• ISSN 1008-505X
  • CN 11-3996/S
WANG Shao-bo, CAO Ya-qian, FENG Qian-qian, GUO Liang-liang, LIANG Hai, WANG Xue-jie, HAN Hui-fang, NING Tang-yuan. Impacts of conservation tillage on soil particulate composition and distribution of soil carbon and nitrogen in brown soil[J]. Journal of Plant Nutrition and Fertilizers, 2019, 25(5): 792-804. DOI: 10.11674/zwyf.18157
Citation: WANG Shao-bo, CAO Ya-qian, FENG Qian-qian, GUO Liang-liang, LIANG Hai, WANG Xue-jie, HAN Hui-fang, NING Tang-yuan. Impacts of conservation tillage on soil particulate composition and distribution of soil carbon and nitrogen in brown soil[J]. Journal of Plant Nutrition and Fertilizers, 2019, 25(5): 792-804. DOI: 10.11674/zwyf.18157

Impacts of conservation tillage on soil particulate composition and distribution of soil carbon and nitrogen in brown soil

  • Objectives To analyze the impact of long-term conservation tillage in brown soil on soil particulate composition and heterogeneity variation characteristics and explore ways to promote sustainable crop production while maintaining soil quality.
    Methods A laser particle size( LS13320) analyzer was used to measure the particle size distribution of soil samples. The soil samples were collected from the top 0−40 cm soil depth of six treatments in a wheat−maize rotation system in 2006 and 2007, respectively, in the long-term tillage experiment on brown soil in Shandong Agricultural University Experimental Station. The tillage treatments included conventional tillage, no-till, and subsoiling tillage. Straw incorporation included complete return and straw removal. Soil particle fractionation was used to analyze soil particulate composition and its relationship with crop management.
    Results On the characteristics of soil particulate size, the percentage of clay particulates was no-till > subsoiling > conventional tillage, and straw returning >the original soil> straw removal. Under the long-term continuous conservation tillage, clay particulates increased in the no-till straw returning, while soil C/N ratio reduced. The lower C/N ratio promotes decomposition of soil carbon and nitrogen. Values of soil multifraction parameters, D(1)、D(1)/D(0)、D(2) and Δa, showed increase in subsoiling tillage and no-till compared to conventional tillage, demonstrating the benefits of the subsoiling and no-till to soil particulate refinement, and improvement of soil particle heterogeneity. Subsoiling with straw returning increased soil particle aggregate inhomogeneity, enhanced soil structure stability and overall soil physical properties.
    Conclusions Soil clay particulate and C/N ratio were significantly negatively correlated with no-till and straw returning, with increasing soil N and total N content. Multifraction parameters are useful indicators of soil properties.
  • loading

Catalog

    Turn off MathJax
    Article Contents

    /

    DownLoad:  Full-Size Img  PowerPoint
    Return
    Return