keyword
MENU ▼
Read by QxMD icon Read
search

Soil fertility

keyword
https://www.readbyqxmd.com/read/28214113/classification-and-assessment-models-of-first-year-byproducts-nitrogen-plant-availability-from-literature-data
#1
Claude-Alla Joseph, Lotfi Khiari, Jacques Gallichand, Sidki Bouslama
Byproducts can provide an important amount of nutrients for crops and improve soils properties. According to their C/N, nitrogen (N) mineralization or immobilization may be observed after their application onto agricultural land. Therefore, an indicator is needed to assess byproducts N availability for crops. Thirty-seven studies from the scientific literature on N mineralization or immobilization after application to agricultural land under a wide range of climatic and experimental conditions were collected in order to elaborate models assessing non-composted byproducts N availability during the first growing season according to the C/N ratio...
February 14, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28213705/responses-of-soil-methanogens-methanotrophs-and-methane-fluxes-to-land-use-conversion-and-fertilization-in-a-hilly-red-soil-region-of-southern-china
#2
Huifeng Liu, Xing Wu, Zongshan Li, Qing Wang, Dan Liu, Guohua Liu
Changes in land-uses and fertilization are important factors regulating methane (CH4) emissions from paddy soils. However, the responses of soil CH4 emissions to these factors and the underlying mechanisms remain unclear. The objective of this study was to explore the effects of land-use conversion from paddies to orchards and fertilization on soil CH4 fluxes, and the abundance and community compositions of methanogens and methanotrophs. Soil CH4 fluxes were quantified by static chamber and gas chromatography technology...
February 17, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28213306/phosphorous-extractability-and-ryegrass-availability-from-bio-waste-composts-in-a-calcareous-soil
#3
Marco Grigatti, Elisa Boanini, Silvia Mancarella, Andrea Simoni, Massimo Centemero, Adrie H M Veeken
In this work four stable bio-waste composts (C1, C2, C3, C4) were selected on the basis of their increasing water soluble P (H2O-P). The P speciation was assessed via sequential chemical extraction (SCE) on the same products. Moreover, the plant-available P was assessed via apparent recovery fraction approach (ARF) in a pot test on ryegrass over 21 weeks at 15 mg P kg(-)(1) of soil. An inorganic P source (P-chem) was added as a reference at the same P rate in addition to a non-fertilized control (Control)...
February 6, 2017: Chemosphere
https://www.readbyqxmd.com/read/28203619/variation-in-the-response-of-eastern-and-southern-africa-provenances-of-faidherbia-albida-delile-a-chev-seedlings-to-water-supply-a-greenhouse-experiment
#4
Grace Koech, Daniel Ofori, Anne W T Muigai, Jonathan Muriuki, Parveen Anjarwalla, Jan De Leeuw, Jeremias G Mowo
Rural communities value Faidherbia albida in farming systems and pastoralism. Faidherbia albida provides products such as medicine, fodder, fuel, wood, food and services such as shade, soil fertility and nutrient cycling. Excessive browsing by animals, branch lopping and pod harvesting, have critically reduced the natural regeneration in some areas which exposes it to challenges due to dependence upon natural regeneration. The objective of this research was to evaluate response of Faidherbia albida provenances from eastern (Taveta Wangingombe) and southern Africa (Lupaso, Kuiseb Manapools) to different watering regimes to aid in selection of provenances for domestication...
October 2016: Global Ecology and Conservation
https://www.readbyqxmd.com/read/28199875/examining-the-impacts-of-increased-corn-production-on-groundwater-quality-using-a-coupled-modeling-system
#5
Valerie Garcia, Ellen Cooter, James Crooks, Brian Hinckley, Mark Murphy, Xiangnan Xing
This study demonstrates the value of a coupled chemical transport modeling system for investigating groundwater nitrate contamination responses associated with nitrogen (N) fertilizer application and increased corn production. The coupled Community Multiscale Air Quality Bidirectional and Environmental Policy Integrated Climate modeling system incorporates agricultural management practices and N exchange processes between the soil and atmosphere to estimate levels of N that may volatilize into the atmosphere, re-deposit, and seep or flow into surface and groundwater...
