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https://www.readbyqxmd.com/read/28523619/effect-of-calcium-bentonite-on-zn-and-cu-mobility-and-their-accumulation-in-vegetable-growth-in-soil-amended-with-compost-during-consecutive-planting
#1
Quan Wang, Mukesh Kumar Awasthi, Xiuna Ren, Junchao Zhao, Ronghua Li, Feng Shen, Zengqiang Zhang
In this study, greenhouse pot experiment was carried out to investigate the Cu and Zn mobility and their accumulations in pakchoi (Brassica chinensis L.) and Chinese cabbage (Brassica rapachinensis L.) growth in Ca-bentonite-pig manure co-compost (CBC)-soil system during three consecutive planting. Five composts (0, 2.5, 5, 7.5, and 10% Ca-bentonite-pig manure co-composts) amended soil with 5% (w/w) application rate and compared to control without any additive. The results showed that the addition of CBC increased the biomass and chlorophyll content of pakchoi, and the maximum overall yield was found in 7...
May 18, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28511351/effects-of-various-fertilization-regimes-on-abundance-and-activity-of-anaerobic-ammonium-oxidation-bacteria-in-rice-wheat-cropping-systems-in-china
#2
Chao Gu, Huifang Zhou, Qichun Zhang, Yuhua Zhao, Hongjie Di, Yongchao Liang
Anaerobic ammonium oxidation (anammox) is an important process in many marine and paddy ecosystems. However, few studies have reported on the contribution to the nitrogen cycle of anammox and its dynamics in rice-wheat cropping systems with different fertilization regimes. Here, isotope tracing and molecular techniques were used to determine the potential rates of anammox and their association with bacterial abundance, diversity, and activity. Rice-wheat cropping systems at two sites in Jiangsu Province, China were selected and the treatments at each site were: 1) no fertilization (CK), 2) 100% chemical fertilization (CF), 3) pig manure compost plus 50% chemical fertilization (PMCF), and 4) straw plus 100% chemical fertilization (SRCF)...
May 12, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28481880/a-link-between-damaging-behaviour-in-pigs-sanitary-conditions-and-dietary-protein-and-amino-acid-supply
#3
Yvonne van der Meer, Walter J J Gerrits, Alfons J M Jansman, Bas Kemp, J Elizabeth Bolhuis
The tendency to reduce crude protein (CP) levels in pig diets to increase protein efficiency may increase the occurrence of damaging behaviours such as ear and tail biting, particularly for pigs kept under suboptimal health conditions. We studied, in a 2×2×2 factorial design, 576 tail-docked growing-finishing entire male pigs in 64 pens, subjected to low (LSC) vs. high sanitary conditions (HSC), and fed a normal CP (NP) vs. a low CP diet (LP, 80% of NP) ad libitum, with a basal amino acid (AA) profile or supplemented AA profile with extra threonine, tryptophan and methionine...
2017: PloS One
https://www.readbyqxmd.com/read/28464983/effect-of-magnetite-powder-on-anaerobic-co-digestion-of-pig-manure-and-wheat-straw
#4
Yanzi Wang, Guangxin Ren, Tong Zhang, Shuzhen Zou, Chunlan Mao, Xiaojiao Wang
This study investigated the effects of different amounts of magnetite powder (i.e., 0g, 1.5g, 3g, 4.5g, 6g) on the anaerobic co-digestion of pig manure (PM) and wheat straw (WS). The variations in pH, alkalinity, cellulase activity (CEA), dehydrogenase activity (DHA) and methane production, were analyzed by phases. Correlation of the activities of the two enzymes with methane production was also analyzed, and the Gompertz model was used to evaluate the efficiency of anaerobic digestion (AD) with the addition of magnetite powder...
April 29, 2017: Waste Management
https://www.readbyqxmd.com/read/28448788/production-of-biogas-from-co-digestion-of-livestock-and-agricultural-residues-a-case-study
#5
Brahim Arhoun, Cesar Gomez-Lahoz, Roberto Teofilo Abdala-Diaz, Jose Miguel Rodriguez-Maroto, Francisco Garcia-Herruzo, Carlos Vereda-Alonso
This study was undertaken to determine the possible changes in the digester yield and performance for the anaerobic co-digestion under mesophilic conditions of strawberry residues (SRs) together with pig manure (PM). The first part of this paper deals with the digestion of SR as a single substrate. For organic loading rates (OLRs) of 4.4 (g L(-1) d(-1)) or less, the experimental specific biogas and methane productions are 0.588 and 0.231 L g(-1), respectively. When higher OLRs (5.5 g L(-1) d(-1)) are used the digester fails due to acidification...
