摘要
为降低卷丹百合镉含量,以生物炭、生石灰和蛇纹石为钝化材料,通过盆栽试验,探究钝化剂对土壤和卷丹百合不同器官镉含量的影响,并对相关生理指标进行检测。结果表明,3种钝化剂使土壤镉含量分别降低了11.8%、33.0%、17.1%,有效态镉降低了13.3%、26.7%、13.3%,pH分别提高了0.32、0.48、0.43。根、鳞茎、地上茎、叶、花镉含量在添加生物炭的情况下分别降低了8%、22%、15%、24%、2%,在添加生石灰的情况下分别降低了25%、30%、29%、34%、22%,在添加蛇纹石的情况下分别降低了19%、26%、16%、32%、26%。此外,3种钝化剂使丙二醛的含量分别降低了32.60%、51.20%、34.09%,脯氨酸含量分别降低了8.32%、16.76%、10.5%,过氧化氢酶活性分别增加了9.83%、18.12%、10.76%,超氧化物歧化酶活性分别增加了17.37%、38.76%、18.78%,过氧化物酶活性分别增加了9.42%、23.62%、10.68%。研究表明,3种钝化剂都能有效降低土壤和卷丹百合各器官的镉含量,提高植株抗镉胁迫能力,综合考虑生石灰的降镉效果最好。
In order to reduce the cadmium content of Lilium lancifolium,biochar,quicklime and serpentine were used as passivators,to explore the effects of different passivators on cadmium content in soil and organs of L.lancifolium,and the related physiological indexes through pot experiments.The results showed that cadmium content in soil decreased by 11.8%,33.0%and 17.1%,respectively,under the application of the 3 passivators,available cadmium content decreased by 13.3%,26.7%and 13.3%,respectively,and pH increased by 0.32,0.48 and 0.43,respectively.The cadmium content in roots,bulbs,stems,leaves and flowers decreased by 8%,22%,15%,24%and 2%with biochar addition,25%,30%,29%,34%and 22%with quicklime addition,and 19%,26%,16%,32%and 26%with serpentine addition,respectively.In addition,the 3 passivators decreased malondialdehyde content by 32.60%、51.20%and 34.09%,and proline content by 8.32%,16.76%and 10.5%,respectively,and increased catalase activity by 9.83%,18.12%and 10.76%,superoxide dismutase activity by 17.37%,38.76%and 18.78%,and peroxidase activity by 9.42%,23.62%and 10.68%,respectively.The results demonstrated that all of the 3 passivators could effectively reduce the cadmium content in soil and organs of L.lancifolium,and enhance the ability of plant to resist cadmium stress.On the whole,quicklime has the superior performance on reducing cadmium.
作者
雷星宇
胡瑶
邓钢桥
李宏告
张跃龙
胡蝶
李丽辉
LEI Xingyu;HU Yao;DENG Gangqiao;LI Honggao;ZHANG Yuelong;HU Die;LI Lihui(Institute of Nuclear Agriculture Science and Space Breeding,Hunan Academy of Agricultural Sciences,Changsha 430125)
出处
《中国农学通报》
2022年第19期66-72,共7页
Chinese Agricultural Science Bulletin
基金
湖南省农业科技创新项目“药用百合辐射诱变效应的研究”(2020CX45-3)。
关键词
土壤重金属修复
钝化剂
卷丹百合
镉含量
生理特性
soil heavy metal remediation
passivator
Lilium lancifolium
cadmium content
physiological characteristics
