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https://www.readbyqxmd.com/read/28646395/translocation-of-trace-elements-from-sewage-sludge-amendments-to-plants-in-a-reclaimed-area
#1
Wiktor Halecki, Sławomir Klatka
The goal of the study was to evaluate bioaccumulation of trace elements in plants grown in post-mining soils amended with the biosolids material. Phaseolus vulgaris was investigated on the laboratory scale, and a mixture of grasses, Melilotus albus, Beta vulgaris, Zea mays L. and Miscanthus × giganteus were evaluated on the field scale. The results of the research showed that P. vulgaris fertilized with the Carbocrash substrate was able to grow. In addition, growth was enhanced following stimulation with gibberellic acid...
June 23, 2017: Bulletin of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/28644397/relationship-between-remote-sensing-data-plant-biomass-and-soil-nitrogen-dynamics-in-intensively-managed-grasslands-under-controlled-conditions
#2
Christoph Knoblauch, Conor Watson, Clara Berendonk, Rolf Becker, Nicole Wrage-Mönnig, Florian Wichern
The sustainable use of grasslands in intensive farming systems aims to optimize nitrogen (N) inputs to increase crop yields and decrease harmful losses to the environment at the same time. To achieve this, simple optical sensors may provide a non-destructive, time- and cost-effective tool for estimating plant biomass in the field, considering spatial and temporal variability. However, the plant growth and related N uptake is affected by the available N in the soil, and therefore, N mineralization and N losses...
June 23, 2017: Sensors
https://www.readbyqxmd.com/read/28643581/a-white-paper-on-global-wheat-health-based-on-scenario-development-and-analysis
#3
Serge Savary, Annika Djurle, Jonathan Yuen, Andrea Ficke, Vittorio Rossi, Paul Esker, Jose M Fernandes, Emerson Del Ponte, Jatindra Kumar, Laurence V Madden, Pierce A Paul, Neil McRoberts, Pawan Kumar Singh, Laurent Huber, Claude Pope de Vallavieille, Sébastien Saint-Jean, Laetitia Willocquet
Scenario analysis constitutes a useful approach to synthesize knowledge and derive hypotheses in the case of complex systems which are documented with mainly qualitative or very diverse information. In this article, a framework for scenario analysis is designed and then, applied to global wheat health within a timeframe from today to 2050. Scenario analysis entails the choice of settings, the definition of scenarios of change, and the analysis of outcomes of these scenarios in the chosen settings. Three idealized agrosystems, representing a large fraction of the global diversity of wheat-based agrosystems, are considered, which represent the settings of the analysis...
June 23, 2017: Phytopathology
https://www.readbyqxmd.com/read/28642768/silicon-transporters-and-effects-of-silicon-amendments-in-strawberry-under-high-tunnel-and-field-conditions
#4
Samuel Ouellette, Marie-Hélène Goyette, Caroline Labbé, Joan Laur, Linda Gaudreau, André Gosselin, Martine Dorais, Rupesh K Deshmukh, Richard R Bélanger
Together with longer production periods, the commercial transition to day-neutral strawberry (Fragaria × ananassa) varieties has favored the development of diseases such as powdery mildew (Podosphaera aphanis) that thrives in late summer-early fall. In an attempt to find alternative solutions to fungicides currently employed to curb the disease, we wanted to investigate the potential of silicon (Si) amendments that have been associated with prophylactic properties against powdery mildews. To this end, our first objective was to determine if strawberry was a Si-competent species following the recent characterization of the properties of Si transporters that plants must carry to uptake silicic acid...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28641404/ph-rather-than-nitrification-and-urease-inhibitors-determines-the-community-of-ammonia-oxidizers-in-a-vegetable-soil
#5
Ruijiao Xi, Xi-En Long, Sha Huang, Huaiying Yao
Nitrification inhibitors and urease inhibitors, such as nitrapyrin and N-(n-butyl) thiophosphoric triamide (NBPT), can improve the efficiencies of nitrogen fertilizers in cropland. However, their effects on ammonia-oxidizing archaea (AOA) and ammonia-oxidizing bacteria (AOB) across different soil pH levels are still unclear. In the present work, vegetable soils at four pH levels were tested to determine the impacts of nitrification and urease inhibitors on the nitrification activities, abundances and diversities of ammonia oxidizers at different pHs by real-time PCR, terminal restriction fragment length polymorphism (T-RFLP) and clone sequence analysis...
