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https://www.readbyqxmd.com/read/29785596/biochar-reduces-nitrate-level-in-red-beet
#1
Josef Maroušek, Ladislav Kolář, Marek Vochozka, Vojtěch Stehel, Anna Maroušková
Impacts of red beet consumption both on human and animal health are subject of intense research. In particular, products that are not heat-processed contain plethora of bioactive compounds that hold promise against numerous degenerative and aging-associated diseases. However, high level of nitrates (typically more than 2 g NO3 - kg-1 ) whose health effects are perceived with reasoned objections counterbalance these benefits. Following the above, from a certain level, the increased consumption of red beet has contrary impacts, creating a limiting factor not only from the economic point of view but also in terms of beneficial compounds intake...
May 21, 2018: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29782687/production-via-n-fertilization-and-correction-by-liming-of-acidity-in-soils-contribute-a-huge-efflux-of-co-2-to-atmosphere-real-or-arbitrary
#2
Ashim Datta, Biswapati Mandal
In a recent article, Zamanian et al. (2018) made an interesting assessment for CO2 efflux to atmosphere from inorganic carbon in soils on N-fertilization induced acidity (7.48 × 1012 g CO2 C/year) and also from liming of acid soils (273 × 1012 g CO2 C/year) using global database of soil CaCO3 stock, acid soil coverage, N-fertilizer use and associated quantity of protons produced etc. We have the following few non-convergent points of views on the issues.Firstly, stoichiometry of protonation (H+ ) in soils out of N-fertilization through urea, and other sources is known and the resultant annual changes in soil pH are also reported by many, including those who used long-term experiments (Stewart et al...
May 21, 2018: Global Change Biology
https://www.readbyqxmd.com/read/29782162/water-and-fertilizer-integrated-hydrogel-derived-from-the-polymerization-of-acrylic-acid-and-urea-as-a-slow-release-n-fertilizer-and-water-retention-in-agriculture
#3
Dongdong Cheng, Yan Liu, Guiting Yang, Aiping Zhang
To reduce the preparation cost of superabsorbent and improve the N release rate at the same time, a novel low cost superabsorbent (SA) with the function of N slow release was prepared by chemical synthesis with neutralized acrylic acid (AA), urea, potassium persulfate (KPS) and N,N'-methylenebisacrylamide (MBA). The influence order of influence factors on water absorbency property was determined by orthogonal L18(3)7 experiment. Based on the optimization results of orthogonal experiment, the effects of single factor on the water absorption were studied, and the highest water absorbency (909 g/g) was obtained on the conditions: 1...
May 21, 2018: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/29780402/dark-septate-endophytic-fungi-increase-green-manure-15-n-recovery-efficiency-n-contents-and-micronutrients-in-rice-grains
#4
Carlos Vergara, Karla E C Araujo, Segundo Urquiaga, Claudete Santa-Catarina, Nivaldo Schultz, Ednaldo da Silva Araújo, Fabiano de Carvalho Balieiro, Gustavo R Xavier, Jerri É Zilli
An understanding of the interaction between rice and dark septate endophytic (DSE) fungi, under green fertilization, may lead to sustainable agricultural practices. Nevertheless, this interaction is still poorly understood. Therefore, in this study, we aimed to evaluate the accumulation of macro- and micronutrients, dry matter, and protein and N recovery efficiency from Canavalia ensiformis (L.)-15 N in rice inoculated with DSE fungi. An experiment under greenhouse conditions was conducted in a randomized complete block design comprising split-plots, with five replicates of rice plants potted in non-sterilized soil...