April 27, 2017: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/28444567/the-behavior-of-antibiotic-resistance-genes-and-arsenic-influenced-by-biochar-during-different-manure-composting
#6
Erping Cui, Ying Wu, Yanan Jiao, Yiru Zuo, Christopher Rensing, Hong Chen
The effect of two different biochar types, rice straw biochar (RSB) and mushroom biochar (MB), on chicken manure composting was previously examined by monitoring the fate of antibiotic resistance genes (ARGs) and arsenic. The behavior of ARGs and arsenic in other kinds of manure composting with the same biochar types had not been examined. In this study, we added either RSB or MB to pig and duck manure composts to study the behavior of ARGs (tet genes, sul genes, and chloramphenicol resistance genes) and arsenic under the same experimental condition...
April 25, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28408756/apple-pomace-improves-the-quality-of-pig-manure-aerobic-compost-by-reducing-emissions-of-nh3-and-n2o
#7
Hui Mao, Teng Zhang, Ronghua Li, Bingnian Zhai, Zhaohui Wang, Quan Wang, Zengqiang Zhang
In this study, the effects of apple pomace (AP) addition (0%, 5%, 10%, and 20% on a dry weight basis, named as control, AP1, AP2, and AP3) and citric acid (CA) addition on nitrogen conservation were investigated during aerobic composting of pig manure. Gaseous emissions of NH3 and N2O were inhibited by AP and CA addition, with AP's effect greater. The inhibition improved with increasing AP addition. The AP3 treatment was the most effective on NH3 adsorption and transformation to [Formula: see text]-N, improved with subsequent transformation to [Formula: see text]-N, and inhibition of N2O and [Formula: see text] production...
April 13, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28405460/provision-of-straw-by-a-foraging-tower-effect-on-tail-biting-in-weaners-and-fattening-pigs
#8
Carolin Holling, Elisabeth Grosse Beilage, Beatriz Vidondo, Christina Nathues
BACKGROUND: Straw is one of the most effective rooting materials to reduce tail biting in pigs. A so-called foraging-tower (FT) provides only small quantities of straw compatible with liquid manure systems. The focus of the present study was on the effect of providing straw by FT in order to prevent tail biting in tail docked pigs. Four consecutive batches of 160 pigs, randomly divided into a straw (SG) and a control group (CG) were followed up from weaning to slaughter. RESULTS: Tail wounds (Score ≥ 2) were detected in 104 out of 12,032 single observations (SG n = 48; CG n = 56) in 9 pens (SG n = 4/32; CG n = 5/32) mainly focused on the fattening period of batch 2 due to a failure in the ventilation system...
2017: Porcine Health Management
https://www.readbyqxmd.com/read/28400002/salmonella-weltevreden-in-integrated-and-non-integrated-tilapia-aquaculture-systems-in-guangdong-china
#9
Kang Li, Gitte Petersen, Lisa Barco, Kristian Hvidtfeldt, Liping Liu, Anders Dalsgaard
Integrated tilapia-pig farming, which uses manure from pigs as fertilizers in fish pond, is a traditional and common production system practised by small-scale farmers in South-east Asia. Although such systems may be environmentally sustainable, they also pose potential food safety hazards including transmission of faecal zoonotic pathogens and accumulation of antimicrobial and other chemical residues. This study aimed to determine differences in occurrence and characteristics of Salmonella spp. isolated from tilapia-pig and non-integrated aquaculture systems in Guangdong province, China...
August 2017: Food Microbiology
https://www.readbyqxmd.com/read/28396169/the-effect-of-airflow-rates-and-aeration-mode-on-the-respiration-activity-of-four-organic-wastes-implications-on-the-composting-process
#10
Laura Mejias, Dimitrios Komilis, Teresa Gea, Antoni Sánchez
The aim of this study was to assess the effect of the airflow and of the aeration mode on the composting process of non-urban organic wastes that are found in large quantities worldwide, namely: (i) a fresh, non-digested, sewage sludge (FSS), (ii) an anaerobically digested sewage sludge (ADSS), (iii) cow manure (CM) and (iv) pig sludge (PS). This assessment was done using respirometric indices. Two aeration modes were tested, namely: (a) a constant air flowrate set at three different initial fixed airflow rates, and (b) an oxygen uptake rate (OUR)-controlled airflow rate...