December 2017: AMB Express
https://www.readbyqxmd.com/read/28640614/role-of-polymeric-coating-on-the-phosphate-availability-as-fertilizer-insight-from-phosphate-release-in-soil-castor-polyurethane-coatings
#6
Diego Cruz, Ricardo Bortoletto-Santos, Gelton Guimarães, Wagner Luiz Polito, Caue Ribeiro
The coating of fertilizers with polymers is an acknowledged strategy for controlling the release of nutrients and their availability in soil. However, its effectiveness in the case of soluble phosphate fertilizers is still uncertain, and information is lacking concerning the chemical properties and structures of such coatings. Here, an oil-based hydrophobic polymer system (polyurethane) is proposed for control of the release of phosphorus from diammonium phosphate (DAP) granules. This material was systematically characterized, with evaluation of the delivery mechanism and the availability of phosphate in an acid soil...
June 22, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28639414/brachiaria-grasses-brachiaria-spp-harbor-a-diverse-bacterial-community-with-multiple-attributes-beneficial-to-plant-growth-and-development
#7
Collins Mutai, Joyce Njuguna, Sita Ghimire
Endophytic and plant-associated bacteria were isolated from plants and rhizoplane soil of naturally grown Brachiaria grasses at International Livestock Research Institute in Nairobi, Kenya. Eighty-four bacterial strains were isolated from leaf tissues, root tissues, and rhizoplane soil on nutrient agar and 869 media. All bacterial strains were identified to the lowest possible taxonomic unit using 16S rDNA primers and were characterized for the production of Indole-3-acetic acid, hydrogen cyanide, and ACC deaminase; phosphate solubilization; siderophore production; antifungal properties; and plant biomass production...
June 21, 2017: MicrobiologyOpen
https://www.readbyqxmd.com/read/28638092/from-shifting-cultivation-to-teak-plantation-effect-on-overland-flow-and-sediment-yield-in-a-montane-tropical-catchment
#8
Olivier Ribolzi, Olivier Evrard, Sylvain Huon, Anneke de Rouw, Norbert Silvera, Keo Oudone Latsachack, Bounsamai Soulileuth, Irène Lefèvre, Alain Pierret, Guillaume Lacombe, Oloth Sengtaheuanghoung, Christian Valentin
Soil erosion supplies large quantities of sediments to rivers of Southeastern Asia. It reduces soil fertility of agro-ecosystems located on hillslopes, and it degrades, downstream, water resource quality and leads to the siltation of reservoirs. An increase in the surface area covered with commercial perennial monocultures such as teak plantations is currently observed at the expanse of traditional slash-and-burn cultivation systems in steep montane environments of these regions. The impacts of land-use change on the hydrological response and sediment yields have been investigated in a representative catchment of Laos monitored for 13 years...
June 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28637159/methane-production-and-fertilizing-value-of-organic-waste-organic-matter-characterization-for-a-better-prediction-of-valorization-pathways
#9
Julie Jimenez, Han Lei, Jean-Philippe Steyer, Sabine Houot, Dominique Patureau
Organic wastes are potential sources of both energy as well as crop production fertilizers. Correlations and models, involving organic matter characterization, have been previously described by several authors although there is still a lack in knowledge on the potential of simultaneous predictions of methane and organic fertilizer quality to optimize the wastes treatments. A methodology combining chemical accessibility and fluorescence spectroscopy was used to characterize 82 different organic wastes. Characterization data were compared with the biochemical methane potential (BMP), and with the biodegradable organic carbon obtained by soil incubation (C_bio)...
May 31, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28636976/improving-soil-nutrient-availability-increases-carbon-rhizodeposition-under-maize-and-soybean-in-mollisols
#10
Yunfa Qiao, Shujie Miao, Xiaozeng Han, Shuping Yue, Caixian Tang
Rhizodeposited carbon (C) is an important source of soil organic C, and plays an important role in the C cycle in the soil-plant-atmosphere continuum. However, interactive effects of plant species and soil nutrient availability on C rhizodeposition remain unclear. This experiment examined the effect of soil nutrient availability on C rhizodeposition of C4 maize and C3 soybean with contrasting photosynthetic capacity. The soils (Mollisols) were collected from three treatments of no fertilizer (Control), inorganic fertilizer only (NPK), and NPK plus organic manure (NPKM) in a 24-year fertilization field trial...
