欢迎访问《应用生态学报》官方网站,今天是 分享到:

应用生态学报 ›› 2018, Vol. 29 ›› Issue (6): 1839-1845.doi: 10.13287/j.1001-9332.201806.002

• 研究报告 • 上一篇    下一篇

青藏高原草地管理方式对土壤养分及其空间分布的影响

曹建军*,王雪艳,李梦天,杨书荣,许雪贇,龚毅帆   

  1. 西北师范大学地理与环境科学学院, 兰州 730070
  • 收稿日期:2017-11-28 修回日期:2018-02-12 出版日期:2018-06-18 发布日期:2018-06-18
  • 通讯作者: E-mail: caojj@nwnu.edu.cn
  • 作者简介:曹建军, 男, 1974年生, 博士研究生. 主要从事草地生态学研究. E-mail: caojj@nwnu.edu.cn
  • 基金资助:

    本文由国家自然科学基金项目(41461109)、甘肃省自然科学基金项目(1506RJZA124)和中国科学院内陆河流域生态水文重点实验室开放基金项目(KLEIRB-ZS-16-01)资助

Effects of grassland management on soil nutrients and their spatial distribution on the Qinghai-Tibetan Plateau, China

CAO Jian-jun*, WANG Xue-yan, LI Meng-tian, YANG Shu-rong, XU Xue-yun, GONG Yi-fan   

  1. College of Geography and Environmental Science, Northwest Normal University, Lanzhou 730070, China
  • Received:2017-11-28 Revised:2018-02-12 Online:2018-06-18 Published:2018-06-18
  • Supported by:

    This work was supported by the National Natural Science Foundation of China (41461109), the Natural Science Foundation of Gansu Province (1506RJZA124), and the Key Laboratory of Eco-hydrology of Inland River Basin, Chinese Academy of Sciences (KLEIRB-ZS-16-01).

摘要: 草地承包制度实施后,青藏高原地区出现了单户与联户两种草地管理方式.本研究以西藏那曲县为研究区域,对两种管理方式的土壤养分及其空间分布进行了对比研究.结果表明: 联户土壤有机碳、全氮和全磷含量分别为84.31、6.87和0.59 g·kg-1,均显著高于单户(73.57、6.07和0.54 g·kg-1);垂直空间上,除单户0~15 cm土层土壤全磷的变异系数与15~30 cm土层无显著差异外,单户与联户15~30 cm土层土壤pH、有机碳和全氮的变异系数均显著大于0~15 cm土层;水平空间上,单户土壤有机碳和全氮变异系数分别为25.7%和23.5%,显著大于联户的19.3%和18.6%.与联户相比,单户土壤养分水平空间上的不均匀分布更容易造成土壤养分流失.

Abstract: After grasslands were contracted to individual households on the Qinghai-Tibetan Pla-teau, two grassland management patterns were formed, i.e., the single-household management pattern (SMP) and the multi-household management pattern (MMP). The soil nutrients and their spatial distributions under those two patterns were compared in the Nagchu Prefecture of Tibet. The results showed that the soil organic carbon, total nitrogen, and total phosphorus under the MMP (84.31, 6.87 and 0.59 g·kg-1) were all significantly higher than those under the SMP (73.57, 6.07 and 0.54 g·kg-1). On the vertical dimension, the variation coefficient of soil total phosphorous between 0-15 cm layer and 15-30 cm layer under SMP had no significant difference, while that of soil pH, soil organic carbon and total nitrogen in 15-30 cm layer were all higher than 0-15 cm layer under both patterns. On the horizontal dimension, the variation coefficients of soil organic carbon and total nitrogen under SMP were significantly higher than those under MMP, with the estimated values for the former being 25.7% and 23.5%, and for the latter being 19.3% and 18.6%, respectively. Compared with the MMP, the uneven distribution of nutrients could easily lead to soil nutrient loss under the SMP.