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Soil fertility

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https://www.readbyqxmd.com/read/29160685/graphene-oxide-a-new-carrier-for-slow-release-of-plant-micronutrients
#1
Shervin Kabiri, Fien Degryse, Diana N H Tran, Rodrigo da Silva, Michael J McLaughlin, Dusan Losic
The environmental problems and low efficiency associated with conventional fertilizers provides an impetus to develop advanced fertilizers with slower release and better performances. Here we report of development of a new carrier platform based on graphene oxide (GO) sheets that can provide a high loading of plant micronutrients with controllable slow release. To prove this concept two micronutrients zinc (Zn) and copper (Cu) were used to load on GO sheets and hence formulate GO-based micronutrients fertilizer...
November 21, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29159455/plant-available-phosphorus-in-soil-as-predictor-for-the-leaching-potential-insights-from-long-term-lysimeter-studies
#2
Holger Rupp, Ralph Meissner, Peter Leinweber
This study aimed to demonstrate the impact of phosphorus (P) mineral fertilization on topsoil P content and P leaching. We evaluated 83 datasets from 25 years from lysimeter experiments involving different cropping systems (winter crop, summer crop and autumn tillage, harvested grass) or unfertilized fallow, four types of soil texture, and three levels of applied mineral P fertilizer. A positive monotonic and significant correlation was indicated between P in the topsoil determined by the double lactate method (P DL) and the yearly flow-weight total (TP) concentrations in leachates with Spearman rank correlations r s (r s > 0...
November 20, 2017: Ambio
https://www.readbyqxmd.com/read/29159453/performance-of-secondary-p-fertilizers-in-pot-experiments-analyzed-by-phosphorus-x-ray-absorption-near-edge-structure-xanes-spectroscopy
#3
Christian Vogel, Camille Rivard, Verena Wilken, Andreas Muskolus, Christian Adam
A pot experiment was carried out with maize to determine the phosphorus (P) plant-availability of different secondary P-fertilizers derived from wastewater. We analyzed the respective soils by P K-edge X-ray absorption near-edge structure (XANES) spectroscopy to determine the P chemical forms that were present and determine the transformation processes. Macro- and micro-XANES spectroscopy were used to determine the chemical state of the overall soil P and identify P compounds in P-rich spots. Mainly organic P and/or P adsorbed on organic matter or other substrates were detected in unfertilized and fertilized soils...
November 20, 2017: Ambio
https://www.readbyqxmd.com/read/29159451/re-evaluation-of-the-yield-response-to-phosphorus-fertilization-based-on-meta-analyses-of-long-term-field-experiments
#4
Uwe Buczko, Michael van Laak, Bettina Eichler-Löbermann, Wolfgang Gans, Ines Merbach, Kerstin Panten, Edgar Peiter, Thomas Reitz, Heide Spiegel, Sabine von Tucher
Phosphorus (P) fertilizer recommendations in most European countries are based on plant-available soil P contents and long-term field experiments. Site-specific conditions are often neglected, resulting in excessive P fertilizer applications. P fertilization experiments including relevant site and soil parameters were evaluated in order to analyze the yield response. The database comprises about 2000 datasets from 30 field experiments from Germany and Austria. Statistical evaluations using a classification and regression tree approach, and multiple linear regression analysis indicate that besides plant-available soil P content, soil texture and soil organic matter content have a large influence on the effectiveness of P fertilization...
November 20, 2017: Ambio
https://www.readbyqxmd.com/read/29156271/fresh-and-composted-industrial-sludge-restore-soil-functions-in-surface-soil-of-degraded-agricultural-land
#5
Muhammad Saleem Arif, Muhammad Riaz, Sher Muhammad Shahzad, Tahira Yasmeen, Muhammad Ashraf, Muhammad Siddique, Muhammad Salman Mubarik, Luca Bragazza, Alexandre Buttler
A field study was conducted to test the potential of 5-year consecutive application of fresh industrial sludge (FIS) and composted industrial sludge (CIS) to restore soil functions at surface (0-15cm) and subsurface (15-30cm) of the degraded agricultural land. Sludge amendments increased soil fertility parameters including total organic carbon (TOC), soil available nitrogen (SAN), soil available phosphorus (SAP) and soil available potassium (SAK) at 0-15cm depth. Soil enzyme activities i.e. dehydrogenase (DHA), β-glucosidase (BGA) and alkaline phosphatase (ALp) were significantly enhanced by FIS and CIS amendments in surface soil...
