本文選題：土壤 + Cd　； 參考：《北方園藝》2017年20期

【摘要】：以盆栽小白菜、蘿卜和辣椒為試材,對其根際土壤采用磷脂脂肪酸(PLFA)含量分析、土壤理化性質(zhì)分析方法,分為清水與清水+鎘(Cd)2種處理,研究了不同處理對蔬菜根際土壤微生物群落的影響。結(jié)果表明:1)清水+Cd處理的蔬菜根際土壤微生物的含量均無顯著差異,但蘿卜根際土壤的微生物含量與小白菜和辣椒相比較低。2)主成分分析表明,用清水+Cd灌溉處理蔬菜,對蘿卜根際土壤微生物群落結(jié)構(gòu)影響最大。3)不同灌溉方式處理下的蔬菜根際土壤微生物類群中PLFA的含量均表現(xiàn)為革蘭氏陽性菌(G+)革蘭氏陰性菌(G-)放線菌真菌;與清水對照相比,用含Cd的溶液灌溉蔬菜,其PLFA值均無顯著差異。4)用不同灌溉方式澆灌蔬菜,在蔬菜收獲期對土壤理化性質(zhì)進行分析表明,清水+Cd處理對小白菜吸收土壤中的全氮及蘿卜和辣椒吸收土壤中的硝酸鹽氮的影響較大。
[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.
【作者單位】： 新疆農(nóng)業(yè)大學(xué)草業(yè)與環(huán)境科學(xué)學(xué)院;
【基金】：國家自然科學(xué)基金資助項目(21267022)
【分類號】：S154.3;X53

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本文編號：2109528