June 18, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28636273/long-term-belowground-effects-of-grassland-management-the-key-role-of-liming
#11
Jemma Heyburn, Paul McKenzie, Michael J Crawley, Dario A Fornara
The functioning of human-managed grassland ecosystems strongly depends on how common management practices will affect grassland 'belowground compartment' including soil biogeochemistry and plant roots. Key questions remain about how animal grazing, liming (e.g. the addition of CaCO3 to soils), and nutrient fertilization might affect, in the long-term, soil nutrient cycling and multiple root traits. Here we focus on a mesotrophic grassland located in Berkshire, UK, where contrasting levels of rabbit grazing, liming and different inorganic fertilizers have been applied since 1991...
June 21, 2017: Ecological Applications: a Publication of the Ecological Society of America
https://www.readbyqxmd.com/read/28628300/application-of-struvite-alters-the-antibiotic-resistome-in-soil-rhizosphere-and-phyllosphere
#12
Qing-Lin Chen, Xin-Li An, Yong-Guan Zhu, Jian-Qiang Su, Michael R Gillings, Zhi-Long Ye, Li Cui
Struvite recovered from wastewater is a renewable source of phosphorus and nitrogen and can be used as fertilizer for plant growth. However, antibiotics and resistome can be enriched in the struvite derived from wastewater. Robust understanding of the potential risks after struvite application to soils has remained elusive. Here, we profiled antibiotic resistance genes (ARGs) and mobile genetic elements (MGEs) in struvite, soil, rhizosphere and phyllosphere of Brassica using high-throughput quantitative PCR...
June 19, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28626465/altered-expression-of-osnla1-modulates-pi-accumulation-in-rice-oryza-sativa-l-plants
#13
Sihui Zhong, Kashif Mahmood, Yong-Mei Bi, Steven J Rothstein, Kosala Ranathunge
Current agricultural practices rely on heavy use of fertilizers for increased crop productivity. However, the problems associated with heavy fertilizer use, such as high cost and environmental pollution, require the development of crop species with increased nutrient use efficiency. In this study, by using transgenic approaches, we have revealed the critical role of OsNLA1 in phosphate (Pi) accumulation of rice plants. When grown under sufficient Pi and nitrate levels, OsNLA1 knockdown (Osnla1-1, Osnla1-2, and Osnla1-3) lines accumulated higher Pi content in their shoot tissues compared to wild-type, whereas, over-expression lines (OsNLA1-OE1, OsNLA1-OE2, and OsNLA1-OE3) accumulated the least levels of Pi...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28626450/microbial-phosphorus-solubilization-and-its-potential-for-use-in-sustainable-agriculture
#14
REVIEW
Elizabeth T Alori, Bernard R Glick, Olubukola O Babalola
The use of excess conventional Phosphorus (P) fertilizers to improve agricultural productivity, in order to meet constantly increasing global food demand, potentially causes surface and ground water pollution, waterway eutrophication, soil fertility depletion, and accumulation of toxic elements such as high concentration of selenium (Se), arsenic (As) in the soil. Quite a number of soil microorganisms are capable of solubilizing/mineralizing insoluble soil phosphate to release soluble P and making it available to plants...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28625739/changes-in-the-fine-root-proteome-of-fagus-sylvatica-l-trees-associated-with-p-deficiency-and-amelioration-of-p-deficiency
#15
Christoph-Martin Geilfus, Sebastien Christian Carpentier, Aljoša Zavišić, Andrea Polle
Phosphorus is often the least available macronutrient in soil. Lack in phosphorus has detrimental effect on growth and biomass production of European Fagus sylvatica L., a major trees species in temperate forests. In contrast to leaf tissues, few studies have examined changes in the root system and no study has ever investigated the proteomic changes affected in beech roots by a lack in available phosphate (P). Here, we studied roots of young Fagus sylvatica L. trees in their native soils from two forests sites with contrasting availability of P: one P rich and P poor soil...
