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为更加科学合理地利用污水灌溉农田,分别以100%、50%、33.3%和25%的污水及全清水(CK)浇灌盆栽大豆,研究不同浓度的污水浇灌对大豆幼苗生理生化特性及根际微生物生理类群的影响。结果显示:低浓度的污水可增加叶绿素含量,激活SOD、CAT活性,促进硝化细菌、固氮菌和纤维素分解菌的生长,抑制反硝化细菌和氨化细菌的生长;高浓度污水可显著降低叶绿素含量和SOD、CAT活性,抑制硝化细菌、固氮菌和纤维素分解菌的生长,刺激反硝化细菌和氨化细菌的生长繁殖,促进MDA的积累和膜透性增加。多项指标以污水浓度为33.3%～50.0%时的增效作用最为明显。
In order to make more scientific and rational use of sewage irrigated farmland, potted soybean was drenched with 100%, 50%, 33.3% and 25% of total and clear water (CK) respectively to study the effects of different concentrations of sewage irrigation on physiological and biochemical characteristics and rhizosphere Effects of Microbial Physiological Groups. The results showed that low concentrations of sewage could increase the content of chlorophyll, activate the activities of SOD and CAT, promote the growth of nitrifying bacteria, azotobacter and cellulose-decomposing bacteria and inhibit the growth of denitrifying bacteria and ammonifying bacteria. The high concentrations of sewage can significantly reduce the chlorophyll Content and activities of SOD and CAT, inhibiting the growth of nitrifying bacteria, azotobacter and cellulolytic bacteria, stimulating the growth and reproduction of denitrifying bacteria and ammonifying bacteria, promoting the accumulation of MDA and increasing the membrane permeability. A number of indicators to the sewage concentration of 33.3% ~ 50.0% synergy when the most obvious.