| 胡海英,梁新华,伏晓昭,王兴,谢应忠.宁夏种植甘草δ13C组成与水分利用的关系[J].干旱地区农业研究,2018,36(6):86~91 |
| 宁夏种植甘草δ13C组成与水分利用的关系 |
| 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 |
| 中文关键词: 乌拉尔甘草 δ13C值 土壤水分 水分利用效率 |
| 英文关键词:Glycyrrhiza uralensis δ13C value soil moisture water use efficiency |
| 基金项目:宁夏自然科学基金项目（NZ16014） |
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| 中文摘要: |
| 以宁夏盐池退耕还草地人工种植乌拉尔甘草（以下统称甘草）为研究对象，比较研究了甘草叶片的δ13C组成、叶片相对含水量、脯氨酸含量、叶绿素含量等指标及其相互关系。结果表明：(1）自然降水条件下不同处理土壤含水量显著低于灌溉条件下的土壤含水量(P<0.05)，甘草叶片的δ13C值、水分利用效率、叶片相对含水量显著大于灌溉条件下的相应值(P<0.05)，脯氨酸含量和叶绿素含量则呈相反变化趋势；(2）野生甘草与自然降水条件下种植甘草之间的生境土壤含水量、δ13C值及水分利用效率无显著差异，与灌溉条件下种植甘草之间的各项指标差异显著；(3)同一水分条件下2 a生和3 a生甘草之间的脯氨酸含量和叶绿素含量差异显著(P<0.05)，其他指标差异不显著；(4）甘草叶片δ13C 值与土壤含水量、脯氨酸含量、叶绿素含量呈显著负相关，与叶片相对含水量呈显著正相关。综上可知，甘草叶片δ13C 值可同时反映甘草植株和土壤的水分状况。自然降水条件下，人工种植甘草与野生甘草一样具有高的δ13C 值和水分利用效率，在研究区，甘草可在无灌溉条件地区大面积种植。 |
| 英文摘要: |
| 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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