磁处理对棕壤固氮菌数量的影响

• 作 者: 程希雷 依艳丽 杜安军 贾振文 栗杰 张大庚 周咏春 樊德祥
• 机 构: 沈阳农业大学土地与环境学院,沈阳农业大学土地与环境学院,铁岭市土肥站,昌图县土肥站,沈阳农业大学土地与环境学院,沈阳农业大学土地与环境学院,沈阳农业大学土地与环境学院,沈阳农业大学土地与环境学院 辽宁
• 出 处: 土壤通报
• 发表日期: 2007年05期
• 关键词: 磁处理 棕壤 固氮菌 数量

棕壤经磁场处理后,采用稀释平板法测定土壤中的固氮菌数量,结果表明,100、300mT场强对其有一定的激发效应,处理后第3d,磁化处理5min的土壤中固氮菌数量均达最大,其中300mT场强处理的土壤中固氮菌数量较对照增长最大,为276%,100mT、500mT场强处理固氮菌数量分别较对照增长了252%和57.8%。而高场强、长时间处理则表现出一定的抑制作用,500mT场强10min处理在处理后第1d固氮菌数量比对照减少了48%。上述变化随着场强和时间的改变表现出一定的规律性。

After the magnetic field treatment, the amount of nitrogen-fixing bacteria in the soil was measured by the dilution plate method. The results showed that the field strength of 100,300mT had some stimulating effect on the brown soil. The number of nitrogen-fixing bacteria in the soil after 3 days and 5 minutes of treatment The maximum number of azotobacter in soil treated with 300 mT field strength was 276%, which was increased by 252% and 57.8% compared with the control. However, high field strength and prolonged treatment showed some inhibitory effects. The amount of nitrogen-fixing bacteria on the first day after treatment with 500 mT field intensity was 48% less than that of the control. The above changes with the field strength and time changes showed some regularity.