| 草甘膦和根瘤菌对紫花苜蓿品质及固氮能力的影响 |
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| 引用本文： | 程波,王健,石红标,张慧敏,张瑞强,甄超,翟波.草甘膦和根瘤菌对紫花苜蓿品质及固氮能力的影响[J].中国草地学报,2021(2). |
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| 作者姓名： | 程波 王健 石红标 张慧敏 张瑞强 甄超 翟波 |
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| 作者单位： | 水利部牧区水利科学研究所;乌拉特前旗自然资源管理局;内蒙古农业大学沙漠治理学院;杭锦旗农牧和水务综合执法局 |
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| 基金项目： | 内蒙古科技计划项目(21705004);中国水科院科研专项(MK2017J05)资助。 |
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| 摘 要： | 以常用的紫花苜蓿(Medicago sativa)品种金皇后为材料,种植前土壤喷洒不同浓度的草甘膦溶液(0ml/L、0.6ml/L、3ml/L及6ml/L)模拟有草甘膦使用史的耕地。60d后测定金皇后地上部分鲜重、茎粗、株高、根鲜重、根长、根瘤数、结瘤率、含氮量、叶绿素含量和丙二醛含量,反映土壤中不同草甘膦残留量对金皇后品质与固氮效果的影响。结果表明:不同浓度草甘膦对金皇后的生长和固氮效果都有抑制作用,且抑制效果随着草甘膦浓度的升高而加强。与对照组相比,0.6ml/L的草甘膦对金皇后的影响较小,而当草甘膦浓度达到6ml/L时,金皇后单株地上部分鲜重减少4.36g(减产率44.00%),结瘤率减少91.67%,植株含氮量减少3.06%,此外其他生长生理指标也发生了不同程度的抑制。研究还发现在对照组和0.6ml/L草甘膦组接种根瘤菌可以提高金皇后的地上部分鲜重、株高、根鲜重和植株含氮量。
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| 关 键 词： | 紫花苜蓿 草甘膦 根瘤菌 农药残留 |
Effects of Glyphosate and Rhizobium on the Quality Traits and Nitrogen Fixation of Medicago sativa |
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| CHENG Bo,WANG Jian,SHI Hong-biao,ZHANG Hui-min,ZHANG Rui-qiang,ZHEN Chao,ZHAI Bo.Effects of Glyphosate and Rhizobium on the Quality Traits and Nitrogen Fixation of Medicago sativa[J].Chinese Journal of Grassland,2021(2). |
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| Authors: | CHENG Bo WANG Jian SHI Hong-biao ZHANG Hui-min ZHANG Rui-qiang ZHEN Chao ZHAI Bo |
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| Institution: | (Institute of Water Resources Science of Pasturing Area of the Ministry of Water Resources,Hohhot 010020,China;Urad Front Banner Natural Resources Administration,Bayannaoer 014400,China;College of Desert Control Science and Engineering,Inner Mongolia Agricultural University,Hohhot 010018,China;Hangjin Banner Comprehensive Law Enforcement Bureau,Ordos 017400,China) |
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| Abstract: | The common alfalfa variety,Golden Empress,was used as the research material in the present study.Before planting,the soil was sprayed with different concentrations of glyphosate solution(0 ml/L,0.6 ml/L,3 ml/L,6 ml/L)to simulate the cultivated land with the history of glyphosate use.After 60 days,the aboveground fresh weight,stem diameter,plant height,root fresh weight,root length,nodule number,nodulation rate,and nitrogen,chlorophyll and malondialdehyde contents were determined to reflect the effects of different concentrations of glyphosate residue on quality traits and nitrogen fixation of Golden Empress.The results showed that different concentrations of glyphosate inhibited the growth and nitrogen fixation of Golden Empress,and the inhibitory effect was strengthened with the increase of glyphosate concentration.Compared with the control group,0.6 ml/L glyphosate had less effect on Golden Empress.When the concentration of glyphosate reached 6 ml/L,the aboveground fresh weight of single Golden Empress was decreased by 4.36 g(yield reduction rate:44.00%),nodulation rate was decreased by 91.67%,and nitrogen content was decreased by 3.06%.In addition,other growth and physiological parameters were also inhibited.Furthermore,the aboveground fresh weight,plant height,root fresh weight and nitrogen content of plants were found to be increased in control group and 0.6ml/L glyphosate group. |
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| Keywords: | Medicago sativa Glyphosate Rhizobium Pesticide residues |
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