shandong Agricultural University, Taian, Shandong Province, 271018, China; College of Science and Information, Qingdao Agricultural University, Qingdao, Shandong Province, 266109, China

2. Guan Qiuzhu: State Key Laboratory of Crop Biology, National Research Center of Apple Engineering and Technology, College of Horticultural Science and Engineering, Shandong Agricultural University, Taian, Shandong Province, 271018, China: Shandong Institute of Pomology, Taian, Shandong Province, 271000, China

3. Nie Peixian: Shandong Institute of Pomology, Taian, Shandong Province, 271000, China

4. Jiang Yuanmao: State Key Laboratory of Crop Biology, National Research Center of Apple Engineering and Technology, College of Horticultural Science and Engineering, Shandong Agricultural University, Taian, Shandong Province, 271018, China

5. Zhang Jinchun: State Key Laboratory of Crop Biology, National Research Center of Apple Engineering and Technology, College of Horticultural Science and Engineering, Shandong Agricultural University, Taian, Shandong Province, 271018, China

6. Zhao Xiaoqi: State Key Laboratory of Crop Biology, National Research Center of Apple Engineering and Technology, College of Horticultural Science and Engineering, Shandong Agricultural University, Taian, Shandong Province, 271018, China

7. Yang Jinduo: Shangdong Jinduo Agricultural Science and Technology Co. Ltd, Juye, Shandong Province, 274900, China

8. Zhang Jixiang: State Key Laboratory of Crop Biology, National Research Center of Apple Engineering and Technology, College of Horticultural Science and Engineering, Shandong Agricultural University, Taian, Shandong Province, 271018, China

Abstract:

The main aim was to provide theoretical support for scientific regulation of the water and precision irrigation in orchards. This study focused on the water status indices of trees to soil water stress, and their relationship to water balance of the tree body. The results showed that stem maximum daily shrinkage (MDS) was the most sensitive to soil water stress, followed by midday stem water potential (?stem). MDS also had obvious response to reference evapotranspiration (ET0, R = 0.6759, P < 0.01, N = 62). The y stem was also sensitive to soil water stress and atmosphere water status, which was negatively correlated to ET0 (R = -0.47071, P < 0.05, N = 30). Relative MDSr and relative soil water potential (?rsoil) was highly correlated (R = 0.6582, P <0.01, N = 30); and correlation between relative midday stem potential (ψrstem) and ψrsoil was very significant (R = 0.6143, P < 0.01, N = 30). Moreover, MDS was measured in succession and recorded automatically, but so far it has been difficult automatically to measure either leaf or stem potential. The other tree water status indices like predawn water potential ( ψpd), daily growth of stem diameter (DG), stomatal conductance (gs), had different response to water stress. But, in general, their response was not very sensitive to change in soil water potential. In conclusion, MDS is an optimal tool to aid for irrigation in orchards, followed by ψstem.

Page(s): 1137-1144

DOI: 10.17957/IJAB/15.0624

Published: Journal: International Journal of Agriculture and Biology, Volume: 20, Issue: 5, Year: 2018

Keywords:

Keywords are not available for this article.

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