2018: Frontiers in Plant Science
https://www.readbyqxmd.com/read/29778955/controlled-release-urea-reduced-nitrogen-leaching-and-improved-nitrogen-use-efficiency-and-yield-of-direct-seeded-rice
#5
Shugang Zhang, Tianlin Shen, Yuechao Yang, Yuncong C Li, Yongshan Wan, Min Zhang, Yafu Tang, Samuel C Allen
The use of controlled-release urea (CRU) has become one of best management practices for increasing crop yield and improving nitrogen (N) use efficiency (NUE). However, the effects of CRU on direct-seeded rice are not well understood while direct-seeding has gradually replaced transplanting due to increasing labor cost and lack of irrigation water. The objective of this two-year field experiment was to compare the effects of the CRU at four rates (120, 180, 240 and 360 kg N ha-1 , CRU1, CRU2, CRU3 and CRU4, respectively) with a conventional urea fertilizer (360 kg N ha-1 ; U) and a control (no N fertilizer applied; CK) on yield, biomass, NUE of direct-seeded rice and soil nutrients...
May 17, 2018: Journal of Environmental Management
https://www.readbyqxmd.com/read/29778168/development-of-a-novel-myconanomining-approach-for-the-recovery-of-agriculturally-important-elements-from-jarosite-waste
#6
Ankita Bedi, Braj Raj Singh, Sunil K Deshmukh, Nisha Aggarwal, Colin J Barrow, Alok Adholeya
In this study, an ecofriendly and economically viable waste management approach have been attempted towards the biosynthesis of agriculturally important nanoparticles from jarosite waste. Aspergillus terreus strain J4 isolated from jarosite (waste from Debari Zinc Smelter, Udaipur, India), showed good leaching efficiency along with nanoparticles (NPs) formation under ambient conditions. Fourier-transform infrared spectroscopy (FT-IR) and transmission electron microscopy (TEM) confirmed the formation of NPs...
May 2018: Journal of Environmental Sciences (China)
https://www.readbyqxmd.com/read/29775942/toxicological-effects-on-earthworms-eisenia-fetida-exposed-to-sub-lethal-concentrations-of-bde-47-and-bde-209-from-a-metabolic-point
#7
Ruoyu Liang, Juan Chen, Yajuan Shi, Yonglong Lu, Suriyanarayanan Sarvajayakesavalu, Xiangbo Xu, Xiaoqi Zheng, Kifayatullah Khan, Chao Su
Earthworms improve the soil fertility and they are also sensitive to soil contaminants. Earthworms (Eisenia fetida), standard reference species, were usually chosen to culture and handle for toxicity tests. Metabolic responses in earthworms exposed to 2, 2', 4, 4'-tetrabromodiphenyl ether (BDE-47) and decabromodiphenyl ether (BDE-209) were inhibitory and interfered with basal metabolism. In this study, 1 H-NMR based metabolomics was used to identify sensitive biomarkers and explore metabolic responses of earthworms under sub-lethal BDE-47 and BDE-209 concentrations for 14 days...
May 15, 2018: Environmental Pollution
https://www.readbyqxmd.com/read/29775821/vermiremediation-of-metal-loid-s-via-eichornia-crassipes-phytomass-extraction-a-sustainable-technique-for-plant-amelioration
#8
Arnab Majumdar, Anil Barla, Munish Kumar Upadhyay, Dibyarpita Ghosh, Punarbasu Chaudhuri, Sudhakar Srivastava, Sutapa Bose
Eichhornia crassipes (water hyacinth), imparts deficiency of soluble arsenic and other toxic metal (loid)s through rhizofiltration and phytoaccumulation. Without proper management strategy, this phytoremediation of metal (loid)s might fail and get reverted back to the environment, contaminating the nearby water bodies. This study, focused on bio-conversion of phytoremediating hyacinths, spiked with 100 times and greater arsenic, lead and cadmium concentrations than the average water contamination, ranging in 58...
May 15, 2018: Journal of Environmental Management
https://www.readbyqxmd.com/read/29763872/effect-of-compost-application-on-the-dynamics-of-carbon-in-a-nectarine-orchard-ecosystem
#9
E Baldi, L Cavani, A Margon, M Quartieri, G Sorrenti, C Marzadori, M Toselli
The aim of the present study was to compare the quantity and the type of carbon (C) stored during the 14-year lifetime of a commercial nectarine orchard ecosystem fertilized with mineral or organic fertilizers. The study was carried out in the Po valley, Italy, in a nectarine orchard of the variety Stark RedGold, grafted on GF677 hybrid peach × almond. Since orchard planting in August 2001, the following treatments were applied in a randomized complete block design with four replicates per block and compared: 1...
