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Analysis of the Response of Kiwifruit to Soil Water Deficit

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DOI: 10.23977/jmcs.2022.010107 | Downloads: 21 | Views: 1182

Author(s)

Yun Wu 1, Jieming Zhu 1

Affiliation(s)

1 College of Water Resources and Civil Engineering, Hunan Agricultural University, No. 1, Nongda Road, Changsha, China

Corresponding Author

Yun Wu

ABSTRACT

Kiwifruit is one of the most successfully commercially cultivated fruit tree species in China and is grown on a large scale and has a pivotal position in the development of the fruit tree industry in China. Seasonal drought is the main disaster weather in southern kiwifruit cultivation, and timely and accurate access to drought information is essential for southern kiwifruit cultivation. We investigated the effects of soil moisture reduction of the morphological and physiological indicators of kiwifruit by using Xu Xiang soft date red kiwifruit cultivars as materials and set up two moisture treatments with adequate water supply and gradual reduction of soil moisture at the end of flowering period to provide scientific basis for the identification and monitoring of kiwifruit drought. The results showed that the physiological indicators started to be affected one after another after a continuous reduction of soil moisture for 3d, and the morphological characters started to receive stress around 9d. The most sensitive kiwifruit physiological indicators were the CO2 stomatal conductance of the first apical leaf and the most sensitive of morphological indicators were the ground diameter. The onset of CO2 stomatal conductance, photosynthetic rate, chlorophyll content, ground diameter and plant height of the first fully expanded leaf of kiwifruit was 3, 4, 7, 9 and 10 d. The water deficits were 8, 11.2, 20.9, 24.1 and 30.6 cm3, respectively, and the corresponding soil relative moisture was 71.17%, 71.09%, 70.87 %, 70.7% and 70.8%, 70.7% and 70.8%, respectively. This indicates that drought in kiwifruit first manifests itself in changes in physiological characteristics and then in morphological characteristics.

KEYWORDS

Kiwifruit, soil water deficit, process analysis, Physio-ecological indicators, thresholds

CITE THIS PAPER

Yun Wu, Jieming Zhu, Analysis of the Response of Kiwifruit to Soil Water Deficit. Journal of Modern Crop Science (2022) Vol. 1: 59-66. DOI: http://dx.doi.org/10.23977/jmcs.2022.010107.

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