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采用水培试验,研究蚓粪及蚯蚓培养载体牛粪中水溶性有机物(DOM)对不同Cu2+浓度下(0、5、10mg.L-1)黑麦草吸收Cu2+的影响.结果表明:随着Cu2+浓度的增加,黑麦草地上部、根干质量,以及根系的长度、表面积、体积和根尖数均逐渐下降;DOM显著增加了Cu2+处理下黑麦草地上部及根系生物量,促进了其根系的长度、表面积、体积和根尖数的增长.DOM降低了黑麦草地下部Cu2+浓度,促进了Cu2+从地下部向地上部的运输,显著增加了地上部Cu2+积累量.蚓粪DOM对黑麦草的影响优于牛粪DOM,并且供试高浓度DOM效果优于低浓度.
Hydroponic experiments were conducted to study the effects of DOM on the concentration of water-soluble organic matter (DOM) in culture media of earthworm culture on the uptake of Cu2 + by ryegrass (0, 5 and 10mg.L-1) under different Cu2 + concentrations.The results showed that with the increase of Cu2 + With the increasing of concentration, the root and stem mass, root length, surface area, volume and root number of ryegrass decreased gradually. DOM significantly increased the biomass and root biomass of ryegrass and root system under Cu2 + treatment Length, surface area, volume and root tip number.DOM reduced the concentration of Cu2 + in the lower part of ryegrass and promoted the transport of Cu2 + from aboveground to aboveground and significantly increased the accumulation of aboveground Cu2 + The effect was better than that of cow manure DOM, and the test effect of high concentration of DOM was better than low concentration.