Effects Of Fermented Industrial Reclaimed Water On Water Consumption,Growth Of Greening Tree And Soil Salinity

To study the feasibility of fermented reclaimed water?from fermented industrial wastewater?in urban green irrigation.In a pot experiment,five greening tree species?Picea asperata,Pinus sylvestris,Platycladus orientalis,Ligustrum quihoui and Ulmuspumila pumila?were planted in two kinds of soil texture?sandy loam and silt loam soil?.There water consumption,plant growth and soil soluble salt content in planting five species of green trees changes were investigated when irrigated with clean water?control?and reclaimed water from fermentation industry.The results show:?1?Reclaimed water irrigation and different soil types basically do not change the trend of water consumption of the five greening tree species.The water consumption trend of the greening tree species under each treatment basically shows a single peak type.The accumulated water consumption of five green tree species planted in two kinds of soil under the irrigation of reclaimed water and mixed water was lower than that of clean water.Reclaimed water irrigation significantly reduced the evapotranspiration of Picea asperata?34.33%?,Platycladus orientalis?37.04%?,Ligustrum quihoui?40.05%?and Ulmuspumila pumila?28.66%?under sandy loam;?2?The reclaimed water irrigation and different soil types basically did not change the trend of the K_c values of five tree species,and the K_c value of the tree species under the various treatments was basically unimodal.Under the irrigation of reclaimed water,the K_c values of the five greening tree species planted under the sandy loam soil decreased compared with that of clear water,Picea asperata?34.55%?,Platycladus orientalis?37.43%?,Ligustrum quihoui?39.55%?and Ulmuspumila pumila?27.89%?.The K_c value is significantly reduced compared with clean water,the K_c values of the five greening tree species decreased under reclaimed water irrigation.Under the mixed water irrigation,except for the Pinus sylvestris planted in sandy loam and the Ligustrum quihoui of the first growth stage planted in two kinds of soil,under greening.The K_c value of the rest treated tree species was also lower than that of clean water;?3?Under the irrigation of reclaimed and mixed water,the plant height and crown of daily growth trend were basically single-peak,the growth peaks were different.From the perspective of the cumulative growth of plant height,spruce,Picea asperata,Pinus sylvestris and Ulmuspumila pumila were suitable for sandy loam under clean water irrigation,Platycladus orientalis,Ligustrum quihoui were suitable for silt loam soil under mixed water irrigation.With regard to cumulative growth of crown width,Picea asperata,Ligustrum quihoui and Ulmuspumila pumila were suitable for silt loam soil under clean water irrigation,Pinus sylvestris,Platycladus orientalis were suitable for sandy loam under clean water irrigation;?4?Taking biomass as an indicator,except that was not conducive to the increase of root-shoot ratio and root weight ratio,Picea asperata was suitable to be planted in sandy loam?clean water?.Taking biomass as an indicator,Pinus sylvestris was suitable for the silt loam soil?clean water?,taking the tree leaf moisture content,root to crown ratio as an indicator,it was suitable for planting in sandy loam soil?clean water?,taking the root weight ratio as an indicator,it was suitable for sandy loam soil?mixed water?.Taking the biomass,total biomass,root/shoot ratio and root weight as indicators,Platycladus orientalis were suitable for sandy loam soil?clean water?,above-ground biomass as an indicator,it was suitable for silt loam?fresh water?,the water content of leaves as an indicator,it was suitable for silt loam soil?reclaimed water?;Taking the above-ground,underground,total biomass,and root-shoot ratio and root-to-ground weight ratio as indexes,Ligustrum quihouiare suitable to be planted in sandy loam?clean water?,the water content of the shoots as an indicator,it was suitable for planting in silt-loam soil?reclaimed water?;Taking the biomass,root-shoot ratio and root weight ratio as indicators,Ulmuspumila pumila was suitable to be planted in sandy loam?clean water?,the water content of the branches and leaves was used as an indicator,Ulmuspumila pumila was suitable for planting in silt loam soil?fresh water?;?5?Under the irrigation of reclaimed and mixed water,the chlorophyll content and the nitrogen balance index trend were basically single-peak,the peak time were different.The Chlorophyll content of Pinus sylvestris was highest under sandy loam soil and clean water irrigation;The nitrogen balance index of Picea asperata irrigated with clean water in sandy loam soil,and Pinus sylvestris planted in silt loam soil and irrigated with clear water were highest;The leaf area index of Ulmuspumila pumila was highest under the silt loam soil for irrigation with mixed water.?6?After the sampling was broken,the sandy loam irrigation with clean water planted with Picea asperata of HCO₃^-,Cl^-,K⁺,Na⁺and SO₄^2-,the silt loam of Ca²⁺was the lowest,the sandy loam of Mg²⁺after irrigation with reclaimed water was the lowest.The sandy loam irrigation with reclaimed water planted with Pinus sylvestris of Cl^-,Ca²⁺and Mg²⁺,irrigation with mixed water the amount of HCO₃^-was the lowest and with clean water the amount of SO₄^2-was the lowest.The sandy loam irrigation with fresh water planted with Platycladus orientalis,the amount of Cl^-,Ca²⁺,K^+,Na⁺,and SO₄^2-were the lowest,the amount of HCO₃^-was the lowest irrigation with reclaimed water,the amount of Mg²⁺was the lowest with mixed water.The sandy loam irrigation with fresh water planted with Ligustrum quihoui of Cl^-,K⁺,Na⁺,and SO₄^2-was the lowest,irrigation with mixed water the HCO₃^-was the lowest and irrigation with reclaimed water the Mg²⁺was the lowest,silt loam soil irrigation with fresh water of Ca²⁺was the lowest.The sandy loam irrigation with fresh water planted with Ulmuspumila pumila of HCO₃^-,Cl^-,K⁺,Na⁺and SO4^2-were the lowest,the amount of Mg²⁺irrigaion with mixed water was the lowest,and the silt loam soil irrigation with fresh water of Ca²⁺was the lowest.In terms of soil total salt content,all five greening tree species were suitable for planting in sandy loam?clean water?.