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园艺学报 ›› 2015, Vol. 42 ›› Issue (1): 131-139.doi: 10.16420/j.issn.0513-353x.2014-0707

• 研究报告 • 上一篇    下一篇

连作土壤中残根对平邑甜茶幼苗生物量及土壤酚酸类物质和微生物的影响

孙步蕾,王艳芳,张先富,沈向,陈学森,毛志泉   

  1. 1山东农业大学园艺科学与工程学院,作物生物学国家重点实验室,山东泰安 271018;2山东农业大学化学与材料科学学院,山东泰安 271018
  • 出版日期:2015-01-25 发布日期:2015-01-25
  • 基金资助:

    现代农业产业技术体系建设专项资金项目(CARS-28);教育部长江学者和创新团队发展计划项目(IRT1155)

Effect of Residual Roots on the Biomass of Malus hupehensis Seedlings,Phenolic Acids and Microbiology in the Soil of Continuous Cropping

SUN Bu-lei,WANG Yan-fang,ZHANG Xian-fu,SHEN Xiang,CHEN Xue-sen,and MAO Zhi-quan   

  1. 1State Key Laboratory of Crop Biology,College of Horticultural Science and Engineering,Shandong Agricultural University,Tai’an,Shandong 271018,China;2 College of Chemistry and Material Science,Shandong Agricultural University,Tai’an,Shandong 271018,China
  • Online:2015-01-25 Published:2015-01-25

摘要: 以平邑甜茶为试材进行连作土壤盆栽试验,研究在连作土壤中添加不同量的残根对幼苗生长和土壤环境的影响。结果表明连作土壤中添加0.3%的残根可提高平邑甜茶幼苗的生物量,当残根添加量为0.6% ~ 2.4%时,则对幼苗生长有抑制作用;残根的加入也改变了土壤微生物的数量,与对照相比,0.6%、1.2%和2.4%处理使细菌总量分别减少19.36%、30.78%和39.6%,但放线菌和真菌数量明显增加;连作土壤中施入残根,显著增加了土壤中酚酸类物质的含量,0.6%、1.2%和2.4%使春季酚酸类物质总含量,分别增加57.49%、116.20%和131.71%,秋季分别增加29.03%、49.65%和70.27%;另外,残根的施入也影响了土壤酶活性,0.6%、1.2%和2.4%使土壤脲酶、蔗糖酶活性都有不同程度的降低,但中性磷酸酶活性有所升高。由此可见,连作土壤中残根含量对平邑甜茶幼苗的影响存在低促高抑的现象,当残根施入量大于0.3%后,则抑制幼苗生长,加重了连作障碍程度。

关键词: 平邑甜茶, 残根, 连作障碍, 微生物, 土壤酶活性, 酚酸类物质

Abstract: Malus hupehensis Rehd. seedlings were planted in pot and residual roots were added to pots filled with replant soil at four rates(w/w):0,0.3%,0.6%,1.2% and 2.4%. The effects of residual roots on the biomass of M. hupehensis Rehd. seedlings and soil environment were measured. The results showed that 0.3% increased the biomass of the seedlings,while when the residual roots application was between 0.6%–2.4%,the biomass of seedlings were decreased. The number of soil microorganism were also changed by the residual roots,in spring,compared with the control,the treatments of 0.6%,1.2% and 2.4% decreased the number of bacteria by 19.36%,30.78%,39.6%,respectively,but the numbers of fungi and actinomycetes were increased. The similar trend was observed in summer and autumn. The addition ofresidual roots significantly increased the content of phenolic acids,in spring,the treatments of 0.6%,1.2%,2.4% increased the content of phenolic acids by 57.49%,116.20%,131.718%,respectively. In addition,the treatments of 0.6%,1.2%,2.4% decreased the activities of soil urease and sucrase,and increased the activities of soil neutral phosphatase. These results suggested that the residual roots on the growth of M. hupehensis seedlings depended on the concentrations of its application,lower addition of residual roots could promoted the accumulation of plant biomass,while higher concentration of residual roots led to serious growth inhibition for M. hupehensis seedlings,which was responsible for the continuous cropping obstacle.

Key words: Malus hupehensis, root residue, replant disease;microbe;soil enzyme activity, phenolic acid

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