| 荒漠绿洲过渡带不同立地沙蒿光合特性研究 |
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| 引用本文： | 王方琳,尉秋实,纪永福,柴成武,张德魁,朱淑娟,杨晓寒,靳承东.荒漠绿洲过渡带不同立地沙蒿光合特性研究[J].西北林学院学报,2021,36(3):68-73. |
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| 作者姓名： | 王方琳 尉秋实 纪永福 柴成武 张德魁 朱淑娟 杨晓寒 靳承东 |
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| 作者单位： | (1.甘肃省治沙研究所，甘肃省荒漠化与风沙灾害防治重点实验室，甘肃 武威 733000；2.甘肃莲花山国家级自然保护区管理局，甘肃 临夏 731500) |
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| 摘 要： | 对巴丹吉林沙漠东南缘民勤西沙窝荒漠绿洲过渡带不同立地条件下沙蒿光合特性进行了研究。结果表明，5种立地类型土壤含水率最大值均为20～40 cm土层，0～60 cm各土层土壤水分含量及总含水率变化趋势均为丘间低地＞平缓沙地＞流动沙丘＞半固定沙丘＞固定沙丘；5种立地类型中沙蒿总叶绿素含量及叶绿素荧光参数变化与水分变化特征均一致；各立地类型中叶片快速光响应曲线中有效量子产量、PSⅡ光化学淬灭系数(qP)均随光强升高而减小，而叶片非光化学淬灭系数NPQ和电子传递速率ETR均随光强升高而增加，中低光强时差异较小，随光强升高差异性逐渐增大，总体表现为丘间低地ETR最大，流动沙丘、平缓沙地及半固定沙丘次之，固定沙丘最小。由此说明，丘间低地上生长的沙蒿具有较强的抗光抑制能力，可产生较高的光化学效率，是最适宜于沙蒿生长的立地类型。
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| 关 键 词： | 荒漠绿洲过渡带 立地类型 土壤水分 光合特性 沙蒿 |
Photosynthetic Characteristics of Artemisia desertorum at Different Sites in Desert-Oasis Ecotone |
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| WANG Fang-lin,YU Qiu-shi,JI Yong-fu,CHAI Cheng-wu,ZHANG De-kui,ZHU Shu-juan,YANG Xiao-han,JIN Cheng-dong. Photosynthetic Characteristics of Artemisia desertorum at Different Sites in Desert-Oasis Ecotone[J].Journal of Northwest Forestry University,2021,36(3):68-73. |
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| Authors: | WANG Fang-lin YU Qiu-shi JI Yong-fu CHAI Cheng-wu ZHANG De-kui ZHU Shu-juan YANG Xiao-han JIN Cheng-dong |
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| Institution: | (1.State Key Laboratory Breeding Base of Desertification and Aeolian Sand Disaster Combating,Gansu Desert Control Research Institute,Wuwei 733000,Gansu,China; 2.Lianhuashan National Nature Reserve Bureau of Gansu,Linxia 731500,Gansu,China) |
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| Abstract: | The photosynthetic characteristics of Artemisia desertorum growing in different site types were studied in the transition zone between Xishawo of Minqin desert and oasis in the southeast edge of Badain Jaran Desert.The maximum soil moisture content was found in 20-40 cm soil layer in all the five site types,the soil moisture contents in different soil layers and total moisture content of 0-60 cm soil layer were in the order of Interdune lowland>gentle sand>mobile sand dune>semi fixed sand dune>fixed dun.The change of total chlorophyll content and chlorophyll fluorescence parameters of A.desertorum were consistent with the change of water content.The effective quantum yield and PSⅡ photochemical quenching coefficient (qP) in the rapid light response curve of the leaves in each site type decreased with the increase of light intensity,while the non photochemical quenching coefficient (NPQ) and electron transfer rate (ETR) of the leaves increased with the increase of light intensity.The difference was small with the condition of the low and medium light,and gradually increased with the rise of light intensity.The ETR in interdune lowland was the largest,mobile sand dune,gentle sand dune and semi fixed sand dune were the second,and the fixed sand dune was the smallest above all.Therefore,A.desertorum growing in interdune lowland has a strong ability of resisting light inhibition and a higher photochemical efficiency,indicating interdune lowland is the most suitable site condition type for A.desertorum growth. |
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| Keywords: | desert-oasis ecotone site type soil moisture photosynthetic characteristics Artemisia desertorum Artemisia desertorum |
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