不同树龄苹果园土壤微生物的差异及对苹果砧木生长的影响Rhizosphere microbial community variation of apple orchard soil with different tree age and the effect on replanted apple rootstock
王树桐;梁魁景;王亚南;邹庆甲;曹克强;
摘要(Abstract):
以平顶海棠(Malus robusta Rehd.)为试验材料,以4个不同树龄苹果园的土壤为对象,研究了不同树龄苹果园土壤对再植平顶海棠幼苗生长的影响。结果表明,在前茬树龄为3、8、15和24 a苹果园土种植的平顶海棠幼苗比正茬土对照的平均株高分别减少31.22%、46.38%、57.66%和63.10%;再植平顶海棠幼苗地上部干质量分别减少0.96%、57.58%、76.88%和78.10%;地下部干质量分别减少40.38%、48.79%、64.03%和79.43%。在24 a生苹果树土壤中再植海棠幼苗校正发病率达到了72.73%,而在3 a生苹果树的土壤中再植海棠幼苗校正发病率只有18.18%。对不同树龄的苹果园土壤根际细菌和真菌群落结构的差异进行分析,其结果为,随着苹果树龄的提高,根际土壤中真菌种类和数量显著增加,而细菌的种类和数量则随着树龄的增加显著减少。
关键词(KeyWords): 苹果再植病害;根际微生物;树龄;变性梯度凝胶电泳
基金项目(Foundation): 国家苹果现代产业技术体系(nycytx-08-04-01);; 公益性行业(农业)科研专项(200903004-42)
作者(Author): 王树桐;梁魁景;王亚南;邹庆甲;曹克强;
Email:
DOI: 10.13925/j.cnki.gsxb.2011.03.008
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