重金属Cd对蔬菜根际土壤微生物群落的影响

发布时间：2018-07-09 13:34

本文选题：土壤 + Cd　；参考：《北方园艺》2017年20期

【摘要】：以盆栽小白菜、萝卜和辣椒为试材,对其根际土壤采用磷脂脂肪酸(PLFA)含量分析、土壤理化性质分析方法,分为清水与清水+镉(Cd)2种处理,研究了不同处理对蔬菜根际土壤微生物群落的影响。结果表明:1)清水+Cd处理的蔬菜根际土壤微生物的含量均无显著差异,但萝卜根际土壤的微生物含量与小白菜和辣椒相比较低。2)主成分分析表明,用清水+Cd灌溉处理蔬菜,对萝卜根际土壤微生物群落结构影响最大。3)不同灌溉方式处理下的蔬菜根际土壤微生物类群中PLFA的含量均表现为革兰氏阳性菌(G+)革兰氏阴性菌(G-)放线菌真菌;与清水对照相比,用含Cd的溶液灌溉蔬菜,其PLFA值均无显著差异。4)用不同灌溉方式浇灌蔬菜,在蔬菜收获期对土壤理化性质进行分析表明,清水+Cd处理对小白菜吸收土壤中的全氮及萝卜和辣椒吸收土壤中的硝酸盐氮的影响较大。
[Abstract]:Potted pakchoi, radish and capsicum were used to analyze the content of phospholipid fatty acids (PLFA) in the rhizosphere soil, and the physical and chemical properties of the soil were analyzed, which were divided into two kinds of treatments: clear water and clear water cadmium (CD). The effects of different treatments on soil microbial community in vegetable rhizosphere were studied. The results showed that there was no significant difference in microbial content in rhizosphere soil of vegetables treated with water CD, but the microbial content of radish rhizosphere soil was lower than that of pakchoi and capsicum. The principal component analysis showed that the vegetables were irrigated with clean water CD, but the microorganism content of radish rhizosphere soil was lower than that of pakchoi and chili pepper. The content of PLFA in rhizosphere soil of different irrigation treatments was Gram-positive bacteria (G) Gram-negative bacteria (G-) actinomycetes. Compared with the fresh water control, the PLFA values of the vegetables irrigated with the solution containing CD had no significant difference (.4) the vegetables were irrigated with different irrigation methods, and the physical and chemical properties of the soil were analyzed during the harvest period of the vegetables. CD treatment in clear water had a great effect on the absorption of total nitrogen in pakchoi and nitrate nitrogen in soil by radish and pepper.
【作者单位】：新疆农业大学草业与环境科学学院;
【基金】：国家自然科学基金资助项目(21267022)
【分类号】：S154.3;X53

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