• ISSN 1008-505X
  • CN 11-3996/S
郝桂娟, 任天志, 张贵龙, 李文彪, 周尧治. 大兴安岭旱作丘陵区耕地肥力演变研究[J]. 植物营养与肥料学报, 2009, 15(3): 559-566. DOI: 10.11674/zwyf.2009.0310
引用本文: 郝桂娟, 任天志, 张贵龙, 李文彪, 周尧治. 大兴安岭旱作丘陵区耕地肥力演变研究[J]. 植物营养与肥料学报, 2009, 15(3): 559-566. DOI: 10.11674/zwyf.2009.0310
HAO Gui-juan, REN Tian-zhi, ZHANG Gui-long, LI Wen-biao, ZHOU Yiao-zhi. Study on soil fertility evolvement of farmland in Daxing’an rainfed farming hilly regions[J]. Journal of Plant Nutrition and Fertilizers, 2009, 15(3): 559-566. DOI: 10.11674/zwyf.2009.0310
Citation: HAO Gui-juan, REN Tian-zhi, ZHANG Gui-long, LI Wen-biao, ZHOU Yiao-zhi. Study on soil fertility evolvement of farmland in Daxing’an rainfed farming hilly regions[J]. Journal of Plant Nutrition and Fertilizers, 2009, 15(3): 559-566. DOI: 10.11674/zwyf.2009.0310

大兴安岭旱作丘陵区耕地肥力演变研究

Study on soil fertility evolvement of farmland in Daxing’an rainfed farming hilly regions

  • 摘要: 以全国第二次土壤普查资料为主要数据源,结合实地取样测定,比较分析了大兴安岭东南麓旱作丘陵区1981~2007年期间土壤肥力演变状况。结果表明,二十多年间耕地土壤养分含量发生明显变化。主要表现为:土壤有机质、全氮、碱解氮和速效钾含量明显下降,速效磷含量增加,但不同土壤类型的变化幅度不同;草甸土的有机质和全氮含量下降幅度大于暗棕壤和黑土,碱解氮含量在黑土中的下降幅度较大,暗棕壤次之,草甸土较低;暗棕壤中有效磷增加的幅度大于黑土和草甸土;速效钾在暗棕壤中下降的幅度最大,在黑土中下降的幅度最小;该区土壤中富含交换性钙、交换性镁、有效硫、有效硅等中量元素和锌、铜、铁和锰等微量元素;现有耕地约有87.2%的土壤缺硼,78.2%的土壤缺钼。

     

    Abstract: Soil fertility plays an important rule in the soil resource utilization. The better understanding of both the soil fertility evolvement laws and its contributing factors is critical for agricultural conservation and management. The main aim of this study is to estimate the recent soil change in Daxing’an rainfed farming hilly regions. Data used in this study are mainly from the second national soil census conducted in 1980-1982 and the soil surveys on the concerned spot taken place in 2002-2007. Through the comparisons of soil fertility indices in years between 1982 and 2007, it is showed that total nitrogen, alkali-hydrolyzable nitrogen and readily available potassium of soil are decreased since 1982, while soil available phosphorus is increased. We find that the changing spectrums of these indices are different. The decreased organic matter content and total nitrogen content of meadow soils are larger than those in dark brown soils and black soils. The decreased alkali-hydrolyzable nitrogen content of black soils is larger than that of dark brown soils, while for meadow soils it is less than that of dark brown soils. Available phosphorus content is decreased through the years in dark brown soils, which is larger than that of black soils and meadow soils. Readily available potassium is declined in dark brown soils, which is the most among all three types of soils. According to our findings, abundant medium elements such as exchangeable calcium, exchangeable magnesium, available sulfur and available silica, and microelements, such as zinc, copper, iron and manganese remain consistently in soils of the study regions. Additionally, we find that 87.2% of the soils in the arable lands of study areas are short of boron, and 78.2% of those are in molybdenum deficiency.

     

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