Effects Of EDTA And Organic Fertilizer On Plant Growth And Copper Absorption Features

Mining process engender the waste not only take up a lot of the land resources, but also tofarmland soil caused serious pollution. So in the ecological restoration of mining wastelandshas become one of the important contents of ecological environment control, Mining area controlof princeps premise is plant resources and soil improvement measures of scientific choice. In thisexperiment, taking the tailings soil and slag soil of Jinchuan Group as matrix.Pot experimentswere conducted on100﹪slag soil(A),100﹪tailings soil(B),70﹪slag soil+30﹪farmland soil(C),70﹪tailings soil+30﹪farmland soil(D) and100﹪farmland soil(E), respectively add indifferent concentrations of EDTA and Organic fertilizer Agropyron cristantum, Festuca elata,Salsola ruthenica Iljin, Althaea rosea, Peganum harmala grow conditions as well as absorb,transport and enrichment regularity of Cu. Each of the soil sample set respectively7treatment,Including the three EDTA (EDTANa2) treatments(E-1, E-2, E-3, E-1is2.5mmol/kg, E-2is5.0mmol/kg, E-3is7.5mmol/kg), Three organic fertilizer (Sheep droppings) treatments (Y-1, Y-2,Y-3, Y-1is10g/kg, Y-2is50g/kg, Y-3is90g/kg) and a CK.In all soil samples,plant growth andCu absorption characteristics and changes regularity are as follows:1. Plants Germination rate of featureThe germination rate of Agropyron cristantum in slag soil is lower than tailings soil andfarmland soil; The germination rate of Festuca elata in slag soil and tailings soil are higher thanfarmland soil; Salsola ruthenica Iljin of germination rate change little in different soil samples,Range change is38.6﹪～41.7﹪; The germination rate of Althaea rosea in slag soil is higherthan tailings soil and farmland soil; The germination rate of Peganum harmala in tailings soil ishigher than slag soil and farmland soil.2. Organic fertilizer treatment on the influence of the germination rate plantsAdd organic fertilizer to the soil samples, plant germination rate are basically higher thanthat of CK. With the organic fertilizer in the soil sample the increase, Agropyron cristantum,Festuca elata, Althaea rosea, Peganum harmala of germination rate are biggest adding50g/kg oforganic fertilizer at soil, Salsola ruthenica Iljin of germination rate is biggest adding90g/kg oforganic fertilizer at soil.3. Effect of EDTAon the survival rate of plants influenceSoil samples of different concentrations of EDTA added, With adding increasingconcentrations of EDTA in soil samples, Plants survival rate are gradually reduced and basicallylower than CK. In the E soil samples, adding different concentrations of EDTA plant survivalrate almost no influence.4. Add organic fertilizer and EDTAon plants’height changesWith the organic fertilizer in the soil sample the increase, plants’height gradually increased, Organic fertilizer dispose plants’ height basically higher than EDTA and CK; With addingincreasing of EDTA, plants’height are gradually reduced in A, B, C, D, four soil samples. In theE soil samples, adding of EDTAplants’height almost no influence.5. Aboveground parts and root Cu content changesIn soil samples,Adding EDTA can increase Cu content of the Agropyron cristantumaboveground parts and root, Organic fertilizer can reduce Cu to Agropyron cristantum poisonedin the soil samples; Under different treatments, Agropyron cristantum various parts of the Cucontent is lower than in other soil samples at the E soil samples. EDTAand Organic fertilizer canincrease Cu content of the Festuca elata aboveground parts; Under EDTA treatments, Festucaelata in the Cu content is higher than organic fertilizer and CK treatments. In soilsamples,Adding EDTA can increase Cu content of the Salsola ruthenica Iljin and Althaea roseaaboveground parts and root, Organic fertilizer can reduce Cu content of the Salsola ruthenicaIljin and Althaea rosea aboveground parts and root. EDTA can increase Cu content of thePeganum harmala aboveground parts and root, Organic fertilizer can increase Cu content of thePeganum harmala aboveground parts.6. Plant transfer coefficient and enrichment coefficient to CuAgropyron cristantum, Festuca elata, Salsola ruthenica Iljin transport coefficient andenrichment coefficient to Cu are less than1adding EDTA and organic fertilizer in soil samples,Agropyron cristantum transport coefficient and enrichment coefficient to Cu are biggest adding2.5mmol/kg of EDTA at soil; In soil samples adding90g/kg of organic fertilizer, Agropyroncristantum transfer coefficient and enrichment coefficients to Cu are greater than other organicfertilizer treatments; Festuca elata and Salsola ruthenica Iljin transport coefficient andenrichment coefficient to Cu is biggest adding7.5mmol/kg of EDTA at soil, In soil samplesadding50g/kg of organic fertilizer, Festuca elata and Salsola ruthenica Iljin transfer coefficientand enrichment coefficient to Cu are greater than other organic fertilizer treatments.Althaea rosea, Peganum harmala transport coefficient to Cu is greater than1, butenrichment coefficient to Cu is less than1at each treatment; In soil samples, Althaea roseaenrichment coefficient to Cu is biggest adding5mmol/kg of EDTA at soil, adding10g/kg oforganic fertilizer, Althaea rosea enrichment coefficient to Cu is greater than other organicfertilizer treatments, different treatment of Althaea rosea to Cu transfer coefficient is greatdifferences; Adding7.5mmol/kg of EDTA, Peganum harmala transport coefficient to Cu isgreater than other EDTA treatments, enrichment coefficient is biggest; Peganum harmalatransport coefficient to Cu is biggest adding90g/kg of EDTA at soil, enrichment coefficient toCu is greater than other organic fertilizer treatments; Under different treatments.