关键词: 空间变异性, 微生物特性, 地统计学, 污染土壤, 磷脂类脂肪酸

Abstract: By the method of hydroponic culture, this paper studied the absorption and distribution of Cu and other elements in Typha angustifolia under stress of different concentration Cu2+. The results showed that the Cu accumulation amount in T. angustifolia aboveground part and root increased markedly with increasing Cu2+ concentration in the medium. Under the same Cu stress, root had an obviously higher Cu accumulation than aboveground part. The Cu content in the same root tissues increased obviously with increasing Cu stress, and the root Cu content under the same Cu stresses was decreased in the order of pericycle tissues > cortex tissues > cuticle tissues. Low concentration Cu2+ (1 and 5 mg·L-1) in the medium had no significant effects on the Ca and Mg contents in aboveground part and root and the Mn content in aboveground part, while high concentration Cu2+ (80〖KG-*2〗-〖KG-*7〗100 mg·L-1) in the medium increased the Ca absorption but decreased the Mg, Mn, and Zn absorption remarkably. The Ca absorption increased while the Zn absorption decreased under the stress of 55〖KG-*2〗-〖KG-*7〗100 mg·L-1 Cu2+, and the Cl and K absorption increased under the stress of 55〖KG-*2〗-〖KG-*7〗80 mg·L-1 Cu2+ but decreased obviously under the stress of 100 mg·L-1 Cu2+. The accumulated Ca and Zn in root mainly distributed in pericycle tissues, while the accumulated Cl was mainly in cortex tissues.

Key words: Spatial variation, Microbial property, Geostatistics, Contaminated soil, Phospholipid fatty acid