期刊论文

Zhou, Hang(zhouhang4607@163.com)

中文

环境科学

0250-3301

2022

43

6

3308-3314

10.13227/j.hjkx.202110118

湖南省自然科学基金项目（2021JJ31159）； 湖南省重点研发计划项目（2021NK2027）； 湖南省科技人才托举工程项目（2019TJ-N05）；

本校为第一机构

磷(P)是作物生长的必需营养元素,Cd污染耕地中P盈亏对水稻Cd吸收转运的影响和效应还不清晰.通过水培试验施加不同水平的P(NaH_2PO_4),研究Cd胁迫下,缺P(1.5 ~ 6.0 mg·L~(-1),以P元素计,同下)和富P(12.0 ~ 48.0 mg·L~(-1) )对水稻Cd吸收、转运和累积的影响.结果表明:① Cd胁迫下,ρ(P)的增加(1.5 ~ 48.0 mg·L~(-1) ),水稻生物量无明显变化,叶片光合色素(叶绿素a、叶绿素b和类胡萝卜素)的含量先上升后下降,高浓度的P抑制光合色素的合成; ②在缺P和富P条件下,随着P浓度的提高,水稻各部位Cd的含量增加,尤其是糙米中Cd含量分别显著增加132.1%和191.2%; ③糙米的P/Cd比值在缺P和富P下呈现分段减少规...

Phosphorus(P)is an essential nutrient element for crop growth.The effects of P surplus or deficit on Cd absorption and transport in rice in Cd-polluted farmland is not clear.The effects of P deficiency and P sufficiency on Cd uptake,transport,and accumulation in rice under Cd stress were investigated by applying different levels of phosphorus(NaH2PO4)in a hydroponic experiment.The results showed that:①with the increase inρ(P)(1.5-48.0 mg·L-1),the biomass in all parts of the rice plants had no obvious change,and the contents of photosynthetic...