February 12, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28199354/nitrate-capture-and-slow-release-in-biochar-amended-compost-and-soil
#6
Nikolas Hagemann, Claudia I Kammann, Hans-Peter Schmidt, Andreas Kappler, Sebastian Behrens
Slow release of nitrate by charred organic matter used as a soil amendment (i.e. biochar) was recently suggested as potential mechanism of nutrient delivery to plants which may explain some agronomic benefits of biochar. So far, isolated soil-aged and composted biochar particles were shown to release considerable amounts of nitrate only in extended (>1 h) extractions ("slow release"). In this study, we quantified nitrate and ammonium release by biochar-amended soil and compost during up to 167 h of repeated extractions in up to six consecutive steps to determine the effect of biochar on the overall mineral nitrogen retention...
2017: PloS One
https://www.readbyqxmd.com/read/28198039/combined-environmental-risk-assessment-for-the-antiviral-pharmaceuticals-ganciclovir-and-valganciclovir-in-europe
#7
Jürg Oliver Straub
Potential environmental risks of the old antiviral pharmaceuticals ganciclovir (GCV) and valganciclovir (VGCV) were re-assessed based on new environmental fate and chronic ecotoxicity tests and on actual use data for Europe. VGCV is hydrolyzed to GCV by intestinal and hepatic esterases, hence the new environmental tests only refer to GCV. A sorption study showed that GCV will not sorb significantly, excluding the soil as a relevant environmental compartment. Despite earlier data suggesting non-degradability, a new water/sediment fate test showed GCV to be primarily and ultimately degraded and to be non-persistent...
February 15, 2017: Environmental Toxicology and Chemistry
https://www.readbyqxmd.com/read/28197689/influence-of-straw-incorporation-with-and-without-straw-decomposer-on-soil-bacterial-community-structure-and-function-in-a-rice-wheat-cropping-system
#8
Jun Zhao, Tian Ni, Weibing Xun, Xiaolei Huang, Qiwei Huang, Wei Ran, Biao Shen, Ruifu Zhang, Qirong Shen
To study the influence of straw incorporation with and without straw decomposer on bacterial community structure and biological traits, a 3-year field experiments, including four treatments: control without fertilizer (CK), chemical fertilizer (NPK), chemical fertilizer plus 7500 kg ha(-1) straw incorporation (NPKS), and chemical fertilizer plus 7500 kg ha(-1) straw incorporation and 300 kg ha(-1) straw decomposer (NPKSD), were performed in a rice-wheat cropping system in Changshu (CS) and Jintan (JT) city, respectively...
February 14, 2017: Applied Microbiology and Biotechnology
https://www.readbyqxmd.com/read/28196685/geochemical-analysis-of-sediments-from-a-semi-enclosed-bay-dongshan-bay-southeast-china-to-determine-the-anthropogenic-impact-and-source
#9
Yonghang Xu, Qinqin Sun, Xiang Ye, Xijie Yin, Dongyi Li, Liang Wang, Aijun Wang, Yunhai Li
The geochemical compositions of sediments in the Dongshan Bay, a semi-enclosed bay on the southeast coast of China, were obtained to identify pollutant sources and evaluate the anthropogenic impacts over the last 100 years. The results indicated that the metal flux had been increasing since the 1980s. Enrichment factor values (Pb, Zn and Cu) suggested only slight enrichment. The proportion of anthropogenic Pb changed from 9% to 15% during 2000-2014. Coal combustion might be an important contamination source in the Dongshan Bay...
January 17, 2017: Chemosphere
https://www.readbyqxmd.com/read/28195207/spatial-distribution-of-soil-organic-carbon-stock-in-moso-bamboo-forests-in-subtropical-china
#10
Xiaolu Tang, Mingpeng Xia, César Pérez-Cruzado, Fengying Guan, Shaohui Fan
Moso bamboo (Phyllostachys heterocycla (Carr.) Mitford cv. Pubescens) is an important timber substitute in China. Site specific stand management requires an accurate estimate of soil organic carbon (SOC) stock for maintaining stand productivity and understanding global carbon cycling. This study compared ordinary kriging (OK) and inverse distance weighting (IDW) approaches to study the spatial distribution of SOC stock within 0-60 cm using 111 soil samples in Moso bamboo forests in subtropical China. Similar spatial patterns but different spatial distribution ranges of SOC stock from OK and IDW highlighted the necessity to apply different approaches to obtain accurate and consistent results of SOC stock distribution...