April 7, 2017: Waste Management
https://www.readbyqxmd.com/read/28394116/improvement-of-soil-ecosystem-multifunctionality-by-dissipating-manure-induced-antibiotics-and-resistance-genes
#11
Yuting Liang, Meng Pei, Dandan Wang, Shengnan Cao, Xian Xiao, Bo Sun
The application of animal manure containing antibiotic residues to farmlands as an organic fertilizer causes a long-term potential threat to the ecological environment of farmland. This study analyzed the effects of abating typical antibiotics and resistance genes (ARGs) applied with pig manure on farmland soil as well as on soil ecosystem multifunctionality (EMF) and its influencing factor. The results showed that Lolium multiflorum exhibited significantly stronger abatement of typical antibiotics and ARGs when combined with biochar than when used alone (p < 0...
April 13, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28391157/contrasting-effects-of-composting-and-pyrolysis-on-bioavailability-and-speciation-of-cu-and-zn-in-pig-manure
#12
Jun Meng, Lu Wang, Libin Zhong, Xingmei Liu, Philip C Brookes, Jianming Xu, Hongjin Chen
The intensive and unregulated application of feed additives to commercial pig foods has resulted in high levels of Cu and Zn in pig manure. The aim of this study was to assess the impacts of composting and pyrolysis processes on the bioavailability and chemical speciation of Cu and Zn in pig manure products by single and sequential extractions, and to compare metal bioavailability in composts and biochar-amended soils in incubation experiments. Composting and pyrolysis processes can convert exchangeable and carbonate-bound Cu and Zn to organic matter and residual fractions, and significantly reduce the potential availability of metals in composts and biochars...
April 3, 2017: Chemosphere
https://www.readbyqxmd.com/read/28391144/sources-and-fate-of-antimicrobials-in-integrated-fish-pig-and-non-integrated-tilapia-farms
#13
Kang Li, Liping Liu, Jia Zhan, Marie-Louise Scippo, Kristian Hvidtfeldt, Yuan Liu, Anders Dalsgaard
Antimicrobial contamination in aquaculture products constitutes a food safety hazard, but little is known about the introduction and accumulation of antimicrobials in integrated fish-pig aquaculture. This study, conducted in 2013, aimed to determine the residues of 11 types of antimicrobials by UPLC-MS/MS analysis in fish feed (n=37), pig feed (n=9), pig manure (n=9), pond sediment (n=20), fish skin (n=20) and muscle tissue (n=20) sampled from integrated tilapia-pig farms, non-integrated tilapia farms and fish feed supply shops...
October 1, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28380565/ammonia-concentrations-and-emissions-from-finishing-pigs-reared-in-different-growing-rooms
#14
Annamaria Costa
Even with the adoption of Best Available Techniques (BAT) standards, pig producers have observed different degrees of fouling on the floor during the finishing phase. These differences depend on the excretory behavior of pigs reared in different growing facilities. Our objectives in this study were to measure ammonia (NH) concentrations and emissions from finishing pigs reared in different growing rooms and subsequently housed in identical BAT room types. The 1600 pigs used in the study were reared in growing rooms with a slatted floor and a vacuum system for manure removal (WSF) or in growing rooms with a solid floor and an outside alley and storage pit (WCF)...
March 2017: Journal of Environmental Quality
https://www.readbyqxmd.com/read/28380535/effects-of-dirty-housing-and-a-typhimurium-dt104-challenge-on-pig-growth-performance-diet-utilization-efficiency-and-gas-emissions-from-stored-manure
#15
M M Li, K M Seelenbinder, M A Ponder, L Deng, R P Rhoads, K D Pelzer, J S Radcliffe, C V Maxwell, J A Ogejo, R R White, M D Hanigan
The objectives of this study were to elucidate the effects of a dirty environment and a challenge plus associated environmental contamination on pig growth performance, diet utilization efficiency, and gas emissions (CO, NH, CH, NO, and HS) from stored manure. Twenty-four weaned barrows, aged 31 d at initiation of the trial, were randomly allotted to 3 different treatments in a completely randomized design. Treatments were: pigs housed in cages with manure removed and cages washed daily (Clean); pigs housed in cages sprayed daily with manure slurry mixtures (Dirty); or pigs challenged with Typhimurium DT104 and housed in cages that were not washed, but manure was removed daily ( challenge)...
