摘要
以杂交狼尾草、甜象草、皇竹草和苏丹草为材料,探讨硅藻土、木炭和木炭+硅藻土等3种改良剂施用后电解锰渣基质上4种能源草种子萌发和幼苗生长规律。结果表明:4种能源草在电解锰渣基质上的发芽率大小顺序为甜象草>杂交狼尾草>苏丹草>皇竹草。3种改良剂均能明显提高皇竹草的发芽率、发芽势和发芽指数,硅藻土与木炭的混合施用组使苏丹草的发芽势和发芽指数与对照相比也有明显提升(P<0.05)。改良剂的添加还促进了能源草幼苗的生长,与对照相比,杂交狼尾草、甜象草、皇竹草和苏丹草的地上部单株鲜重最大增幅分别达36.54%、7.69%、35.71%和23.88%。同时,施用改良剂还提高了能源草的叶绿素含量和抗氧化酶(超氧化物歧化酶、过氧化物酶、过氧化氢酶)活性,降低了叶片丙二醛(MDA)含量。综合各项发芽指标、生长指标和生理指标,在电解锰渣上最适宜种植的是甜象草,以2.5%的木炭和2.5%的硅藻土混合施用改良效果最优;其次是杂交狼尾草,以5%硅藻土的单独施用改良效果最优。
This research investigated seed germination and seedling growth of four species of bioenergy grass(Pennisetum americanum×Pennisetum purpureum,Pennisetum purpureum,Pennisetum hydridum and Sorghum sudanense),grown on electrolytic manganese residue(control)or electrolytic manganese residue after adding one of three amendments(5%diatomite,5%charcoal or 2.5%charcoal+2.5%diatomite).Germination percentage for the four bioenergy grasses ranked:P.purpureum>P.americanum×P.purpureum>S.sudanense>P.hydridum.The three amendments all significantly improved the germination percentage,germination energy and germination index of P.hydridum,and for the other three grasses the germination energy and germination index in the mixed amendment treatment of diatomite and charcoal were also significantly higher than those of the control group(P<0.05).Compared with the control group,in the amendment treatments,the fresh weights of P.americanum×P.purpureum,P.purpureum,P.hydridum and S.sudanense were increased by 36.54%,7.69%,35.71%and 23.88%,respectively.Amendment application also enhanced chlorophyll content and the activities of antioxidant enzymes(superoxide dismutase,peroxidase,catalase),while the malondialdehyde content of leaves was decreased.Based on the germination,growth and physiological parameters,for the tested bioenergy grasses grown on the electrolytic manganese residue,P.purpureum with 2.5%charcoal and 2.5%diatomite amendment performed best,followed by P.americanum×P.purpureum with 5%diatomite amendment.
作者
罗洋
刘方
任军
朱健
LUO Yang;LIU Fang;REN Jun;ZHU Jian(College of Resource and Environmental Engineering,Guizhou University,Guiyang 550025,China;School of Geography and Resources,Guizhou Education University,Guiyang 550018,China)
出处
《草业学报》
CSCD
北大核心
2020年第11期118-128,共11页
Acta Prataculturae Sinica
基金
国家自然科学基金委员会-贵州省人民政府喀斯特科学研究中心项目(U1612442-3)
国家自然科学基金项目(41661094)
贵州省科技计划项目(黔科合基础[2019]1247号)资助。
关键词
电解锰渣
能源草
发芽
改良剂
electrolytic manganese residue
energy grass
germination
amendment
