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[修改和草回报对土壤和大米Cd含量的影响在米/菜旋转系统中]

Qiang Xu¹, Bao-Jia Yang², Zhi-Qi Li³

¹College of Resources and Environment, Southwest University, Chongqing 400715, China.

Huan jing ke xue= Huanjing kexue

|March 14, 2026

概括

将草回归与生物炭等土壤修改物相结合,可以显著改善土壤的酸性质和作物产量,同时减少大米中 (Cd) 的吸收. 生物炭的应用显示出对土壤健康和重金属修复的最全面的益处.

科学领域:

农业科学农业科学
环境科学环境科学
土壤科学土壤科学

背景情况:

酸性紫色土壤对农业和重金属整治构成挑战.
米/菜轮换系统是常见的,但土壤健康和污染是令人担忧的.

研究的目的:

研究酸性土壤修改和草回收对土壤特性和大米中的 (Cd) 含量的协同效应.
为改善酸性紫色土壤和重金属污染补救提供科学基础.

主要方法:

使用六种处理方法进行实地实验:不施肥 (CK),NPK (F),NPK + 草回报 (FT),NPK + 酸肥料 + 草回报 (FGT),NPK + 石灰粉 + 草回报 (FST),NPK + 生物炭 + 草回报 (FBT).
评估作物产量,土壤有机物 (SOM),pH,总Cd,可用的Cd (DTPA-Cd) 和大米组织中的Cd含量 (草,皮,谷物).

主要成果:

与修改 (FGT,FST,FBT) 结合应用回报,与单独的NPK相比,显著增加了SOM和土壤pH.
FBT处理 (生物炭+草回收) 在SOM和菜产量方面显示出最显著的改善,而FST提高了大米产量.
FGT,FST和FBT处理减少了总和可用的土壤Cd,FBT显著降低了44.2%的米粒中的Cd含量.

结论:

草回收与土壤修改的联合应用有效地改善了土壤特性,作物产量,并减少了酸性紫色土壤中的Cd污染.
生物炭与草回收 (FBT) 结合,在米/菜轮换系统中显示出对土壤健康和补救的最全面的益处.
在SOM和各种Cd分数之间发现了显著的负相关性,突出显示了SOM在缓解Cd污染方面的作用.

关键词:

修改修正修正修正修正修正生物炭是一种生物炭.(Cd) 的使用丰富因子是一种丰富因子.大米/大麻的轮换草回报草回报草回报转移因子转移因子

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