The effect of soil fumigation on microbial recolonization and mycorrhizal infection
The effect of soil fumigation on microbial recolonization and mycorrhizal infection
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土壤熏蒸对微生物再定殖和菌根感染的影响
DOI：
10.1016/0038-0717(72)90025-9
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发表时间：
1972
影响因子：
9.7
通讯作者：
C. Theodorou
中科院分区：
文献类型：
--
作者：
E. Ridge;C. Theodorou
两种森林苗圃土壤用甲基溴或Basamid熏蒸均可显著减少真菌数量。真菌重新定殖迅速，但在熏蒸后7个月仍未达到原有数量。在未经处理的土壤中未检测到的一些真菌在熏蒸后的土壤中定植。对照土壤中松树幼苗根系的真菌种类和个体数量均高于处理土壤。经种子接种的菌根真菌对根的侵染作用在一个部位增加，而在另一个部位没有增加。在熏蒸土壤中，需氧细菌的数量起初减少，但迅速增加到对照土壤的10倍。达科美对细菌的作用比甲基溴更持久。经甲基溴处理的土壤中荧光假单胞菌的计数在最初下降后迅速上升，占总有氧计数的78%，然后缓慢下降。最初，甲基溴可使细菌孢子数量减少50 - 90%，但dazomet不能。甲基溴在两种土壤中的施用效果不同。
The fungal populations of two forest nursery soils were greatly reduced by fumigation with methyl bromide or dazomet (Basamid). Fungal recolonization was rapid, but original numbers were not attained even 7 months after fumigation. Some fungi not detected in untreated soil colonized the fumigated soil. Seedling pine roots were always colonized by larger numbers of fungal species and individuals in control than in treated soil. Infection of roots by a seedinoculated mycorrhizal fungus was increased by fumigation at one site but not at the other.Aerobic bacteria in fumigated soils were initially reduced in number but rapidly rose to 10 times that of control soil. Dazomet had a more persistent effect on bacteria than did methyl bromide. Counts of fluorescent pseudomonads from soils treated with methyl bromide, after an initial fall, rose quickly to constitute up to 78 per cent of the total aerobic count, then slowly declined. Bacterial spore numbers were initially reduced 50–90 per cent by methyl bromide but not by dazomet. The effectiveness of methyl bromide differed in the two soils.