title: Nutrient transformations during composting of pig manure with bentonite.
abstract: This work aimed to evaluate the influence of different amounts of bentonite on nutrients transformation during pig manure composting process. The results showed that bentonite had no significant effects on compost temperature and pH changes. While, EC, moisture, OM, TN and NO(3)(-)-N were notably influenced by BT addition. The adding of BT could facilitate OM degradation, increase TKN content and decrease the C/N ratio. Increasing the proportion of bentonite in pig manure compost to reduce extractable heavy metal content is feasible. However, potherb mustard seed GI decreased with the proportion of added bentonite increasing. The results suggest that a proportion of less than 2.5% bentonite is recommended for addition to pig manure compost, and examining the additive ratio in a comprehensive waste composting project is a worthwhile direction for future research.
authors.affiliation: College of Resources and Environment, Northwest A& F University, Yangling, Shaanxi Province 712100, People's Republic of China.
authors.forename: Ronghua
authors.initials: R
authors.lastname: Li
authors.forename: Jim J
authors.initials: JJ
authors.lastname: Wang
authors.forename: Zengqiang
authors.initials: Z
authors.lastname: Zhang
authors.forename: Feng
authors.initials: F
authors.lastname: Shen
authors.forename: Guangjie
authors.initials: G
authors.lastname: Zhang
authors.forename: Rui
authors.initials: R
authors.lastname: Qin
authors.forename: Xiaolong
authors.initials: X
authors.lastname: Li
authors.forename: Ran
authors.initials: R
authors.lastname: Xiao
mesh_terms: D000704:Analysis of Variance; D000818:Animals; D001546:Bentonite / Q000737:chemistry* / Q000494:pharmacology; D003124:Colorimetry; D004553:Electric Conductivity; D018525:Germination / Q000187:drug effects; D006863:Hydrogen-Ion Concentration; D008372:Manure / Q000032:analysis*; D019216:Metals, Heavy / Q000032:analysis; D009149:Mustard Plant / Q000254:growth & development; D009584:Nitrogen / Q000032:analysis; D010758:Phosphorus / Q000032:analysis; D012639:Seeds / Q000187:drug effects / Q000502:physiology; D012987:Soil / Q000737:chemistry*; D013054:Spectrophotometry, Atomic; D013552:Swine; D013696:Temperature
chemical_list: D008372:Manure; D019216:Metals, Heavy; D012987:Soil; D001546:Bentonite; D010758:Phosphorus; D009584:Nitrogen