| An analysis on soil moisture availability and dryness of jujube forest in River Terrace of Jinshaan Valley |
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| DOI：10.7606/j.issn.1000-7601.2020.05.33 |
| Key Words: jujube water availability soil desication river terrace Jinshaan Valley |
| Author Name | Affiliation | | CHAO Jinlong | Taiyuan Normal University,Jinzhong, Shanxi 030600, China | | HU Lei | Taiyuan Normal University,Jinzhong, Shanxi 030600, China | | LEI Tianjie | China Institute of Water Resources and Hydropower Research, Beijing 100038, China | | ZHANG Pengfei | Taiyuan Normal University,Jinzhong, Shanxi 030600, China | | HAO Xiaomei | Taiyuan Normal University,Jinzhong, Shanxi 030600, China | | ZHAO Deyi | Taiyuan Normal University,Jinzhong, Shanxi 030600, China |
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| Abstract: |
| The soil of jujube forest on river terraces in Jinshaan Valley was selected as the research object. The soil water availability index (Aw) and the soil drying intensity evaluation method (SDI) were used to quantitatively study the soil water availability and spatial drying difference of 0~500 cm river terrace. The results showed that, there was a significant difference in soil water availability between different terraces (P<0.05). The first terrace (0.36) had significantly higher Aw than the second terrace (0.08) and the third terrace (0.14) did. The significant difference of soil water availability in different depths was: in 0~200 cm soil except 60~100 cm, the first terrace of each layer was significantly higher than the second and third terrace (P<0.05); the lowest (maximum value: -0.06) and the highest (maximum value:1.04) water status of the first terrace were shown in 110~300 cm and 310~500 cm, respectively (P<0.05). For the classification of soil water availability, the first terrace was mostly in the state of invalid water and surplus water, and the second and third terraces were mostly in the state of less available water. The average drying strength of 200~500 cm soil was as third terrace (69.87%) >second terrace (69.23%) > first terrace (-24.78%). Considering the soil moisture index and the law of vegetation growth, this paper holds that the jujube trees grew more easily in the third terrace of the river, while the first and second terraces needed to strengthen irrigation management and increase agronomic measures to suit the normal growth and development of jujube. |
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