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硅酸盐细菌的生物效应和根际效应

Keywords: 硅酸盐细菌,发芽率,株高,根际效应

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Abstract:

通过土培和水培试验,探讨了硅酸盐细菌的生物效应和根际效应。结果表明,当硅酸盐细菌的处理浓度在0~250g·L-1浓度范围内时,对小麦种子的发芽率几乎无影响。在0~2g·L-1浓度内,促进小麦苗和根的生长,以2g·L-1浓度对小麦苗和根的促生效果最佳;浓度为2~250g·L-1时,生长促进作用逐渐减弱直至抑制小麦的生长。硅酸盐细菌也能促进玉米苗的生长,对玉米根的促生效果优于地上部。硅酸盐细菌处理的小麦根际pH和速效P含量明显低于对照,而速效K则高于对照。

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