地理研究 ›› 2013, Vol. 32 ›› Issue (2): 214-222.doi: 10.11821/yj2013020002

• 土地利用与生态环境 • 上一篇    下一篇

大气CO2浓度升高和施氮对棉田土壤理化性质及微生物区系的影响

尹飞虎1, 高志建2, 谢宗铭3, 刘长勇4, 李晓兰2, 李全胜3, 刘瑜2   

  1. 1. 新疆农垦科学院, 石河子 832000;
    2. 新疆农垦科学院农田水利与土壤肥料研究所, 石河子 832000;
    3. 新疆农垦科学院分子农业技术育种中心, 石河子 832000;
    4. 新疆农垦科学院分析测试中心, 石河子 832000
  • 收稿日期:2012-06-13 修回日期:2012-10-04 出版日期:2013-02-10 发布日期:2013-02-10
  • 作者简介:尹飞虎(1954- ),男,湖南平江人,研究员,博士生导师,主要从事植物营养方面的研究。E-mail;nkyyfh@sohu.com
  • 基金资助:

    国家自然科学基金项目(40973061);公益性行业农业科研专项(20120312);“十一五”国家“863”重大专项(2006AA100218);新疆兵团重大科技攻关项目(GKB00NKYGJ12NY)

Influence of elevated CO2 and nitrogen supply on cotton field soil properties and microbial flora

YIN Feihu1, GAO Zhijian2, XIE Zongming3, LIU Changyong4, LI Xiaolan2, LI Quansheng3, LIU Yu2   

  1. 1. Xinjiang Academy of Agricultural and Reclamation Science, Shihezi 832000, Xinjiang, China;
    2. Institute of Field Water Conservancy, Soil and Fertilizer Research, Xinjiang Academy of Agricultural and Reclamation Science, Shihezi 832000, Xinjiang, China;
    3. Center for Molecular Agrobiotechnology and Breeding, Xinjiang Academy of Agricultural and Reclamation Science, Shihezi 832000, Xinjiang, China;
    4. Center forFood Quality Supervision and Inspection, Xinjiang Academy of Agricultural and Reclamation Science, Shihezi 832000, Xinjiang, China
  • Received:2012-06-13 Revised:2012-10-04 Online:2013-02-10 Published:2013-02-10

摘要: 针对耕地非农转化过程中产生的一系列社会问题,采用参与性农户调查方法,对西部欠发达地区西宁市郊区5个样本村190户农户进行了随机入户调查。根据城市开发进程、到市区距离和种植类型等条件,将调查样本村分为近郊城区化农村、近郊农村和远郊农村,就农户对耕地非农转换的基本认知及耕地非农转换的经济、社会和环境价值感知进行分析。结果表明:耕地征用后农户能理性感知和判别耕地非农转换价值,并普遍认为失去耕地后生活费用增加、生活保障降低、收入来源和就业机会少;感知主要受耕地数量、区位条件、耕地开发阶段等因素的影响;处于不同区位条件的农户对耕地非农转换的价值感知存在差异性,城区化农户已逐渐适应城市生活,近郊农户的非农转换经济和社会感知压力最大,远郊农民也感知经济和生活保障压力,但更希望能通过打工增加收入。

关键词: 新疆, 棉田, CO2浓度升高, 氮肥, 土壤理化性质, 土壤微生物区系

Abstract: To illuminate influence of elevated CO2 and nitrogen supply on cotton field properties and microbial flora in the plot experiment, this study investigated organic carbon, total nitrogen, bicarbonate ion, pH, total salt and soil bacteria, soil fungi, soil actinomycetes under ambient CO2(360 μmol·mol-1) and elevated CO2 (540 and 720 μmol·mol-1) at 4 nitrogen levels (0, 150, 300 and 400 kgN/hm2). The results showed that, organic carbon, total nitrogen and pH at a soil depth of 0-40 cm tended to decrease elevated CO2(720 μmol·mol-1) at different nitrogen levels, but less effects on soil bicarbonate ion and total salt were found. Both bacteria population at a soil depth of 0-40 cm and actinomycetes population at 0-20 cm were enlarged, but fungi population at 20-40 cm soil depth tended to decrease under elevated CO2 concentration (540 and 720 μmol·mol-1) at different nitrogen levels.

Key words: Xinjiang, cotton field, elevated CO2 concentration, nitrogen fertilizer, soil properties, soil microbial flora