干旱区研究

干旱区研究 ›› 2015, Vol. 32 ›› Issue (2): 235-239.doi: 10.13866/j.azr.2015.02.04

• 水土资源 • 上一篇    下一篇

种植枸杞对次生盐渍化土壤活性有机碳和碳库管理指数的影响

李银科, 马全林, 王耀琳, 孙涛, 靳虎甲, 宋德伟, 杜娟   

  1. 甘肃省荒漠化与风沙灾害防治重点实验室,省部共建国家重点实验室培育基地,甘肃省治沙研究所,甘肃 兰州 730070
  • 收稿日期:2013-07-18 修回日期:2013-10-15 出版日期:2015-03-15 发布日期:2015-04-16
  • 作者简介:李银科(1982-),男,硕士,助理研究员,主要从事荒漠化防治方面的研究工作. E-mail: lyk819@163.com
  • 基金资助:
    甘肃省青年科学基金项目(1208RJYA067,1208RJYA093);全球环境基金项目(GEF/53-4280);甘肃省省属科研院所科技创新团队(1207TTCA002)

Effects of Medlar Planting on Active Organic Carbon and Carbon Pool Management Index in Secondary Salinized Soil

LI Yin-ke, MA Quan-lin, WANG Yao-lin, SUN Tao, JIN Hu-jia, SONG De-wei, DU Juan   

  1. State Key Laboratory of Desertification and Aeolian Sand Disaster Combating, Gansu Desert Control Research Institute, Lanzhou 730070, Gansu, China
  • Received:2013-07-18 Revised:2013-10-15 Published:2015-03-15 Online:2015-04-16

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摘要： 以次生盐渍化弃耕地为对照,研究种植枸杞对次生盐渍化土壤有机碳、活性有机碳、非活性有机碳及碳库管理指数的影响。结果表明:与弃耕地相比,4 a、7 a、11 a枸杞地0~100 cm土壤有机碳分别增加41.6%、46.5%、51.1%,活性有机碳分别增加57.1%、57.9%、54.4%,非活性有机碳分别增加24.0%、33.2%、47.3%,增加量在0~10 cm和60~80 cm土层最为明显;次生盐渍化土地种植枸杞后碳库活度和碳库活度指数有所增加,碳库指数和碳库管理指数明显增加,土壤质量得到改善。土壤总有机碳、活性有机碳、非活性有机碳和碳库指数与土壤肥力提高、含盐量和pH的降低密切相关,可作为表征次生盐渍化土壤质量改善的指标。

关键词: 枸杞, 次生盐渍化, 活性有机碳, 碳库管理指数

Abstract: This study explored effects of medlar planting on contents of total organic carbon (TOC), active organic carbon (AOC), non active organic carbon (NAOC), and carbon pool management index (CPMI) in secondary salinized soil and compared those contents against what in abandoned salinized agricultural land. The result showed that the contents of TOC, AOC, and NAOC increased by 41.6%, 46.5% and 51.1%; 57.1%, 57.9%, and 54.4%; and 24.0% and 33.2%, 47.3%, respectively in the soil depth of 0-100 cm after medlar planting for 4, 7 and 11 years. The largest increases appeared at the soil depths of 0-10 cm and 60-80 cm. Carbon pool activity and carbon pool activity index had a little increase, carbon pool index (CPI) and CPMI were significantly increased after medlar planting in secondary salinized soil. The soil quality was improved effectively. Correlation analysis showed that the soil fertility improvement and the decrease of soil salinization were closely related to TOC, AOC, NAOC and CPI. The four indices could be used as the indicators to reflect the soil quality improvement of secondary salinized soil.

Key words: medlar, secondary salinized soil, active organic carbon, carbon pool management index