June 15, 2017: Journal of Proteomics
https://www.readbyqxmd.com/read/28624599/biodegradable-hydrogel-derived-from-cellulose-acetate-and-edta-as-a-reduction-substrate-of-leaching-npk-compound-fertilizer-and-water-retention-in-soil
#16
André M Senna, Vagner R Botaro
To study the behavior of a biodegradable hydrogel derived from cellulose acetate and ethylenediaminetetraacetic dianhydride (EDTAD), as a reduction substrate of NPK fertilizer in soil. The biodegradable hydrogel (HEDTA) was prepared from cellulose acetate (CA) with a degree substitution (DS) 2.5 by esterification crosslinking with EDTAD catalyzed by triethylamine. We systematically investigated the performance of the HEDTA in the reducing NPK (Ammonium, phosphate and potassium) fertilizer leaching. We also compare the percentage of leaching between the HEDTA and commercial fertilizers...
June 15, 2017: Journal of Controlled Release: Official Journal of the Controlled Release Society
https://www.readbyqxmd.com/read/28623832/a-review-on-in-situ-phytoremediation-of-mine-tailings
#17
REVIEW
Li Wang, Bin Ji, Yuehua Hu, Runqing Liu, Wei Sun
Mine tailings are detrimental to natural plant growth due to their physicochemical characteristics, such as high pH, high salinity, low water retention capacity, high heavy metal concentrations, and deficiencies in soil organic matter and fertility. Thus, the remediation of mine tailings has become a key issue in environmental science and engineering. Phytoremediation, an in situ cost-effective technology, is emerging as the most promising remediation method for mine tailings by introducing tolerant plant species...
June 7, 2017: Chemosphere
https://www.readbyqxmd.com/read/28623819/the-texture-structure-and-nutrient-availability-of-artificial-soil-on-cut-slopes-restored-with-osss-influence-of-restoration-time
#18
Zhiyu Huang, Jiao Chen, Xiaoyan Ai, Ruirui Li, Yingwei Ai, Wei Li
Outside soil spray seeding (OSSS) is widely used to restore cut slopes in southwest of China, and artificial soil is often sprayed onto cut slopes to establish a soil layer for revegetation. The stability of artificial soil layer and its supply of water and nutrients for plants is crucial for successful restoration. To evaluate the long-term effectiveness of OSSS, the texture, structure and nutrient availability of artificial soil were studied, various soil samples were obtained from three cut slopes with different restoration time (restored with OSSS in 1996, 2003 and 2007 respectively) and one natural developed slope (NS)...
June 14, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28623790/effect-of-topsoil-removal-and-selective-countermeasures-on-radiocesium-accumulation-in-rice-plants-in-fukushima-paddy-field
#19
Baolu Yang, Yuichi Onda, Yoshihiro Ohmori, Hitoshi Sekimoto, Toru Fujiwara, Yoshifumi Wakiyama, Kazuya Yoshimura, Junko Takahashi, Xinchao Sun
A wide area of paddy fields was contaminated by radiocesium derived from the Fukushima nuclear accident. Implement of agricultural countermeasures is one of the principle methods to reduce the contamination of rice plants. In this study, the effect of topsoil removal measure and fertilizer application on radiocesium uptake by rice plants was investigated over a four-year period. Some other available countermeasures carried out after the Fukushima nuclear accident were also summarized. The results indicate that the effect of topsoil removal measure on the accumulation of radiocesium in rice plants was effective, but the concentration ratio of radiocesium activity concentration between rice plant and soil increased...
June 14, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28623572/nutritional-fe-mn-ni-and-cr-and-growth-responses-of-rice-plant-affected-by-perennial-application-of-two-bio-solids
#20
Seyed Majid Mousavi, Mohammad Ali Bahmanyar, Hemmatollah Pirdashti, Salahedin Moradi
Trace toxic elements often restrict the land application of different bio-solids in agriculture. In order to evaluate the separate influence of the municipal solid waste compost (MSW), sewage sludge (SS) and combined application with inorganic fertilizers (chemical fertilizer (CF)) on nutritional (Fe, Mn, Ni, and Cr) and growth responses of rice plant, a research was conducted on paddy soil from 2013 to 2015. Obtained results showed that SS levels were superior to MSW in most studied traits. The maximum chlorophyll content (46...
July 2017: Environmental Monitoring and Assessment
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