Acta Agrestia Sinica

›› 2002, Vol. 10 ›› Issue (2): 118-123.DOI: 10.11733/j.issn.1007-0435.2002.02.008

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Effects of the Growth of Cultivated Puccinellia tenuiflora on Physical Characteristics of Alkali Soil

SUN Guo-rong1, YAN Xiu-feng2, LI Jing3   

  1. 1. Department of Biology, Harbin Normal University, Harbin, 150080, China;
    2. Open Research Laboratory of Forest Plant Ecology, Nort heast Forestry University, Harbin, 150040, China;
    3. North east Agriculture University, Harbin, 150030, China
  • Received:2001-11-22 Revised:2002-03-07 Online:2002-05-15 Published:2002-05-15

星星草对碱化土壤物理性质的影响

孙国荣1, 阎秀峰2, 李晶3   

  1. 1. 哈尔滨师范大学生物系, 哈尔滨, 150080;
    2. 东北林业大学森林植物生态学开放研究实验室, 哈尔滨, 150040;
    3. 东北农业大学基础部, 哈尔滨, 150030
  • 通讯作者: 阎秀峰
  • 作者简介:孙国荣(1964- ),男,1989年武汉大学生物系硕士,现任哈尔滨师范大学生物系教授,主要从事草地植物生理生态学和盐碱地改良及植被恢复研究工作,已发表学术论文60余篇

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Abstract: The mechanical constituent,porosity,volume weight and water content of soil of P.tenuiflora growth for different years of which compared with alkali spot soil were studied,the results indicated that the proportion of clay and fine sand was decreased,but that of the coarse silt and fine silt increased in the soil of which P.tenuiflora growth for one,two and three years contracted to the soil of alkali spot;total porosity,capillary porosity and non capillary porosity,and volume weight and water stability complex(>0.25mm)of alkali soil increased to some extent following the increase of P.tenuiflora growing year;the water content and water holding capacity of the soil were increased by the growth of P.tenuiflora was higher than that of alkali spot.The growth of P.tenuiflora improved the construction,permeability and water retention property that improved the physical environment for the growth and productivity of the vegetation of that natural grassland.

Key words: Puccinellia tenuiflora, Alkali soil, Mechanical constituent of soil, Porosity of soil, Volume weight of soil

摘要： 研究不同生长年限的星星草对碱化土壤及对应碱斑土壤的机械组成、土壤孔隙度、容重和含水量的影响。结果表明,星星草生长1、2和3年后,粘粒和细砂所占比例减小,而粗粉和细粉所占比例增大。土壤总孔隙度、毛管孔隙度和非毛管孔隙度随着生长年数的增加呈不同程度的增加,而土壤容重则越来越小,>0.25mm的水稳定性团聚体随之增加。星星草地土壤含水量和田间持水量均高于碱斑土壤。星星草改善了碱化土壤结构、通透性、保水性和土壤物理环境。

关键词: 星星草, 碱化土壤, 土壤机械组成, 土壤孔隙度, 土壤容重

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