Scholarlink

<p>Phosphorus (P) availability limits photosynthesis and nutrient-use efficiency in sugarcane, often requiring high fertilizer inputs. Although organomineral fertilizers (OF) and plant growth-promoting bacteria can enhance P use efficiency, their combined effects on plant physiology under reduced P input remain poorly understood. This study evaluated whether combining OF with <i>Bacillus velezensis</i> UFV 3918 (Bv) improves physiological performance and nutritional efficiency under reduced monoammonium phosphate (MAP) rates.&#xa0;Sugarcane plants were grown under reduced and full MAP rates (41.7, 83.3, and 125&#xa0;kg ha<sup>–1</sup> – 1/3, 2/3, and 3/3 MAP), combined with OF (500&#xa0;kg ha<sup>–1</sup>) and inoculation with <i>B. velezensis</i> (2&#xa0;L ha<sup>–1</sup>; 10<sup>8</sup> CFU mL<sup>–1</sup>). Physiological, biochemical, nutritional, and biomass traits were assessed at key growth stages.&#xa0;Bv + OF+1/3 MAP increased total chlorophyll (+ 11%), electron transport rate (+ 26%), and photochemical quenching (+ 20%), while reducing non-photochemical quenching (− 9%) compared with full MAP. These responses were associated with higher stomatal conductance and carboxylation efficiency (up to + 125%). Inoculation enhanced nutrient accumulation in roots and stalks under reduced MAP. Multivariate analysis indicated that inoculated treatments were associated with improved photosynthetic performance, whereas non-inoculated plants under high MAP were linked to photoprotective responses and nutrient accumulation. Stalk biomass was maintained, while root biomass increased (+ 13.8%).&#xa0;The combined use of <i>B. velezensis</i> UFV 3918 and OF reduces the need for MAP input by 66% while enhancing photosynthetic performance and maintaining biomass, representing a promising strategy for sustainable phosphorus management in sugarcane.</p> Graphical Abstract <p></p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Combining Bacillus velezensis with Organomineral Fertilization Enhances Photosynthesis and Biomass While Reducing Phosphate Input in Sugarcane

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年5月28日

查看全文
  • Hariane Luiz Santos,
  • Gustavo Ferreira da Silva,
  • Maria Eduarda da Silva Benevente,
  • Isadora Malveira Costa Frederico,
  • Marcelo de Almeida Silva

摘要

Phosphorus (P) availability limits photosynthesis and nutrient-use efficiency in sugarcane, often requiring high fertilizer inputs. Although organomineral fertilizers (OF) and plant growth-promoting bacteria can enhance P use efficiency, their combined effects on plant physiology under reduced P input remain poorly understood. This study evaluated whether combining OF with Bacillus velezensis UFV 3918 (Bv) improves physiological performance and nutritional efficiency under reduced monoammonium phosphate (MAP) rates. Sugarcane plants were grown under reduced and full MAP rates (41.7, 83.3, and 125 kg ha–1 – 1/3, 2/3, and 3/3 MAP), combined with OF (500 kg ha–1) and inoculation with B. velezensis (2 L ha–1; 108 CFU mL–1). Physiological, biochemical, nutritional, and biomass traits were assessed at key growth stages. Bv + OF+1/3 MAP increased total chlorophyll (+ 11%), electron transport rate (+ 26%), and photochemical quenching (+ 20%), while reducing non-photochemical quenching (− 9%) compared with full MAP. These responses were associated with higher stomatal conductance and carboxylation efficiency (up to + 125%). Inoculation enhanced nutrient accumulation in roots and stalks under reduced MAP. Multivariate analysis indicated that inoculated treatments were associated with improved photosynthetic performance, whereas non-inoculated plants under high MAP were linked to photoprotective responses and nutrient accumulation. Stalk biomass was maintained, while root biomass increased (+ 13.8%). The combined use of B. velezensis UFV 3918 and OF reduces the need for MAP input by 66% while enhancing photosynthetic performance and maintaining biomass, representing a promising strategy for sustainable phosphorus management in sugarcane.

Graphical Abstract