Ma Wenjun, Luo Panjun, Ahmed Sarfraz, Hayat Hafiz Saqib, Anjum Shakeel Ahmad, Nian Lili, Wu Jun, Wei Yuzhen, Ba Wenxue, Haider Fasih Ullah, Cai Liqun
College of Resources and Environmental Sciences, Gansu Agricultural University, Lanzhou 730070, China.
Key Laboratory of Dry Land Crop Science, Gansu Agricultural University, Lanzhou 730070, China.
Plants (Basel). 2024 Nov 28;13(23):3333. doi: 10.3390/plants13233333.
Cadmium (Cd) contamination threatens human health and plant growth due to its accumulation in edible parts. The sole application of phosphorus-solubilizing bacteria (PSB), biochar (BC), and phosphorus (P) effectively mitigates Cd's adverse effects in contaminated agricultural systems. However, further investigation into their combined impacts on Cd toxicity and maize () production is essential. This study evaluates the synergistic effects of PSB (10 g kg of ), BC (5% /), and P (0.8 g kg) on soil properties and the morphological and physiological traits of maize cultivated in agricultural soil contaminated with Cd (20 mg kg). The study revealed that Cd toxicity negatively impacts soil properties, reducing shoot and root biomass, lowering chlorophyll content, and heightening oxidative stress levels. Conversely, the combined use of P, PSB, and BC markedly improved soil properties, increasing the organic matter by 175.94%, available K by 87.24%, and available P by 306.93% compared to the control. This combination also improved maize growth metrics, with increases in aboveground dry biomass (92.98%), root dry biomass (110.33%), chlorophyll a (28.20%), chlorophyll b (108.34%), and total chlorophyll (37.17%). Notably, the treatment reduced Cd concentrations in maize leaves by 61.08% while increasing soil Cd levels by 31.12% compared to the control group. Overall, the synergistic effect of P-BC-PSB is an eco-friendly strategy for mitigating Cd toxicity in contaminated soil. However, further studies are required to explore its effects and molecular mechanisms on other crops.
镉（Cd）污染因其在可食用部分的积累而威胁人类健康和植物生长。单独施用解磷细菌（PSB）、生物炭（BC）和磷（P）可有效减轻镉对受污染农业系统的不利影响。然而，进一步研究它们对镉毒性和玉米生产的综合影响至关重要。本研究评估了PSB（10 g/kg）、BC（5% w/w）和P（0.8 g/kg）对镉污染（20 mg/kg）农业土壤性质以及种植玉米的形态和生理特征的协同效应。研究表明，镉毒性对土壤性质产生负面影响，降低地上部和根部生物量，降低叶绿素含量，并提高氧化应激水平。相反，与对照相比，P、PSB和BC的联合使用显著改善了土壤性质，使有机质增加了175.94%，速效钾增加了87.2%，速效磷增加了306.93%。这种组合还改善了玉米的生长指标，地上部干生物量增加了92.98%，根干生物量增加了110.33%，叶绿素a增加了28.20%，叶绿素b增加了108.34%，总叶绿素增加了37.17%。值得注意的是，与对照组相比，该处理使玉米叶片中的镉浓度降低了61.08%，同时土壤镉含量增加了31.12%。总体而言，P-BC-PSB的协同效应是减轻污染土壤中镉毒性的一种生态友好策略。然而，需要进一步研究以探索其对其他作物的影响及其分子机制。
