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Effects of Different Habitats and Seasons on Arbuscular Mycorrhizal Fungi in Rhizosphere of Citrus grandis cv.Changshou Shatian You
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- Author:
- No author available
- Journal Title:
- Chinese Journal of Applied & Environmental Biology
- Issue:
- 5
- DOI:
- 10.3724/SP.J.1145.2011.00684
- Key Word:
- AM真菌;沙田柚;生境;季节变化;侵染率;孢子密度
Abstract： 以山地长寿沙田柚成年果树为对象,研究不同生境和季节对丛枝菌根(Arbuscularmycorrhiza,AM)真菌侵染以及根围土壤中AM真菌孢子密度的影响.试验结果表明,不同生境下,菌根侵染率和AM真菌孢子密度都是以梯田最高,坡地次之,洼地最低；在坡地和洼地生境下,生草区均高于清耕区.两块试验地AM真菌的菌丝侵染率均为夏季最高(16.8%±1.9％和16.0％±1.8％),秋季次之,冬季最低；丛枝和泡囊的形成电是夏/秋季较高,春/冬季较低；而根围土壤中AM真菌孢子密度则是秋季最高[(159±19)个/100 g和(167±17)个/100 g],夏季次之,冬季最低.总之,对于长寿沙田柚成年果树,AM真菌的菌根侵染率在夏季梯田最高,根围土壤中的AM真菌孢子密度在秋季梯田最高；在坡地和洼地生境中,生草处理均可显著提高菌根侵染率和AM真菌孢子密度.图4参27
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