干旱区研究

干旱区研究 ›› 2011, Vol. 28 ›› Issue (4): 616-621.

• 水土资源及其利用 • 上一篇    下一篇

黄土丘陵沟壑区植被类型对土壤质量的影响

董莉丽1,3, 郑粉莉1,2   

  1. 1. 中国科学院水利部水土保持研究所 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;
    2. 西北农林科技大学 资源与环境学院, 陕西 杨凌 712100;
    3. 咸阳师范学院 资源环境与城市科学系, 陕西 咸阳 712000
  • 收稿日期:2010-06-09 修回日期:2010-07-16 出版日期:2011-08-25 发布日期:2011-09-06
  • 作者简介:董莉丽(1979-),女,陕西扶风人,博士,研究方向为环境修复与生态效应评价.E-mail: donglili@stu.snnu.edu.cn
  • 基金资助:

    中国科学院西部行动计划(二期)"水文过程响应及其模拟"(KZCX2-XB2-05-03);西北农林科技大学创新团队建设计划项目(01140202)

Effects of Vegetation Types on Soil Quality in the Loess Hilly-gully Region

DONG Li-li1,3, ZHENG Fen-li1,2   

  1. 1. State Key Laboratory of Soil Erosion and Dryland Farming on Loess Plateau, Institute of Soil and Water Conservation, Chinese Academy of Science and Ministry of Water Resources, Yangling, Shaanxi 712100, China;
    2. College of Resources and Environment, North West A&F University, Yangling, Shaanxi 712100, China;
    3. Department of Resources, Environment and Urban Science, Xianyang Normal University, Xianyang 712000
  • Received:2010-06-09 Revised:2010-07-16 Published:2011-08-25 Online:2011-09-06

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被引次数

33

摘要： 土壤质量是支撑地球生物圈和进行可持续农业生产的最重要的环境因子之一。以黄土丘陵沟壑区的纸坊沟流域为研究区,选取不同植被类型和不同恢复年限的样地8块,测定土壤微生物性质(微生物生物量碳、微生物生物量氮、微生物生物量磷、微生物商)、土壤化学性质(土壤有机碳、全氮、碳氮比、碱解氮、销态氮、铵态氮和速效磷)、土壤酶活性(转化酶活性、碱性磷酸酶活性、脲酶)、土壤物理性质(黏粒、物理性黏粒、团聚体分形维数、团聚体平均质量直径、团聚体几何平均直径)等19个土壤属性。基于因子分析和隶属度函数,计算土壤质量指数(SQI),研究陕北黄土丘陵沟壑区植被类型对土壤质量的影响。结果表明:土壤质量指数(SQI)变化介于0.09～0.73之间,其中,农地土壤质量指数最小,SQI为0.09,31年刺槐地SQI最高,其值为0.73。同一植被类型下,SQI随植被恢复年限的增加而增加;相同恢复年限下,刺槐林地的SQI大于油松林。表明植被重建和农地撂荒会提高土壤质量,而粗放的农业耕作会降低土壤质量。

关键词: 植被类型, 土壤质量, 环境因子, 隶属度函数, 黄土丘陵沟壑区

Abstract: Soil quality is one of the most important environmental factors in sustaining the earth biosphere and developing sustainable agricultural product. Zhifanggou catchment of Ansai county of Shaanxi province was selected as the study area. Field investigations had been carried out and 8 sample plots with different vegetation types and ages were chosen. The effects of vegetation types on soil properties were analyzed through measuring soil particle size distributions, soil water stable aggregates, soil organic matter, total nitrogen, alkali-hydrolyzable nitrogen, ammonium nitrogen, nitrate nitrogen, available phosphorus, soil enzyme activities (invertase, alkaline phosphatase, and urease catalase), microbial biomass (carbon, nitrogen and phosphorus). The effects of vegetation types on soil quality were studied by calculating soil quality index (SQI) using factor analysis and membership function. Results indicate that SQI were 0.09-0.73, SQI in the crop land was the lowest, which was 0.09;SQI in the Robinia pseudoacacia forestland with 31-years age was the highest, which was 0.73. Under the same vegetation type, SQI increased with an increase of restoration year. Meanwhile, under the same restoration year, SQI in the Robinia pseudoacacia forestland was greater than that in the Pinus tabulaeformis forestland. These results showed that vegetation restoration and abandoned land can improve soil quality and extensive agricultural farming can decrease soil quality.

Key words: vegetation type, soil quality, factor analysis, membership function, loess hilly-gully regions

中图分类号: 

  • S158.3