Purpose

Rock phosphate (RP) and farm yard manure (FYM) can promote plant growth, but little is known about the effect of sugar juice residues (FMC) on Zn, Cu, Cd, and Pb phyto-availability.

This study investigated the effects of FYM and FMC added alone or each in combination with RP on wheat growth and Zn, Cu, Cd, and Pb uptake.

Methods

Wheat was grown in a soil amended with 0.25, 0.5, or 0.75 g RP or with 5, 10, or 20 g kg^-1 soil of FYM, or FMC, added separately, or each in combination with 0.75 g P₂O₅-RP kg^-1 soil. At harvest, shoot N, P, and K; soil pH; available P and DTPA-Zn, Cu, Pb, and Cd, dry matters of root, shoot, and grain; and heavy metals’ concentration in each organ were determined.

Results

RP addition increased growth and P and K uptake and reduced Zn, Cu, Cd, and Pb of wheat more at the high application rate compared to the low application rate. Compared to the control, FYM addition decreased soil pH, increased P and metals availability and uptake, and decreased plant biomass, whereas FMC addition increased soil pH, decreased P and metals availability and uptake, and increased plant biomass; these effects were maximized with increasing the application rate.

Conclusion

The results revealed that FMC has the potential in limiting heavy metal uptake and that the combined application of FMC and RP is beneficial for wheat growth.

中文翻译：

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磷肥加上农家粪肥或糖汁残留物对小麦生长及某些养分和重金属吸收的影响

目的

磷酸盐岩（RP）和农田肥料（FYM）可以促进植物生长，但是人们对糖汁残渣（FMC）对Zn，Cu，Cd和Pb的植物有效性的影响知之甚少。

这项研究调查了单独或与RP一起添加的FYM和FMC对小麦生长以及锌，铜，镉和铅吸收的影响。

方法

小麦是与0.25，0.5，或0.75克RP或用5，10或20修正了土壤中生长的克千克^-1 FYM，或FMC的土壤，单独加入，或者每个结合0.75克P ₂ ö ₅ - RP kg ^-1土壤。收获时，分别喷施氮，磷和钾。土壤pH 有效磷和DTPA-Zn，Cu，Pb和Cd，根，茎和谷物的干物质 测定每个器官中的重金属浓度。

结果

与低施用量相比，高施用量下添加RP增加了小麦的生长和磷钾吸收，并减少了锌，铜，镉和铅。与对照相比，FYM的添加降低了土壤的pH，增加了磷和金属的利用和吸收，并减少了植物生物量，而FMC的添加增加了土壤的pH，降低了P和金属的利用和吸收，并增加了植物的生物量。随着施用率的增加，这些作用被最大化。

结论

结果表明，FMC具有限制重金属吸收的潜力，FMC和RP的联合应用有利于小麦的生长。