|Table of Contents|

Root Growth and Cold Resistance of Jujube Tree Under Different Irrigation Methods

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:
2018年18
Page:
1-6
Research Field:
Publishing date:

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Title:
Root Growth and Cold Resistance of Jujube Tree Under Different Irrigation Methods
Author(s):
Li Fayong1;  Yao Baolin1; 3;  Sun Sanmin1; 3;  Liu Weiyang2
（1.College of Water Resources and Architectural Engineering，Tarim University，Aral，Xinjiang 843300;2. College of Plant Science, Tarim University，Aral，Xinjiang 843300;3. Key laboratory of autonomous region for modern agricultural engineering, Tarim University，Aral，Xinjiang 843300）
Keywords:
conventional irrigation;  drip irrigation;  root system;  cold resistance
PACS:
-
DOI:
10.11937/bfyy.20174610
Abstract:
The aim of this study is to provide the theoretical basis for the popularization of drip irrigation technology in dwarfing and planting of jujube in southern Xinjiang. The root growth status and cold resistance of jujube trees under drip irrigation (DI) and conventional irrigation (flood irrigation, FI) were studied by using three-dimensional root excavation method in the desert oasis agriculture area of southern Xinjiang. The results showed that the primary root system, secondary root system and capillary root system of drip jujube were concentrated in shallow soil compared with FI treatment, and the distribution difference of capillary root in each soil layer was less significant than FI. The dry weight of primary, secondary and lateral roots of FI were significantly higher than DI. Compared with the FI treatment, the dry weight of dead root in the 20-40 cm soil layer of DI treatment was 11.17% much higher than 2.30% of FI. Except for 0-10 cm, the total root length and root length density of the first, second lateral roots and capillary roots in soil layers of FI were higher than in those of DI. Compared with conventional irrigation, drip irrigation had a significant effect on the lateral root and capillary root length. Capillary root length density ratio were highest in 0-10 cm soil layer of DI treatment and 20-40 cm soil layer of FI treatment, accounting for 58.02% and 65.55% respectively. The proportion of root length density of secondary lateral root of DI treatment decreased with the depth of soil layer, while FI treatment showed an increasing trend. The vertical distribution of the root system was in accordance with the cubic curve model. The root activity of shallow soil of DI was significantly higher than that of FI. Root cold test showed that: The electrolyte permeate rates of FI was greater than that of DI. The activity of catalase (CAT) in soil layer above 20-40 cm was higher than that of FI. The activity of superoxide dismutase (SOD) in the root system of DI was higher than that of FI. The accumulation rate of sugar in the deep soil roots was higher; however, the soluble sugar content of root treatment in 0～10cm soil layer of DI was significantly larger than that of FI. The content of malondialdehyde (MDA) in root cells treated with DI was lower than that in FI treatment. In summary, the results showed that drip irrigation could cause roots of jujube to float on the surface of soil, and it could seriously reduce the root biomass, but on the other hand, it could significantly improve the cold resistance of jujube root.

References:

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Last Update: 2018-08-14