November 17, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/29155875/effect-of-long-term-irrigation-patterns-on-phosphorus-forms-and-distribution-in-the-brown-soil-zone
#6
Chang Liu, Xiuli Dang, Melanie A Mayes, Leilei Chen, Yulong Zhang
Continuous application of P fertilizers under different irrigation patterns can change soil phosphorus (P) chemical behavior and increase soil P levels that are of environmental concern. To assess the effect of long-term different irrigation patterns on soil P fractions and availability, this study examined sequential changes in soil organic P and inorganic P from furrow irrigation (FI), surface drip irrigation (SUR), and subsurface drip irrigation (SDI) in the brown soil zone (0-60 cm) during 1998 to 2011...
2017: PloS One
https://www.readbyqxmd.com/read/29154118/effect-of-ph-and-added-slag-on-the-extractability-of-si-in-two-si-deficient-sugarcane-soils
#7
Richard J Haynes, Ya-Feng Zhou
The effects of increasing pH on the adsorption and extractability of Si in two Si-deficient Australian sugarcane soils was investigated and the effects of increasing rates of fertilizer Si (as blast furnace slag) on pH and extractable Si were also examined. Equilibrium studies showed that maximum adsorption of Si by the two soils occurred in the pH range 9-10. When soil pH was increased from 5.0 to 6.5, subsequent adsorption of Si by the two soils, as measured by adsorption isotherms, increased. After incubation with progressive lime additions there was a decline in CaCl2- extractable Si due to its increased adsorption and an increase in acid (H2SO4(-) and acetic acid)-extractable (mainly adsorbed) Si...
November 7, 2017: Chemosphere
https://www.readbyqxmd.com/read/29146988/variations-in-nutrient-and-trace-element-composition-of-rice-in-an-organic-rice-frog-coculture-system
#8
Zhimin Sha, Qingnan Chu, Zheng Zhao, Yubo Yue, Linfang Lu, Jing Yuan, Linkui Cao
Introducing frogs into paddy fields can control pests and diseases, and organic farming can improve soil fertility and rice growth. The aim of this 2-year field study was compare the yield and elemental composition of rice between an organic farming system including frogs (ORF) and a conventional rice culture system (CR). The grain yields were almost the same in the ORF system and the CR system. The ORF significantly increased the contents of phosphorus (P), ion (Fe), zinc (Zn), molybdenum (Mo) and selenium (Se) in rice grain at one or both years...
November 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29146250/revitalization-of-plant-growth-promoting-rhizobacteria-for-sustainable-development-in-agriculture
#9
REVIEW
Sushanto Gouda, Rout George Kerry, Gitishree Das, Spiros Paramithiotis, Han-Seung Shin, Jayanta Kumar Patra
The progression of life in all forms is not only dependent on agricultural and food security but also on the soil characteristics. The dynamic nature of soil is a direct manifestation of soil microbes, bio-mineralization, and synergistic co-evolution with plants. With the increase in world's population the demand for agriculture yield has increased tremendously and thereby leading to large scale production of chemical fertilizers. Since the use of fertilizers and pesticides in the agricultural fields have caused degradation of soil quality and fertility, thus the expansion of agricultural land with fertile soil is near impossible, hence researchers and scientists have sifted their attention for a safer and productive means of agricultural practices...
January 2018: Microbiological Research
https://www.readbyqxmd.com/read/29143258/improvement-of-nitrogen-utilization-and-soil-properties-by-addition-of-a-mineral-soil-conditioner-mechanism-and-performance
#10
Xiaodan Yan, Lin Shi, Rumeng Cai
A mineral soil conditioner (MSC) composed of activated potash feldspar, gypsum, and calcium carbonate and containing an amount of available mineral nutrients, is shown to be effective for plant growth and acidic soil amelioration. In this study, a field test was conducted over four rice seasons by examining treatment with control check (CK), MSC, biological active carbon, and lime to investigate the nitrogen-use efficiency and mechanism of soil characteristic variations due to the desilicification and allitization of soil as well as the unrestrained use of nitrogen (N) fertilizer in recent years...