March 2017: Journal of Animal Science
https://www.readbyqxmd.com/read/28376384/bio-and-hydrochars-from-rice-straw-and-pig-manure-inter-comparison
#16
Yuxue Liu, Shuai Yao, Yuying Wang, Haohao Lu, Satinder Kaur Brar, Shengmao Yang
Conversion of rice straw (RS) and pig manure (PM) into chars is a promising disposal/recycling option. Herein, pyrolysis and hydrothermal carbonization were used to produce bio- and hydrochars from RS and PM, affording lower biochar (300-700°C) and hydrochar (180-300°C) yields at higher temperatures within the specified range. The C contents and C/N ratios of RS chars were higher than those of PM ones, with the opposite trend observed for yield and ash content. C and ash contents increased with increasing temperature, whereas H/C, O/C, and (O+N)/C ratios decreased...
March 21, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28357796/effect-of-microscale-zvi-magnetite-on-methane-production-and-bioavailability-of-heavy-metals-during-anaerobic-digestion-of-diluted-pig-manure
#17
Yue-Gan Liang, Xiu-Juan Li, Jin Zhang, Li-Gan Zhang, Beijiu Cheng
Low methane production and high levels of heavy metal in pig slurries limit the feasibility of anaerobic digestion of pig manure. In this study, changes in the methane production and bioavailability of heavy metals in the anaerobic digestion of diluted pig manure were evaluated using single and combined action of microscale zero-valence iron (ZVI) and magnetite. After 30 days of anaerobic digestion, the methane yield ranged from 246.9 to 334.5 mL/g VS added, which increased by 20-26% in the group added with microscale ZVI and/or magnetite relative to that in the control group...
May 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28346909/bioaugmentaton-in-technosols-created-in-abandoned-pyritic-tailings-can-contribute-to-enhance-soil-c-sequestration-and-plant-colonization
#18
Raúl Zornoza, Melisa Gómez-Garrido, Silvia Martínez-Martínez, María Dolores Gómez-López, Ángel Faz
Creation of Technosols in combination with phytostabilization may be a sustainable strategy to minimize the environmental and human health hazards derived from mine tailings. Bioaugmentation can facilitate plant establishment and growth for efficient phytostabilization. In order to assess if bioaugmentation can increase soil quality and fertility, decrease metal(loid) mobility and accelerate plant colonization, a one-year field experiment was designed with creation of Technosols in two tailings ponds with different pH (acidic (AT) and neutral (NT)), with addition of marble waste (MaW) and two organic materials (pig manure (PM) and sewage sludge (SS), without or with inoculation of effective microorganisms (EM) at three rates...
March 24, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28324249/evaluation-of-organic-amendment-on-the-effect-of-cadmium-bioavailability-in-contaminated-soils-using-the-dgt-technique-and-traditional-methods
#19
EDITORIAL
Yu Yao, Qin Sun, Chao Wang, Pei-Fang Wang, Shi-Ming Ding
Organic amendments have been widely proposed as a remediation technology for metal-contaminated soils, but there exist controversial results on their effectiveness. In this study, the effect of pig manure addition on cadmium (Cd) bioavailability in Cd-contaminated soils was systematically evaluated by one dynamic, in situ technique of diffusive gradients in thin films (DGT) and four traditional methods based on the equilibrium theory (soil solution concentration and the three commonly used extractants, i.e...
March 21, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28319770/mechanisms-and-effects-of-arsanilic-acid-on-antibiotic-resistance-genes-and-microbial-communities-during-pig-manure-digestion
#20
Wei Sun, Xun Qian, Jie Gu, Xiao-Juan Wang, Li Zhang, Ai-Yun Guo
High concentrations of residual arsanilic acid occur in pig manure due to its use in feed to promote growth and control diseases. This study compared the effects of arsanilic acid at three concentrations (0, 325, and 650mg/kg dry pig manure) on the abundance of antibiotic resistance genes (ARGs) and the microbial community during anaerobic digestion. Addition of 650mg/kg arsanilic acid enhanced the absolute abundances of tetC, sul2, ermB, and gyrA more than twofold in the digestion product. Redundancy analysis indicated that the change in the microbial community structure was the main driver of variation in the ARGs profile...
March 8, 2017: Bioresource Technology
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