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Chinese Agricultural Science Bulletin ›› 2025, Vol. 41 ›› Issue (18): 130-137.doi: 10.11924/j.issn.1000-6850.casb2024-0752

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Influence of Adding Different Organic Materials with Equal Carbon Content on Aggregates and Organic Carbon Content of Sandy Soil

LI Yuan1(), PENG Bo2, WU Lianxia3, XIA Weixin4, LI Qingjun1()   

  1. 1 Institute of Agricultural Resources and Environment, Xinjiang Academy of Agricultural Sciences, Urumqi 830091
    2 Xinjiang Forestry School, Urumqi 830023
    3 Xinjiang Yehe Agricultural Science and Technology Co., Ltd., Urumqi 830028
    4 Xinjiang Shiyongda Agricultural Science and Technology Co., Ltd., Urumqi 830091
  • Received:2024-12-02 Revised:2025-05-13 Online:2025-06-25 Published:2025-07-06

Abstract:

Aiming to solve the problem of poor sandy soil in southern Xinjiang, soil carbon sequestration and fertilization experiments were carried out. Six groups of control treatments were set up, including NPK fertilizer without organic materials, NPK fertilizer+chicken manure (NPKJ), NPK fertilizer+cow manure (NPKN), NPK fertilizer+pig manure (NPKP), NPK fertilizer+corn straw compost (NPKY) and NPK fertilizer+biogas residue (NPKZ), and the effects of different organic materials with equal carbon content on soil aggregates, organic carbon and their active components were studied. The results for two consecutive years showed that the micro-aggregates with a particle size of <0.053 mm were the main ones in each treatment, and the effect on the aggregates of >0.25 mm were not significant. In 0-40 cm, the organic carbon in treatments with organic materials had no significant differences, but they were significantly higher than that of the NPK treatment. The soil active organic carbon content of each treatment was significantly higher than that of NPK treatment at 0-40 cm, particularly in NPKJ treatment at 0-20 cm, which increased by 110.42% compared to NPK, and there was no significant difference between treatments of 20-40 cm. After the input of organic materials, the soil microbial biomass carbon content at 0-40 cm of each treatment was significantly increased as well, and the NPKJ treatment of 0-20 cm soil layer was much higher than that of other treatments, which was 202.78% higher than that of NPK, and no significant differences were witnessed among treatments at 20-40 cm. The yield of tomato under chicken manure treatment was significantly better than that of other treatments, which was 12.45% higher than that of NPK. Based on the experiments, chicken manure treatment had the best effect on soil carbon sequestration and yield increase.

Key words: organic materials, organic carbon, microbial biomass carbon, aggregate, active organic carbon, aeolian sandy soil, southern Xinjiang