February 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28194679/soil-properties-and-microbial-ecology-of-a-paddy-field-after-repeated-applications-of-domestic-and-industrial-sewage-sludges
#11
Xiaoyan Liu, Wuxing Liu, Qingling Wang, Longhua Wu, Yongming Luo, Peter Christie
The effects of repeated application of two types of sewage sludge, domestic and industrial (petrochemical, PSS) sludges, into paddy fields over a 5-year period on the soil properties and microbial ecology were studied and compared with conventional NPK fertilizer application. Soil organic matter and total nitrogen contents were significantly higher in the two sludge treatments than that in fertilized plots after 5 years. Soil concentrations of potentially toxic metals were low after 5 years of both sludge treatments, but the polycyclic aromatic hydrocarbons (PAHs) showed differences between the two sludge types...
February 14, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28194156/integrated-management-strategies-increase-cottonseed-oil-and-protein-production-the-key-role-of-carbohydrate-metabolism
#12
Hongkun Yang, Xinyue Zhang, Binglin Chen, Yali Meng, Youhua Wang, Wenqing Zhao, Zhiguo Zhou
Cottonseed, oil, and protein, as the by-products of cotton production, have the potential to provide commodities to meet the increasing demand of renewable bio-fuels and ruminant feed. An increase in crop yield per unit area requires high-yielding cultivar management with an economic nitrogen (N) rate, an optimal N application schedule, high-yielding plant populations and strong seedlings. Whether the integration of these agronomic practices into a coherent management system can increase the productivity of cotton fiber, embryo oil and protein requires experimental elucidation...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28192496/impact-of-nitrogen-fertilization-on-soil-atmosphere-greenhouse-gas-exchanges-in-eucalypt-plantations-with-different-soil-characteristics-in-southern-china
#13
Kai Zhang, Hua Zheng, Falin Chen, Ruida Li, Miao Yang, Zhiyun Ouyang, Jun Lan, Xuewu Xiang
Nitrogen (N) fertilization is necessary to sustain productivity in eucalypt plantations, but it can increase the risk of greenhouse gas emissions. However, the response of soil greenhouse gas emissions to N fertilization might be influenced by soil characteristics, which is of great significance for accurately assessing greenhouse gas budgets and scientific fertilization in plantations. We conducted a two-year N fertilization experiment (control [CK], low N [LN], middle N [MN] and high N [HN] fertilization) in two eucalypt plantations with different soil characteristics (higher and lower soil organic carbon sites [HSOC and LSOC]) in Guangxi, China, and assessed soil-atmosphere greenhouse gas exchanges...
2017: PloS One
https://www.readbyqxmd.com/read/28188339/microbial-composition-and-diversity-are-associated-with-plant-performance-a-case-study-on-long-term-fertilization-effect-on-wheat-growth-in-an-ultisol
#14
Lihua Li, Fenliang Fan, Alin Song, Chang Yin, Peiyuan Cui, Zhaojun Li, Yongchao Liang
The association between microbial communities and plant growth in long-term fertilization system has not been fully studied. In the present study, impacts of long-term fertilization have been determined on the size and activity of soil microbial communities and wheat performance in a red soil (Ultisol) collected from Qiyang Experimental Station, China. For this, different microbial communities originating from long-term fertilized pig manure (M), mineral fertilizer (NPK), pig manure plus mineral fertilizer (MNPK), and no fertilizer (CK) were used as inocula for the Ultisol tested...
February 10, 2017: Applied Microbiology and Biotechnology
https://www.readbyqxmd.com/read/28187939/responses-of-manure-decomposition-to-nitrogen-addition-role-of-chemical-composition
#15
Yehong Xu, Zengming Chen, Weixin Ding, Jianling Fan
Understanding the interactions among organic manure chemical composition, decomposition and nitrogen (N) fertilization is critical for sustainable agriculture management. Six organic manures were incubated in a cultivated black soil with or without N addition for one year, and carbon dioxide (CO2) emissions from these organic manures were monitored. Chemical compositions of the organic manures were determined by elemental analysis, proximate chemical analysis, and carbon (C)-13 nuclear magnetic resonance spectroscopy, and evaluated after cupric-oxide oxidation for lignin biomarkers...
