Schools of Microbiology and Mathematics, The University of New South Wales, Kensington, New South Wales 2033, Australia.
Appl Environ Microbiol. 1987 May;53(5):1125-31. doi: 10.1128/aem.53.5.1125-1131.1987.
Fluctuations in numbers of Rhizobium leguminosarum biovar trifolii and its bacteriophages in two fields with different soil types were followed during a 17-month period in 1981 and 1982. Mean levels of both phage and rhizobia varied significantly (P < 0.05) on different occasions, with rhizobial levels varying from 1.6 x 10 to 2.0 x 10 cell per g of soil and phage from 0 to 1.7 x 10 PFU/g of soil. Multivariate regression analysis showed rhizobial levels to be significantly and positively related to vegetation height and solar radiation, but not to mean temperature, precipitation, soil matric potential, or soil type. Rhizobiophage concentrations were significantly and positively related to soil matric potential and vegetation height. They were reduced in the silty clay loam soil, although the presence of 34% clay did not prevent phage multiplication and the occurrence of high phage levels.
在 1981 年和 1982 年的 17 个月期间，对具有不同土壤类型的两个田间的根瘤菌（根瘤菌属三叶草根瘤亚种）及其噬菌体数量的波动进行了跟踪。在不同的情况下，噬菌体和根瘤菌的平均水平都有显著差异（P<0.05），根瘤菌水平从每克土壤 1.6×10 到 2.0×10 个细胞不等，噬菌体从每克土壤 0 到 1.7×10 PFU/g 不等。多元回归分析表明，根瘤菌水平与植被高度和太阳辐射呈显著正相关，但与平均温度、降水、土壤基质势或土壤类型无关。噬菌体量与土壤基质势和植被高度呈显著正相关。尽管存在 34%的粘土，但它们在粉砂壤土中减少了，并且不会阻止噬菌体的增殖和高噬菌体水平的出现。
