To investigate the dynamic effects of organic fertilizer application on the agronomic traits of rice (Oryza sativa L.), soil physicochemical properties and soil Cd activity under excess cadmium (Cd) exposure, this study was conducted to simulate a paddy system under different organic fertilizer application rates using exogenous spiked Cd soil as the test soil and conducting a rice pot experiment. The obtained results showed that the application of organic fertilizer increased the number of rice tillers, rice plant height, total grain number and total grain weight at maturity in all treated soils, while it decreased the concentration of Cd in brown rice. The application of organic fertilizer increased the organic matter (OM), redox potential and electrical conductivity of all treated soils but decreased the pH and TCLP-extractable Cd of all treated soils. There was a significant or highly significant negative correlation (p < 0.05 or p < 0.01) between soil TCLP-extractable Cd and soil OM throughout the experimental period, implying that soil OM may be an important factor influencing the changes in Cd activity in soil. In addition, our experiment also examined in detail the dynamic change process of the abovementioned indicators throughout the experimental period and observed that the dynamic change process of soil Cd activity could be described as a trend of first decreasing and then gradually increasing throughout the rice reproductive period.

有机肥施用对水稻农艺性状的动态影响研究L.)、过量镉（Cd）暴露下土壤理化性质和土壤Cd活性，本研究以外源加标Cd土壤为试验土，模拟不同有机肥施用量下的稻田系统，并进行了水稻盆栽试验。结果表明，施用有机肥增加了各处理土壤水稻分蘖数、水稻株高、总粒数和成熟粒重，同时降低了糙米中Cd的浓度。施用有机肥增加了所有处理土壤的有机质（OM）、氧化还原电位和电导率，但降低了所有处理土壤的pH值和TCLP可提取的Cd。显着或极显着负相关（p < 0.05 或p  < 0.01) 在整个实验期间土壤 TCLP 可提取 Cd 与土壤 OM 之间的差异，表明土壤 OM 可能是影响土壤中 Cd 活性变化的重要因素。此外，我们的试验还详细考察了上述指标在整个试验期内的动态变化过程，观察到整个水稻生育期土壤Cd活性的动态变化过程可以描述为先下降后逐渐上升的趋势。 .