February 8, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28186361/habitat-as-a-mediator-of-mesopredator-driven-mammal-extinction
#16
Peter J McDonald, Catherine E M Nano, Simon J Ward, Alistair Stewart, Chris R Pavey, Gary W Luck, Chris R Dickman
A prevailing view in dryland systems is that mammals are constrained by the scarcity of fertile soils and primary productivity. An alternative view is that predation is a primary driver of mammal assemblages, especially in Australia, where two introduced mesopredators - the feral cat Felis catus and red fox Vulpes vulpes - have decimated the dryland mammal fauna. We evaluate productivity (bottom-up) versus predation (top-down) as drivers of native mammal assemblage structure in dryland Australia. We find that predation is likely a major driver of extant mammal richness, but that its effect is strongly mediated by habitat type...
February 10, 2017: Conservation Biology: the Journal of the Society for Conservation Biology
https://www.readbyqxmd.com/read/28184227/using-ceres-maize-and-enso-as-decision-support-tools-to-evaluate-climate-sensitive-farm-management-practices-for-maize-production-in-the-northern-regions-of-ghana
#17
Dilys S MacCarthy, Samuel G K Adiku, Bright S Freduah, Francis Gbefo, Alpha Y Kamara
Maize (Zea mays) has traditionally been a major cereal staple in southern Ghana. Through breeding and other crop improvement efforts, the zone of cultivation of maize has now extended to the northern regions of Ghana which, hitherto, were the home to sorghum and millet as the major cereals. Maize yield in the northern Ghana is hampered by three major biophysical constraints, namely, poor soil fertility, low soil water storage capacity and climate variability. In this study we used the DSSAT crop model to assess integrated water and soil management strategies that combined the pre-season El-Niño-Southern Oscillation (ENSO)-based weather forecasting in selecting optimal planting time, at four locations in the northern regions of Ghana...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28183027/effect-of-biochars-produced-from-solid-organic-municipal-waste-on-soil-quality-parameters
#18
P Randolph, R R Bansode, O A Hassan, Dj Rehrah, R Ravella, M R Reddy, D W Watts, J M Novak, M Ahmedna
New value-added uses for solid municipal waste are needed for environmental and economic sustainability. Fortunately, value-added biochars can be produced from mixed solid waste, thereby addressing solid waste management issues, and enabling long-term carbon sequestration. We hypothesize that soil deficiencies can be remedied by the application of municipal waste-based biochars. Select municipal organic wastes (newspaper, cardboard, woodchips and landscaping residues) individually or in a 25% blend of all four waste streams were used as feedstocks of biochars...
February 6, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28181569/long-term-nitrogen-fertilization-decreased-the-abundance-of-inorganic-phosphate-solubilizing-bacteria-in-an-alkaline-soil
#19
Bang-Xiao Zheng, Xiu-Li Hao, Kai Ding, Guo-Wei Zhou, Qing-Lin Chen, Jia-Bao Zhang, Yong-Guan Zhu
Inorganic phosphate solubilizing bacteria (iPSB) are essential to facilitate phosphorus (P) mobilization in alkaline soil, however, the phylogenetic structure of iPSB communities remains poorly characterized. Thus, we use a reference iPSB database to analyze the distribution of iPSB communities based on 16S rRNA gene illumina sequencing. Additionally, a noval pqqC primer was developed to quantify iPSB abundance. In our study, an alkaline soil with 27-year fertilization treatment was selected. The percentage of iPSB was 1...
February 9, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28177786/response-of-microbial-communities-to-roxarsone-under-different-culture-conditions
#20
Yaci Liu, Zhaoji Zhang, Yasong Li, Yuhong Fei
Roxarsone is a feed additive widely used in broiler and swine industry that has the potential to contaminate environment, mainly via the use of poultry manure as fertilizer, which results in release of inorganic arsenic to the soil and water. This study was conducted to investigate the roxarsone degradation and the response of microbial community under different culture conditions using high-throughput sequencing technology. Poultry litter was incubated for 288 h in the presence of roxarsone under light aerobic, dark aerobic, or dark anaerobic conditions, showing that roxarsone was completely degraded after 48 h of dark anaerobic incubation, while 79...
January 20, 2017: Canadian Journal of Microbiology
keyword
keyword
55235
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"