大豆发酵液配施磷肥对玉米苗期生长及土壤磷有效性的影响

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中图分类号：S513 文献标志码：A文章编号：1001-411X（2025）06-0863-09

Abstract： 【Objective】To address the problem of low phosphorus （P） fertilizer utilization efciency in crops caused by low P availability in acidic soils of southern China， this study used a pot experiment to investigate the effects of applying soybean fermentation broth combined with P fertilizer on soil available P. 【Method】 Under the maize pot experiment， the content levels of KH2PO4 were set at 0.05， 0.10， and 0.15g⋅kg-1 respectively. For each level， four gradients （with dilutionratios of 100，300，500，and 700-time，respectively）of soybean fermentation broth were arranged for mixed applicationwith KH2PO4 .【Result】 The combined application of soybean fermentation broth and P fertilizer promoted maize growth at the seedling stage， mainly manifested in plant height， stemdiameter，netphotosyntheticrate，androot growth.Specificaly，soybean fermentationbroth mixing 0.05g⋅kg-1P significantly promoted the balanced growth of maize plants and roots， with the leaf net photosynthetic rate being significantly increased by 75.03% compared with the P fertilizer alone treatment. In soil chemical properties， soybean fermentation broth mixing 0.05g⋅kg-1 P increased soil pH and effectively reducedsoil electrical conductivity.Atthis P level， comparedwith the P fertilizer alone treatment，1oo-time soybean fermentation broth resulted in a substantial increase of 258.86% in available P content. Meanwhile， the contents of Al-P and Fe-P showed the highest increases of 162.48% and 135.91% ，respectively. 【Conclusion】 The combined application of soybean fermentation broth and P fertilizer exerts a positive effect on soil P availability， with the 0.05g⋅kg-1P level combined with 1oo-time soybean fermentation broth exhibiting a more pronounced enhancement effect on P availability.

Key words： Soybean fermentation broth; Phosphorus; Availability; Maize; Seedling

磷（P）是作物生长的必需元素，对作物产量、品质及抗逆性具有重要调控作用。（剩余15469字）