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Correction to: Effect of biosolid hydrochar on toxicity to earthworms and brine shrimp
Melo, Tatiane Medeiros,Bottlinger, Michael,Schulz, Elke,Leandro, Wilson Mozena,de Aguiar Filho, Adelmo Menezes,Ok, Yong Sik,Rinklebe, Jö,rg Springer-Verlag 2018 Environmental geochemistry and health Vol.40 No.1
Plant and soil responses to hydrothermally converted sewage sludge (sewchar)
Melo, Tatiane Medeiros,Bottlinger, Michael,Schulz, Elke,Leandro, Wilson Mozena,Menezes de Aguiar Filho, Adelmo,Wang, Hailong,Ok, Yong Sik,Rinklebe, Jö,rg Elsevier 2018 CHEMOSPHERE - Vol.206 No.-
<P><B>Abstract</B></P> <P>This study compared the effects of sewchar and mineral fertilizer on plant responses in beans (<I>Phaseolus vulgaris</I>, var. “Jalo precoce”) and soil properties in a pot experiment in a completely randomized design with two harvests. The initial treatments consisted of a control, sewchar doses of 4, 8, 16 and 32 Mg ha<SUP>−1</SUP> and mineral fertilizer (30 mg N, 90 mg P<SUB>2</SUB>O<SUB>5</SUB> and 60 mg K<SUB>2</SUB>O kg<SUP>−1</SUP>). The treatments (4 replications each) were fertilized with 135 mg P<SUB>2</SUB>O<SUB>5</SUB> kg<SUP>−1</SUP> at the second harvest. The sewchar application rates correlated positively with the CEC, the water holding capacity, the availability of Zn, Ca, Fe, Cu, and P, and the concentrations of nitrate, ammonium, total N, total organic carbon and hot water extractable carbon. They correlated negatively with the Mg availability and the soil C: N ratio. Additionally, they correlated positively with the P, Zn and Ca uptake from the soil. For both harvests, the 16 Mg ha<SUP>−1</SUP> sewchar treatment had a total dry matter equivalent to that of the mineral fertilizer. After the second harvest, the 16 Mg ha<SUP>−1</SUP> sewchar treatment revealed 96% higher plant biomass than the control and 79% higher biomass than it did during the first period. The positive effect of sewchar in addition to phosphorous on the plant response and soil properties suggests that the residual effect of sewchar could be a promising alternative as a soil amendment for partly replacing mineral fertilizers. In future, further studies are necessary to evaluate long-term residual effects of sewchar in soil.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Mineral fertilizer had higher total dry matter in the first harvest. </LI> <LI> The 16 Mg ha<SUP>−1</SUP> sewchar dose had total dry matter equivalent to mineral fertilizer. </LI> <LI> Increasing sewchar doses correlated positively with P, Zn and Ca plant uptake. </LI> <LI> Sewchar doses had higher total dry matter average in the second harvest. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>