摘要
本文利用盆栽试验研究了不同N源对油菜Cd吸收积累的影响。结果表明:施加NH_(4)^(+)-N后,油菜地上部和根系Cd含量及富集系数均较对照显著增加,油菜根际pH和根际总Cd含量均较对照显著降低,油菜根际可交换态Cd含量较对照显著提高,而碳酸盐结合态和铁锰结合态等难溶态Cd含量均较对照下降,根际pH的降低可使根际难溶态Cd转变成可交换态Cd,进而可增加根系对Cd的吸收积累。而NO_(3)^(-)N处理后,Cd含量减少,根际pH和总Cd含量增加,可交换态Cd含量较对照降低,而碳酸盐结合态和铁锰结合态较对照升高,且差异不显著。
The greenhouse pot experiment was adopted to discern the effects of different nitrogen sources on cadmium uptake and accumulation by rape.The results showed that after applying NH_(4)^(+)-N,the Cd content and enrichment coefficient in the aboveground and root parts of rapeseed increased significantly compared to the control.The pH and total Cd content in the rhizosphere of rapeseed decreased significantly compared to the control.The exchangeable Cd content in the rhizosphere of rapeseed increased significantly compared to the control,while the content of insoluble Cd such as carbonate bound and iron manganese bound decreased compared to the control.The decrease in rhizosphere pH could transform insoluble Cd in the rhizosphere into exchangeable Cd,thereby increasing the absorption and accumulation of Cd by the roots.After NO_(3)^(-)N treatment,the Cd content decreased,the rhizosphere pH and total Cd content increased,and the exchangeable Cd content decreased compared to the control.However,the carbonate bound and iron manganese bound states increased compared to the control,and the difference was not significant.
作者
边子涵
付欣萍
何奕萱
赵晨曦
周丽洪
储童
陈永亮
BIAN Zihan;FU Xinping;HE Yixuan;ZHAO Chenxi;ZHOU Lihong;CHU Tong;CHEN Yongliang(College of Life Science,Linyi University,Linyi Shandong 276000,China)
出处
《青海农林科技》
2024年第3期17-21,共5页
Science and Technology of Qinghai Agriculture and Forestry
基金
临沂大学创新计划项目(X202310452383)
山东省农业重大应用技术创新项目(60115009)。
关键词
N源
CD吸收
根际PH
CD形态
Nitrogen source
Cadmium absorption
PH in rhizosphere
Cadmium morphology
