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应用生态学报 ›› 2017, Vol. 28 ›› Issue (5): 1626-1632.doi: 10.13287/j.1001-9332.201705.021

• 目次 • 上一篇    下一篇

黄土高原不同土壤质地农田土壤碳、氮、磷及团聚体分布特征

葛楠楠1,2, 石芸3, 杨宪龙4, 张庆印4, 李学章4, 贾小旭4, 邵明安4, 魏孝荣1,4*   

  1. 1中国科学院教育部水土保持与生态环境研究中心, 陕西杨凌 712100;
    2中国科学院大学, 北京 100049;
    3陕西省定边县农技中心, 陕西定边 718600;
    4西北农林科技大学黄土高原土壤侵蚀与旱地农业国家重点实验室, 陕西杨凌 712100
  • 收稿日期:2016-09-28 修回日期:2017-02-20 发布日期:2017-05-18
  • 通讯作者: *E-mail: xrwei78@163.com
  • 作者简介:葛楠楠, 女, 1992年生, 硕士研究生. 主要从事黄土高原土壤生态学研究. E-mail: 15239757570@163.com
  • 基金资助:
    本文由国家自然科学基金项目(41571130082,41571296,41622105)和教育部新世纪优秀人才支持计划项目(NCET-13-0487)资助

Distribution of soil organic carbon, total nitrogen, total phosphorus and water stable aggregates of cropland with different soil textures on the Loess Plateau, Northwest China

GE Nan-nan1,2, SHI Yun3, YANG Xian-long4, ZHANG Qing-yin4, LI Xue-zhang4, JIA Xiao-xu4, SHAO Ming-an4, WEI Xiao-rong1,4*   

  1. 1Research Center of Soil and Water Conservation and Ecological Environment, Chinese Academy of Sciences and Ministry of Education, Yangling 712100, Shaanxi, China;
    2University of Chinese Academy of Sciences, Beijing 100049, China;
    3Agricultural Technology Center of Dingbian County, Dingbian 718600, Shaanxi, China;
    4State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Northwest A&F University, Yangling 712100, Shaanxi, China
  • Received:2016-09-28 Revised:2017-02-20 Published:2017-05-18
  • Contact: *E-mail: xrwei78@163.com
  • Supported by:
    This work was supported by the National Natural Science Foundation of China (41571130082, 41571296, 41622105), and the Program for New Century Excellent Talents in Universities of Ministry of Education of China (NCET-13-0487)

摘要: 结合野外观测和室内分析,研究了黄土高原不同土壤质地农田土壤碳、氮、磷含量及其生态计量学特征,以及土壤团聚体分布状况,以揭示土壤质地对区域农田土壤肥力的影响,以及土壤团聚体对肥力的调控作用.结果表明: 黄土高原农田土壤大团聚体含量、主要养分含量及其生态计量比值均随土壤质地由细变粗(壤质黏土→黏壤土→砂质壤土)逐渐降低;土壤pH值和微团聚体含量则呈现出相反的变化趋势. 随土壤黏粒含量增加,大团聚体含量、有机碳、全氮和全磷含量,以及C/P和N/P显著增加,土壤pH和微团聚体含量显著降低. 土壤有机碳、全氮和全磷含量,以及C/P和N/P随大团聚体含量的增加显著增加.表明区域尺度上农田土壤肥力状况取决于土壤质地,并受土壤大团聚体的调节.

Abstract: In this study, combined with field investigation and laboratory analyses, we assessed the distribution of soil organic carbon, nitrogen, phosphorous contents and their stoichiometric ratios, and the distribution of soil water stable aggregates along a soil texture gradient in the cropland of the Loess Plateau to understand the effect of soil texture and the regulation of soil aggregates on soil fertility in cropland. The results showed that, with the change from fine soils to coarse soils along the texture gradient (loam clay→ clay loam→ sandy loam), the contents of macroaggregates, organic carbon, nitrogen, phosphorous and their stoichiometric ratios decreased, while pH value and microaggregates content showed an opposite changing pattern. The contents of macroaggregates, organic carbon, nitrogen, phosphorous, and C/P and N/P were significantly increased, but pH value and microaggregates content were significantly decreased with increasing the soil clay content. Furthermore, the contents of organic carbon, nitrogen, phosphorous, and C/P and N/P increased with the increase of macroaggregates content. These results indicated that soil fertility in croplands at a regional scale was mainly determined by soil texture, and was regulated by soil macroaggregates.