November 15, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29139075/investigation-of-the-effects-of-slow-release-fertilizer-and-struvite-in-biodegradation-in-filter-drains-and-potential-application-of-treated-water-in-irrigation-of-road-verges
#11
Stephen C Theophilus, Fredrick U Mbanaso, Ernest O Nnadi, Kingsley T Onyedeke
Filter drains are usually laid along the margins of highways. Highway runoffs are polluted with hydrocarbons and high levels of total dissolved solids. Therefore, effective pollution removal mechanism is necessary in order to avoid contamination of surrounding soils and groundwater. Biodegradation is amongst pollution removal mechanisms in filter drains, but it is a relatively slow process which is dependent on wide range of factors including the type of pollutant and availability of nutrients. This paper reports on a study conducted to investigate the impact of slow-release fertilizer and struvite in enhancement of biodegradation of hydrocarbon in filter drains...
November 14, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29137887/effects-of-chlortetracycline-on-the-fate-of-multi-antibiotic-resistance-genes-and-the-microbial-community-during-swine-manure-composting
#12
Zhiqiang Chen, Yao Wang, Qinxue Wen
Excessive use of antibiotics in breeding industry leads to accumulation of antibiotic residuals and antibiotic resistance genes (ARGs) in environment from improperly treated livestock excrements. Four commonly used veterinary antibiotics including chlortetracycline (CTC), sulfamerazine (SMZ), enrofloxacin (ENR) and erythromycin (ERY) were monitored in the swine manure composting. Co-resistance and cross-resistance effects among relative ARGs, correlations between ARGs and bacterial community under multiple antibiotics residual during the composting were investigated in this research...
November 11, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/29133911/species-pool-distributions-along-functional-trade-offs-shape-plant-productivity-diversity-relationships
#13
Loïc Chalmandrier, Camille Albouy, Loïc Pellissier
Grasslands deliver the resources for food production and are among the most biologically diverse ecosystems. These characteristics are often in conflict as increasing yield through fertilization can lead to biodiversity loss. Thus, the challenge in grassland management is to sustain both yield and diversity. Biodiversity-ecosystem functioning experiments typically reveal a positive relationship between manipulated species diversity and productivity. In contrast, observations of the effect of increasing productivity via fertilization suggest a negative association with biodiversity...
November 13, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29132907/determination-of-3-5-dimethylpyrazolium-glyceroborate-nitrification-inhibitor-in-nitrogen-fertilizer-samples-hplc-dad-method-development-and-validation-for-3-5-dimethylpyrazole
#14
Serkan Şahan, Uğur Şahin, Mustafa Başaran, Oğuzhan Uzun, Adem Güneş
3,5 - Dimethylpyrazolium glyceroborate is a nitrification inhibitor (a member of pyrazole derivatives) used for the fixation of nitrogen into the soil. In this study, an HPLC-DAD method was developed and validated for determination of 3,5 - dimethylpyrazole in order to determine 3,5 - dimethylpyrazolium glyceroborate in fertilizer samples. For method development, analytical parameters like type of eluent solution and column filling material and device parameters like eluent flow rate, column oven temperature and measurement wavelength were all optimized...
November 2, 2017: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/29132720/intensify-production-transform-biomass-to-energy-and-novel-goods-and-protect-soils-in-europe-a-vision-how-to-mobilize-marginal-lands
#15
REVIEW
P Schröder, B Beckers, S Daniels, F Gnädinger, E Maestri, N Marmiroli, M Mench, R Millan, M M Obermeier, N Oustriere, T Persson, C Poschenrieder, F Rineau, B Rutkowska, T Schmid, W Szulc, N Witters, A Sæbø
The rapid increase of the world population constantly demands more food production from agricultural soils. This causes conflicts, since at the same time strong interest arises on novel bio-based products from agriculture, and new perspectives for rural landscapes with their valuable ecosystem services. Agriculture is in transition to fulfill these demands. In many countries, conventional farming, influenced by post-war food requirements, has largely been transformed into integrated and sustainable farming...
