解磷菌对紫花首蓿光合特性、抗氧化活性及产量的影响

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中图分类号:S541.9 文献标识码:A 文章编号:1007-0435(2025)11-3643-1

引用格式:,等.解磷菌对紫花苜蓿光合特性、抗氧化活性及产量的影响[J].草地学报,2025,33(1):3643-3653WEIKong-qin,SUNYan-liang,HUI Jin-feng,et al.Effectsof Phosphate Solubilizing Bacteriaon PhotosyntheticCharacteristics,Antioxidant Activity,and YieldofAlfalfa[J].Acta Agrestia Sinica,2O25,33(11):3643-3653

Effects of Phosphate Solubilizing Bacteria on Photosynthetic Characteristics, Antioxidant Activity,and Yield of Alfalfa

WEI Kong-qin,SUN Yan-liang,HUI Jin-feng,MA Chun-hui,ZHANG Qian-bing* (Animal Science and Technology College,Shihezi University,Shihezi,Xinjiang 832Oo3,China)

Abstract:To investigate the effects of phosphate solubilizing bacteria(PSB)on alfalfa(Medicago satiua L.), a pot experiment was conducted using a single-factor randomized block design with six treatments: non-inoculated control(CK),and single inoculations with strains YO15,Y316,WO03,WO06,and YO14. The results showed that PSB inoculation significantly increased leaf phosphorus (P) content compared to CK ( ⋅P<0.05) ) Additionally,PSB enhanced net photosynthetic rate (Pn) ,transpiration rate(T,),stomatal conductance (Gs) , intercellular CO2 concentration (Ci) ,light-use efficiency (LUE),and instantaneous water-use efficiency (WUE)by 11.01% , 32.70% , 25.97% , 7.85% , 10.54% ,and 5.29% ,respectively,while reducing stomatal limitation(Ls)by 11.69% . PSB inoculation also significantly elevated soluble sugar(SS),non-structural carbohydrate(NSC) content,superoxide dismutase(SOD) activity,and reduced glutathione(GSH) levels ( P <0.05) ,and increased yield by 15.95% . The comprehensive evaluation ranked as: Y316>W003>Y015> W006>Y014>CK . These findings indicate that PSB improves alfalfa yield by enhancing photosynthetic performance and antioxidant activity, ofering a sustainable approach for agricultural production.

Key words:Phosphate solubilizing bacteria; Alfalfa;Photosynthetic performance;Antioxidant activity;Dry matteryield

紫花苜蓿(MedicagosatiuaL.)是一种优质的多年生豆科牧草,具有产量高、营养品质高及适应性强等特点,在世界上广泛种植。(剩余18285字)

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