| As one of the components of complex ecosystems, soil animals is to promote thecirculation of materials and energy flow indispensable driving force. Since the speciesdiversity of soil animals, effect of the interaction between different groups of soil fauna onecosystem function is very complex, so now for the ecological functions of soil animalsnot yet clear. Springtails are an important part of the community structure of soil fauna,and nematodes, mites together constitute the three dominant groups of soil animals,Springtails plays a key role in nutrient cycling in the soil, soil processes, the establish ofsoil microstructure, maintain soil biological structure, physical and chemical properties ofthe soil.Springtails play an important supporting role in plant metabolites decompositionprocess, its interaction with the litter play a crucial contribution of recovery tailings soilnutrients. As a significant ecological layer in ecosystems, there are numerous soilspringtails in it, and the interaction with the soil springtails profound impact on soilnutrient cycling. Collembola through feeding and crushing the leaves to damage thexylem layer, microbial decomposition to continue. Nutrient and energy from the litterobtained in the form of inorganic or small molecules and release into the soil. Ecologicalfunctions of soil springtails study is of great significance to further reveal the process ofsoil springtails its interaction with the litter on soil nutrient of copper tailings ground,while allowing a better understanding of terrestrial ecosystems many important ecologicalprocesses and provide the basis for ecological restoration for copper tailings.This study chosen Phoenix mountain linchong tailings wastelands at Tongling Cityfor the study, conducted field sampling in March2013, in addition to a detailed surveysampling and set up the artificial “add”,“remove” springtails and litter in laboratoryexperiments. Analyzed under different time gradient whether the presence or absence ofspringtails and litter treatment effects of different nutrient content. The results were asfollows:1. Different treatment for the effects of soil nutrients Effects on soil organic matter: whether the soil springtails involved in processing atdifferent culture time gradient of its organic matter content showed extremely significantdifferences (p <0.01). Collembola (month) treatment under organic content was extremelysignificantly higher than Remove Collembola (month) treatment (p <0.01), Collembola(three months) is also extremely significantly higher than Remove Collembola (threemonths) treatment (p <0.01), and the maximum of organic matter in Collembola (threemonths) treatment. Interactions between Collembola and litter on soil organic mattercontent of the maximum in Remove Collembola+Litter (month), its was significantlyhigher than Collembola+Litter (month) treatment (p <0.01), Collembola+Litter (threemonths) organic matter content treatment was significantly higher than RemoveCollembola+Litter (three months) treatment (p <0.01).For total phosphorus concentrations in soil: Soil treated with or without theparticipation of springtails gradients at different incubation time, in addition to RemoveCollembola (three months). In addition, there were no significant differences between theother treatments, but significantly lower than the Remove Collembola (three months)treatment (p <0.05). Participate springtails and litter under Collembola+Litter (month)there is no significant difference in dealing with Remove Collembola+Litter (month)treatment, but the total phosphorus content of Collembola+Litter (three months)treatment was significantly lower than under the Remove Collembola+Litter (threemonths) treatment (p <0.05).For the total nitrogen content of the soil effects: there were no significant differencesbetween every treatments, but do not think that there is no effect of springtails, themechanism of the interaction between soil microbial and springtails affect the totalnitrogen content needs further discussion, for soil collembola as a direct and indirectimpact of the media aspects of soil nitrogen release and uptake still need to deepen thestudy.For the impact of soil available phosphorus content: whether the soil springtailsinvolved in processing at different incubation time gradients available phosphorus contentshowed extremely significant differences (p <0.01). Collembola (month) treatment wasextremely significantly higher than Remove Collembola (month) treatment (p <0.01),Collembola (three months) treatment was extremely significantly higher than RemoveCollembola (three months) treatment (p <0.01), but the treatment after three months of theavailable phosphorus content is significantly lower than a month of treatment. Gradient between different time under the same joint participation under springtails and litter,available phosphorus content showed a extremely significant difference (p <0.01),Collembola+Litter (month) and Remove Collembola+Litter (month) treatment,Collembola+Litter (three months) and Remove Collembola+Litter (three months) thereis no significant difference in treatment, also showed available phosphorus content ofthree months treatment is significantly lower than a month of treatment.Effects on soil hydrolysable nitrogen: treatment with or without the join of the soilspringtails in Remove Collembola (month) treatment was extremely significantly higherthan Collembola (month) treatment (p <0.01), and Collembola (month) the minimumhydrolysable nitrogen content, Collembola (three months) was extremely significantlyhigher than Remove Collembola (three months) treatment (p <0.01). Interaction betweenspringtails and litter hydrolysable nitrogen content of each treatment showed a extremelysignificant difference (p <0.01), Remove Collembola+Litter (month) treatment wasextremely significantly lower than the Collembola+Litter (month) treatment (p <0.01)and Remove Collembola+Litter (month) processing the minimum content ofhydrolysable nitrogen, Collembola+Litter (three months) treatment was extremelysignificantly higher than Remove Collembola+Litter (three months) treatment (p <0.01)and Collembola+Litter (three months) the maximum content of the processing.2. After the end of each training correlation between the nutrient content of the soil①Whether the soil springtails involved in training after a month, total nitrogen andhydrolysable nitrogen (r=0.985) shows significantly positive correlation, total phosphorusand total nitrogen into a very significant negative correlation (r=-0.992), total phosphorusand hydrolysable nitrogen is also a very significant negative correlation (r=-0.989),organic matter and pH with a significant negative correlation (r=-0.842). Springtails andlitter joint participate after a month soil organic matter and total nitrogen shows significantpositive correlation (r=0.849), available phosphorus and hydrolysable nitrogen is also avery significant positive correlation (r=0.817), soil pH and available phosphorus (r=-0.889) and hydrolysable nitrogen(r=-0.837) was significant negative correlation.②Whether the soil springtails involved in training after three months, total nitrogenand available phosphorus (r=0.933) shows significantly positive correlation, availablephosphorus and hydrolysable nitrogen is also a very significant positive correlation (r=0.804), total nitrogen and organic matter shows significantly positive correlation(r=0.805),total phosphorus and organic matter significant negative correlation (r=-0.921), soil pH and available phosphorus significant negative correlation (r=-0.850). Springtails andlitter joint participate after a month soil available phosphorus and hydrolysable nitrogenand total nitrogen significant positive correlation (r=0.865, r=0.862), soil pH and totalphosphorus significant positive correlation (r=0.862), soil pH and organic mattersignificant negative correlation (r=-0.890).3. Characteristics of soil nutrients after trainingFrom the statistical characteristics of soil nutrient, in addition to a weak nitrogencontent variability and other moderate variation, the traits of soil whole area is relativelyhomogeneous. Copper mine tailings soil nutrient Characters after culture showed that thesoil was slightly alkaline, According to soil fertility status indicators, the content of totalnitrogen, total phosphorus, available phosphorus is low. Maintain soil fertility is weak, itshould be carried out to strengthen the fertility of soil in ecological reconstruction process,in order to meet the animal, plant and microbial growth substrate conditions require. |
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