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Rhodobacter capsulata(ATCC 23702)菌体进入土壤后,土壤pH值下降,菌体释放出的NH_4~+-N在土壤中不积累,迅速转变成NO_3~--N形式,后者在土壤中的累积量与加入的菌体量呈正比,土壤有机氮含量略有升高。在每公斤土壤中加入0.5克菌体时,土壤的呼吸作用在5周后达到平衡状态。玉米幼株的盆栽试验结果表明,R.capsulata菌液不仅在植株干重上,而且在植物的含氮量上,都比其它处理提高显著。R.capsulata菌体有可能作为植物生长的附加氮肥。
Rhodobacter capsulata (ATCC 23702) bacteria enter the soil, soil pH decreased, the bacteria released NH_4 ~ + -N does not accumulate in the soil, rapidly transformed into the NO_3 ~ - N form, the latter in the soil accumulation The amount of bacteria added was proportional to the amount of soil organic nitrogen slightly increased. When 0.5 g of bacteria were added per kg of soil, soil respiration reached equilibrium after 5 weeks. The results of pot experiment in young maize showed that R.capsulata was significantly higher than other treatments not only on the plant dry weight but also on the plant nitrogen content. The R. capsulata cell may be used as an additional nitrogen fertilizer for plant growth.