| The relationship between δ13C value and water utilization of cultivated liquorice (Glycyrrhiza uralensis) in Ningxia |
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| DOI：10.7606/j.issn.1000-7601.2018.06.13 |
| Key Words: Glycyrrhiza uralensis δ13C value soil moisture water use efficiency |
| Author Name | Affiliation | | HU Hai-ying | College of Agriculture, Ningxia University, Yinchuan， Ningxia 750021, China | | LIANG Xin-hua | College of Life Science, Ningxia University, Yinchuan， Ningxia 750021, China | | FU Xiao-zhao | College of Agriculture, Ningxia University, Yinchuan， Ningxia 750021, China | | WANG Xing | Incubation Base of State Key Laboratory of Land Degradation and Ecological Restoration in Northwest China, Ningxia University, Yinchuan, Ningxia 750021, China | | XIE Ying-zhong | College of Agriculture, Ningxia University, Yinchuan， Ningxia 750021, China |
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| Abstract: |
| This study investigated the relationship between leaf δ13C value, relative water content, proline and chlorophyll content of cultivated liquorice (G. uralensis) under various water situations in Yanchi County, Ningxia. The results showed that: (1) Soil water content in all soil layers under irrigation was significantly higher than that under natural rainfall condition (P<0.05). Also, leaf δ13C value, water use efficiency, and relative water content were significantly higher than that under irrigation, however, proline and chlorophyll content showed reverse results; (2) There was no significant difference in soil water content, δ13C value, and water-use efficiency between wild liquorice and cultivated ones under non-irrigation conditions, but significant difference between wild liquorice and irrigated ones; (3) Under the same water conditions, there was significant difference in proline and chlorophyll contents between 2 a and 3 a of liquorice but not in other indexes; (4) The leaf δ13C value was negatively correlated with soil moisture content, proline and chlorophyll contents, but positively correlated with relative leaf water content. In conclusion, the leaf δ13C value can reflect the water status of both plants and the soil it grows in. Like wild liquorice, cultivated ones have higher δ13C value and water-use efficiency to adapt to the natural conditions. Therefore, liquorice can be planted on a large scale without irrigation conditions in the study area. |
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