• ISSN 1008-505X
  • CN 11-3996/S

施用生物炭和解磷菌肥对我国农田土壤磷素有效性及作物生长的影响

Effects of biochar and phosphate-solubilizing biofertilizer applications on phosphorus availability and crop growth in farmland of China

  • 摘要:
    目的 总结分析生物炭和解磷菌肥种类、施用方式及施用量对我国土壤磷素有效性和作物生长的影响,为高效调控农田土壤磷素有效性和作物生长提供宏观指导。
    方法 收集2014—2024年期间公开发表的50篇研究论文,提取生物炭和解磷菌肥施用下土壤全磷、有效磷、磷酸酶活性,及作物株高、地上生物量(AGB)、地下生物量(UGB)数据233组,利用Meta分析方法探讨生物炭和解磷菌肥的种类及添加方式(单施、混施)对土壤磷素有效性及作物生长指标的影响,采用回归分析探究生物炭、解磷菌肥施用量与土壤有效磷含量、磷酸酶活性及作物株高的关系。
    结果 1)生物炭与解磷菌肥混施对土壤有效磷含量、磷酸酶活性及作物株高的提升效果显著优于生物炭、解磷菌肥单施。生物炭单施、解磷菌单施和生物炭与解磷菌混施3种添加方式对土壤有效磷含量的提升幅度依次为46.44%、31.88%和138.11%。2)解磷菌群组合(解磷细菌+解磷真菌)、解磷细菌、解磷真菌3类解磷菌肥均能提高土壤有效磷及作物生长,组合解磷菌肥与生物炭混施对有效磷含量的提升量是单施组合解磷菌肥的15倍,效应值达395.50%。3)不同种类生物炭对土壤磷素有效性和作物发育的影响不同,生物炭组合施用对土壤磷素有效性及作物株高的提升作用显著,且与解磷菌肥混施对有效磷含量和作物株高有显著协同增效作用。4)不同作物体系和区域条件下,土壤有效磷含量对生物炭及解磷菌肥施用响应存在差异,单施生物炭对饲料作物及经济作物土壤有效磷含量影响显著,效应值达52.79%、47.67%,单施解磷菌肥则显著提升粮食作物土壤中的有效磷含量,效应值分别为52.98%。单施生物炭、单施解磷菌肥、解磷菌肥+生物炭混施对北方土壤有效磷含量的效应值均大于南方,效应值分别相差65.24、16.04、78.95个百分点。5)土壤有效磷含量、磷酸酶活性及作物株高与生物炭和解磷菌肥施用量均呈显著正相关。
    结论 生物炭和解磷菌肥施用对提高土壤磷素有效性和促进作物生长具有重要作用,二者混合施用具有显著的协同效果。相较于单一菌种菌肥,含解磷细菌与解磷真菌的组合菌肥展现出更优效果。无论是单独施用生物炭和解磷菌肥,还是将其混合施用,其在北方提升土壤有效磷含量的效果均优于南方。在已报道的生物炭和解磷菌肥施用量范围内,施用量与土壤有效磷含量、磷酸酶活性及作物株高均呈显著正相关。

     

    Abstract:
    Objectives This study synthesized the effects of biochar and phosphate-solubilizing biofertilizers (PSBF) on soil phosphorus availability and crop growth across China, so as to provide guidance for efficiently managing farmland phosphorus availability and crop productivity.
    Methods Fifty research papers published between 2014 and 2024 were collected, and a total of 233 datasets were extracted, including soil total and available P (AP) content, and phosphatase activity, and crop growth parameters such as plant height, above-ground biomass, and under-ground biomass. A meta-analysis conducted to assess the impacts of different application strategies involving biochar and PSBFs. Additionally, regression analysis was conducted to examine the relationships between the application rates of biochar and PBSFs and key soil and crop indicators.
    Results 1) The increment of soil AP resulted from application of biochar, PSBF, and both together were 46.44%, 31.88%, and 138.11%, highlighting the better effect of combined application. 2) All types of PSBFs (including phosphate-solubilizing bacteria, fungi, and together) increased soil AP and crop growth notably, and the combined application of PSBFs with biochar resulted in a 15-fold greater improvement in AP than the single application of PSBFs, achieving an effect size of 395.50%. 3) Biochar types showed significantly varied effects on soil phosphorus availability and crop growth, and the mixed application of biochar derived from different sources exhibited the most pronounced effects. Furthermore, the integrated application of biochar and PSBFs had synergistic effect on increasing soil AP and crop height. 4) The effects of biochar and PSBFs on soil AP varied across various cropping systems and regions in China. Biochar alone significantly increased AP in forage and cash crop soils by 52.79% and 47.67%, PSBF alone enhanced AP by 52.98% in grain crop soils. Greater increases in soil AP were achieved in northern China than in southern China, with differential effects of 65.24 percentage point (biochar alone), 16.04 percentage point (PSBF alone), and 78.95 percentage point (PSBF and biochar together). 5) Within the reported ranges, positive correlations were observed between the application rates of biochar and PSBF and soil AP, phosphatase activity, and crop height.
    Conclusions The application of biochar and phosphate-solubilizing microbial fertilizers improves soil phosphorus availability and promotes crop growth, with their combined application demonstrating a pronounced synergistic effect. Composite microbial fertilizers containing a combination of phosphate-solubilizing bacteria and fungi outperform those with a single microbial species. Whether applied individually or in combination, biochar and phosphate-solubilizing microbial fertilizers demonstrate a greater effectiveness in increasing the available phosphorus content in northern soils compared to southern soils. Within the reported application rates of biochar and phosphate-solubilizing microbial fertilizers, there is a significant positive correlation between the application amount and soil available phosphorus content, phosphatase activity, as well as plant height.

     

/

返回文章
返回