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首页> 外文期刊>Plant and Soil >Effects of soil compaction on the microbial populations of melon and maize rhizoplane.
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Effects of soil compaction on the microbial populations of melon and maize rhizoplane.

机译：土壤压实对甜瓜和玉米根际微生物种群的影响。

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摘要

The numbers of culturable bacteria and fluorescent pseudomonads on the rhizoplanes of melons cv. Amus and maize were higher when plants were grown in more compacted soil and the relative increase was larger for fluorescent pseudomonads. Total bacterial counts, however, did not appear to be affected by soil compaction. The determination of extracellular enzymatic properties (pectinase, alpha-glucosidase, beta-glucosidase and alpha-galactosidase) of isolates from bulk soil and root samples suggestedthat the microbial populations on the rhizoplane, especially when plants were grown in highly compacted soil, were composed of high ratios of bacteria with abilities to utilize root exudates efficiently. The microbial community structure estimated from the colony-forming curves of bulk soil and root samples suggested that the microbial populations on the rhizoplane, especially when plants were grown in compacted soil, were likely to be composed of more r-strategists which were defined as those which formed colonies within 2 days.
机译：甜瓜简历的根际平面上可培养细菌和荧光假单胞菌的数量。当植物生长在较密实的土壤中时，草木和玉米较高，而荧光假单胞菌的相对增加较大。然而，细菌总数似乎并未受到土壤压实的影响。对散装土壤和根样品中分离物的细胞外酶学性质（果胶酶，α-葡萄糖苷酶，β-葡萄糖苷酶和α-半乳糖苷酶）的测定表明，根际平面上的微生物种群，特别是当植物在高度压实的土壤中生长时，由以下组成：高比率细菌具有有效利用根系分泌物的能力。根据散装土壤和根样品的菌落形成曲线估计的微生物群落结构表明，根际平面上的微生物种群，特别是当植物在压实土壤中生长时，可能由更多的r-战略家组成，它们被定义为那些在2天内形成菌落。

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