Effects of bamboo charcoal and bamboo vinegar on nitrogen conservation and heavy metals immobility during pig manure composting

Cattle and pig manure contain useful mineral nutrients (N, P, and K) and are therefore used as organic fertilizer. However, excessive applications of manure can cause environmental problems and threaten animal and human health because these materials also hold significant amounts of heavy metals, particularly Cu and Zn. To assess the potential risk due to the increased concentrations of heavy metals (Cu, Mn, Zn, and Cr) in a harvested crop, two maize hybrids were grown in pots on four different soils with three different fertilisers (urea, pig manure, and cattle manure). Both soil and manure characteristics influenced the heavy metal concentrations in the plant shoots. Organic fertilisation strongly interacted with the soils and, in general, reduced the shoot content of Cu, Mn, and Zn. A preliminary assessment of the heavy metal balance of the agricultural systems based on the intensive livestock production and maize cultivation showed that the potential soil enrichment of the long-term application of livestock manure arises mainly from the application of pig slurries that have a high content of Cu and Zn. The time required to apply an amount of metal that is equal to the initial soil content is 60–300 years for Zn and 240–450 years for Cu, depending on the soil type and the initial heavy metal content.

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Enhanced antibiotic removal by the addition of bamboo charcoal during pig manure composting

RSC Advances ◽

10.1039/c5ra27493a ◽

2016 ◽

Vol 6 (33) ◽

pp. 27575-27583 ◽

Cited By ~ 13

Author(s):

Li Wang ◽

Guangcai Chen ◽

Gary Owens ◽

Jianfeng Zhang

Keyword(s):

Pig Manure ◽

Bamboo Charcoal ◽

Antibiotic Removal

The addition of bamboo charcoal during pig manure composting enhanced the depletion of antibiotics, ciprofloxacin, chlorotetracycline, and norfloxacin.

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Accumulation of heavy metals in soil and maize after 17-year pig manure application in Northeast China

Plant Soil and Environment ◽

10.17221/648/2019-pse ◽

2020 ◽

Vol 66 (No. 2) ◽

pp. 65-72 ◽

Cited By ~ 1

Author(s):

Changrui Zhou ◽

Qiang Ma ◽

Wantai Yu ◽

Zhuqing Xia ◽

Chuanchuan Ning ◽

...

Keyword(s):

Heavy Metals ◽

Northeast China ◽

Pig Manure ◽

Traditional Practice ◽

Total N ◽

Maize Roots ◽

Maize Grain ◽

Cu And Zn ◽

Term Field

Application of composted pig manure (PM) is a traditional practice to improve soil fertility, whereas generally leads to some environmental questions. The effects of PM application on Cd, Cu and Zn accumulation in soil and maize were investigated based on a long-term field trial in Northeast China, including control (CK), PML, PMM, and PMH, receiving 0, 100, 250 and 500 kg total N/ha/year from 2002 to 2008 and 0, 10, 25 and 50 t fresh weight/ha/year from 2009 to 2018, respectively. Results showed that long-term soil application of PM increased maize grain yield, soil organic carbon (SOC) contents, coupled with significant accumulation and availability of Cd, Cu, and Zn in soil (0–15 cm). Compared with CK, the soil total Cd, Cu and Zn concentrations significantly increased by 105, 287 and 108% at high PM rate, respectively. Notably, the increments enhanced these heavy metals storage in maize roots rather than in grains. Moreover, the application of PM confirmed vertical transport of heavy metals in the tested soil, particularly for Cd and Cu in PMH treatment. Overall, the repeated application of PM can cause the accumulation and leaching of Cd, Cu and Zn in soil.

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