November 10, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/29131839/diversity-and-feeding-strategies-of-soil-microfauna-along-elevation-gradients-in-himalayan-cold-deserts
#16
Miloslav Devetter, Ladislav Háněl, Klára Řeháková, Jiří Doležal
High-elevation cold deserts in Tibet and Himalaya are one of the most extreme environments. One consequence is that the diversity of macrofauna in this environment is often limited, and soil microorganisms have a more influential role in governing key surface and subsurface bioprocesses. High-elevation soil microfauna represent important components of cold ecosystems and dominant consumers of microbial communities. Still little is known about their diversity and distribution on the edge of their reproductive and metabolic abilities...
2017: PloS One
https://www.readbyqxmd.com/read/29129977/preinoculation-of-soybean-seeds-treated-with-agrichemicals-up-to-30-days-before-sowing-technological-innovation-for-large-scale-agriculture
#17
Ricardo Silva Araujo, Sonia Purin da Cruz, Edson Luiz Souchie, Thomas Newton Martin, André Shigueyoshi Nakatani, Marco Antonio Nogueira, Mariangela Hungria
The cultivation of soybean in Brazil experienced an expressive growth in the last decades. Soybean is highly demanding on nitrogen (N) that must come from fertilizers or from biological fixation. The N supply to the soybean crop in Brazil relies on the inoculation with elite strains of Bradyrhizobium japonicum, B. elkanii, and B. diazoefficiens, which are able to fulfill the crop's N requirements and enrich the soil for the following crop. The effectiveness of the association between N2-fixing bacteria and soybean plants depends on the efficacy of the inoculation process...
2017: International Journal of Microbiology
https://www.readbyqxmd.com/read/29129329/influence-of-nitrogen-and-phosphorus-additions-on-n2-fixation-activity-abundance-and-composition-of-diazotrophic-communities-in-a-chinese-fir-plantation
#18
Qing Wang, Jianlei Wang, Yuanzheng Li, Diwen Chen, Junhua Ao, Wenling Zhou, Dachun Shen, Qiwei Li, Zhenrui Huang, Yong Jiang
Although biological nitrogen (N) fixation (BNF) is an important N input process in subtropical forest ecosystems, how the diazotrophic communities related to this process respond to N and phosphorus (P) inputs is largely unknown. We investigated the effects of exogenous N and/or P inputs on N2-fixation activity, diazotrophic abundance and community composition using a continuous application of fertilizers over 5years experiment in a Chinese fir plantation. The fertilization regimes included control (CK), P treatment (P), low N addition treatment (N1), high N addition treatment (N2), low N and P addition treatment (N1P) and high N with P addition treatment (N2P)...
November 10, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/29128943/effects-of-biochar-on-phytotoxicity-and-translocation-of-polybrominated-diphenyl-ethers-in-ni-fe-bimetallic-nanoparticle-treated-soil
#19
Juan Wu, Yunqiang Yi, Zhanqiang Fang, Eric Pokeung Tsang
In this study, soil culture experiments were conducted to explore the effects of biochar-supported Ni/Fe nanoparticles on the accumulation and translocation of polybrominated diphenyl ethers (PBDEs) in soil-plant system and its phytotoxicity to Brassica chinensis. Compared with those in BDE209 contaminated soils (S 1) and Ni/Fe nanoparticle-treated soil (S 3), the plant biomass, root, and shoot lengths in biochar-supported Ni/Fe nanoparticle-treated soil (S 4) were increased by 23 mg, 1.35 cm, and 2.08 cm and 27...
November 11, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29128773/evaluation-of-potassium-thiosulfate-as-a-nitrification-inhibitor-to-reduce-nitrous-oxide-emissions
#20
Zejiang Cai, Suduan Gao, Minggang Xu, Bradley D Hanson
Potassium thiosulfate (KTS, K2S2O3) has been shown to function as a nitrification inhibitor, thus has the potential to reduce nitrous oxide (N2O) emissions and play an important role in effective N management. The objective of this research was to determine the potential effects of KTS on N2O emissions and N transformation processes in comparison with commercial N transformation inhibitors (stabilizers). A laboratory incubation experiment was conducted using urea and ammonium nitrate (UAN) applied at 150mgNkg(-1) in a Hanford sandy loam soil (coarse-loamy, mixed, superactive, nonacid, thermic Typic Xerorthents)...
November 9, 2017: Science of the Total Environment
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