项目编号:32460468项目主持人:杜含梅,女,四川金堂人,四川农业大学理学博士,四川农业大学与澳大利亚联邦科学与工业研究组织联合培养博士(2018年11月一2020年3月),西昌学院攀西特色作物改良四川省重点实验室副教授。主持国家自然科学基...项目编号:32460468项目主持人:杜含梅,女,四川金堂人,四川农业大学理学博士,四川农业大学与澳大利亚联邦科学与工业研究组织联合培养博士(2018年11月一2020年3月),西昌学院攀西特色作物改良四川省重点实验室副教授。主持国家自然科学基金1项、厅州级科研项目2项,参与各类科研项目10余项;在《Plant Sciencee》《Frontiers in Plant Science》等国内外期刊上发表学术论文10余篇。展开更多
It is important to reduce Cd and As content in brown rice in contaminated paddy soils.We conducted research on the effects of rice husk ash (RHA) on the Cd and As in the rhizosphere microenvironment (soil,porewater,an...It is important to reduce Cd and As content in brown rice in contaminated paddy soils.We conducted research on the effects of rice husk ash (RHA) on the Cd and As in the rhizosphere microenvironment (soil,porewater,and iron plaque) and measured the Cd,As,and Si content in rice plants.The main elements in RHA were Si (29.64%) and O (69.17%),which had the maximum adsorption capacity for Cd was 42.49 mg/kg and for As was 18.62 mg/kg.Soil pH and available Si content increased,while soil available Cd and As decreased following application of 0.5%–2%RHA.RHA promote the transformation of Cd to insoluble fraction,while As was transformed from a poorly soluble form to a more active one.RHA reduced Cd content and increased Si content in porewater,and reduced As only at the later rice growth stages.RHA increased the amount of iron plaque,thereby decreasing the Cd content in iron plaque,while increased the As content in it.Cd and inorganic As content in brown rice were decreased,to 0.31 mg/kg and 0.18 mg/kg,respectively.The decrease of Cd in brown rice was due to the decrease of Cd mobility in soil,thereby reducing root accumulation,while the decrease of As in brown rice was affected by the transport from roots to stems.Therefore,RHA can be considered as a safe and efficient in-situ remediation amendment for Cd and As co-contaminated paddy soil.展开更多
文摘项目编号:32460468项目主持人:杜含梅,女,四川金堂人,四川农业大学理学博士,四川农业大学与澳大利亚联邦科学与工业研究组织联合培养博士(2018年11月一2020年3月),西昌学院攀西特色作物改良四川省重点实验室副教授。主持国家自然科学基金1项、厅州级科研项目2项,参与各类科研项目10余项;在《Plant Sciencee》《Frontiers in Plant Science》等国内外期刊上发表学术论文10余篇。
基金supported by the National Natural Science Foundation of China (No.41907126)the Key Research and Development Program of Hunan Province (No.2021NK2027)the Science and Technology Talent Lifting Project of Hunan Province (No.2019TJ-N05)。
文摘It is important to reduce Cd and As content in brown rice in contaminated paddy soils.We conducted research on the effects of rice husk ash (RHA) on the Cd and As in the rhizosphere microenvironment (soil,porewater,and iron plaque) and measured the Cd,As,and Si content in rice plants.The main elements in RHA were Si (29.64%) and O (69.17%),which had the maximum adsorption capacity for Cd was 42.49 mg/kg and for As was 18.62 mg/kg.Soil pH and available Si content increased,while soil available Cd and As decreased following application of 0.5%–2%RHA.RHA promote the transformation of Cd to insoluble fraction,while As was transformed from a poorly soluble form to a more active one.RHA reduced Cd content and increased Si content in porewater,and reduced As only at the later rice growth stages.RHA increased the amount of iron plaque,thereby decreasing the Cd content in iron plaque,while increased the As content in it.Cd and inorganic As content in brown rice were decreased,to 0.31 mg/kg and 0.18 mg/kg,respectively.The decrease of Cd in brown rice was due to the decrease of Cd mobility in soil,thereby reducing root accumulation,while the decrease of As in brown rice was affected by the transport from roots to stems.Therefore,RHA can be considered as a safe and efficient in-situ remediation amendment for Cd and As co-contaminated paddy soil.
