摘要
【目的】研究生石灰—丛枝菌根真菌(arbuscular mycorrhizal fungi,AMF)—草本植物协同作用对酸性锡尾矿的改良效应,筛选酸性锡尾矿适生优势植物。【方法】采用盆栽试验研究生石灰与AMF混合菌剂对锡尾矿上黄茅[Heteropogon contortus(L.)Beauv.]、香根草[Chrysopogon zizanioides(L.)Roberty]、狗牙根[Cynodon dactylon(L.)Pers.]、苜蓿(Medicago sativa L.)、狗尾草[Setaria viridis(L.)Beauv.]和黑麦草(Lolium perenne L.)生长、重金属累积和根际主要理化性状的影响。【结果】与对照处理相比,添加生石灰—AMF可提高尾矿pH值、有机质和速效养分含量,且显著增加6种草本植物生物量,尤以黑麦草增加最多。所有复合处理中,生石灰处理下黄茅根际尾矿pH值最高,较改良前提高了0.92;生石灰—AMF处理下,香根草根际尾矿有机质含量较高,较改良前提高了7.6倍;苜蓿和黑麦草根际尾矿碱解氮和速效磷含量相对较高,分别较改良前提高约14倍和21倍。生石灰—AMF—草本植物组合可有效降低根际尾矿有效态Cu、Pb含量,分别降低了15.66~17.07和1.43~1.48 mg/kg,而仅有生石灰—AMF—狗尾草或黑麦草组合可有效降低有效态Cd含量,降低了0.58~0.59 mg/kg。【结论】生石灰—AMF—草本植物协同有助于锡尾矿的改良。在生石灰—AMF组合改良下,建议推荐黑麦草、黄茅、香根草和苜蓿为酸性锡尾矿植被恢复的先锋植物。
[Purpose]To study the synergistic improvement effects of the quicklime-arbuscular mycorrhizal fungi(AMF)-herbs on the acid tin tailings,selecting the suitable dominant plants for the improvement.[Methods]A pot experiment was used to study the effects of quicklime and AMF on the growth of plant,accumulation of heavy metal,and rhizosphere physicochemical properties of Heteropogon contortus(L.)Beauv.,Chrysopogon zizanioides(L.)Roberty,Cynodon dactylon(L.)Pers.,Medicago sativa L.,Setaria viridis(L.)Beauv.,Lolium perenne L.on tin tailings.[Results]Compared with the control treatment,complex addition of quicklime and AMF increased the pH value,organic matter and available nutrient contents of tailings,and significantly increased the biomass of six herbaceous plants,especially the increase of biomass for L.perenne was most.Among complex treatments,under quicklime treatment,the pH value of H.contortus rhizosphere soil was the highest,increased by 0.92 comparing with the test tailing before improvement;under the quicklime-AMF treatment,the organic matter content of C.zizanioides rhizosphere soil was the highest,increased by 7.6 times comparing with the test tailing before improvement,and the content of alkali-hydrolyzed nitrogen and available phosphorus in M.sativa and L.perenne rhizosphere soil was relatively high,increased by about 14 times and 21 times comparing with the test tailing before improvement,respectively.The combination treatments of quicklime-AMF-herbs had a more reduction of available Cu and Pb content in the rhizosphere tailings,reduced by 15.66-17.07 and 1.43-1.48 mg/kg,respectively;but for the available Cd,reduced by 0.58-0.59 mg/kg only under the treatment of quicklime-AMF-S.viridis or L.perenne.[Conclusion]Quicklime-AMF-herbs can help to improve the tin tailings.L.perenne,H.contortus,C.zizanioides and M.sativa are recommended as pioneer plants for vegetation restoration in tin tailings under the combination of quicklime-AMF.
作者
邓琪
包立
秦芙蓉
吴慧
夏云霓
岳献荣
夏运生
DENG Qi;BAO Li;QIN Furong;WU Hui;XIA Yunni;YUE Xianrong;XIA Yunsheng(College of Resources and Environment,Yunnan Agricultural University,Kunming 650201,China;Yunnan Research Center of Soil Fertility and Pollution Remediation,Kunming 650201,China;Light Alloy Research Institute,Central South University,Changsha 410083,China;College of Marxism,Yunnan Agricultural University,Kunming 650201,China)
出处
《云南农业大学学报（自然科学版）》
CAS
CSCD
北大核心
2024年第1期168-174,共7页
Journal of Yunnan Agricultural University:Natural Science
基金
国家重点研发计划项目(2018YFC1802603)
云南省科技人才与平台计划项目(202405AM340004)。