May 12, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/29760689/-trichoderma-biofertilizer-links-to-altered-soil-chemistry-altered-microbial-communities-and-improved-grassland-biomass
#10
Fengge Zhang, Yunqian Huo, Adam B Cobb, Gongwen Luo, Jiqiong Zhou, Gaowen Yang, Gail W T Wilson, Yingjun Zhang
In grasslands, forage and livestock production results in soil nutrient deficits as grasslands typically receive no nutrient inputs, leading to a loss of grassland biomass. The application of mature compost has been shown to effectively increase grassland nutrient availability. However, research on fertilization regime influence and potential microbial ecological regulation mechanisms are rarely conducted in grassland soil. We conducted a two-year experiment in meadow steppe grasslands, focusing on above- and belowground consequences of organic or Trichoderma biofertilizer applications and potential soil microbial ecological mechanisms underlying soil chemistry and microbial community responses...
2018: Frontiers in Microbiology
https://www.readbyqxmd.com/read/29758911/a-hybrid-land-water-environment-model-for-identification-of-ecological-effect-and-risk-under-uncertain-meteorological-precipitation-in-an-agroforestry-ecosystem
#11
Xueting Zeng, Tienan Li, Cong Chen, Zhenjiang Si, Guohe Huang, Ping Guo, Xiaowen Zhuang
In this study, a hybrid land-water-environment (LWE) model is developed for identifying ecological effect and risk under uncertain precipitation in an agroforestry ecosystem. A simulation-based fuzzy-stochastic programming with risk analysis (SFSR) method is used into LWE model to reflect the meteorological impacts; meanwhile, it also can quantify artificial fuzziness (e.g., risk attitude of policymaker) and natural vagueness (e.g., ecological function) in decision-making. The developed LWE model with SFSR method is applied to a practical agroforestry ecosystem in China...
August 15, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/29758436/n-2-o-and-co-2-emissions-following-repeated-application-of-organic-and-mineral-n-fertiliser-from-a-vegetable-crop-rotation
#12
Daniele De Rosa, David W Rowlings, Johannes Biala, Clemens Scheer, Bruno Basso, Peter R Grace
Accounting for nitrogen (N) release from organic amendments (OA) can reduce the use of synthetic N-fertiliser, sustain crop production, and potentially reduce soil borne greenhouse gases (GHG) emissions. However, it is difficult to assess the GHG mitigation potential for OA as a substitute of N-fertiliser over the long term due to only part of the organic N added to soil is being released in the first year after application. High-resolution nitrous oxide (N2 O) and carbon dioxide (CO2 ) emissions monitored from a horticultural crop rotation over 2...
May 11, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/29758430/the-extent-and-pathways-of-nitrogen-loss-in-turfgrass-systems-age-impacts
#13
Huaihai Chen, Tianyou Yang, Qing Xia, Daniel Bowman, David Williams, John T Walker, Wei Shi
Nitrogen loss from fertilized turf has been a concern for decades, with most research focused on inorganic (NO3 - ) leaching. The present work examined both inorganic and organic N species in leachate and soil N2 O emissions from intact soil cores of a bermudagrass chronosequence (1, 15, 20, and 109 years old) collected in both winter and summer. Measurements of soil N2 O emissions were made daily for 3 weeks, while leachate was sampled once a week. Four treatments were established to examine the impacts of fertilization and temperature: no N, low N at 30 kg N ha-1 , and high N at 60 kg N ha-1 , plus a combination of high N and temperature (13 °C in winter or 33 °C in summer compared to the standard 23 °C)...
May 11, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/29755421/fungal-biodiversity-and-their-role-in-soil-health
#14
REVIEW
Magdalena Frąc, Silja E Hannula, Marta Bełka, Małgorzata Jędryczka
Soil health, and the closely related terms of soil quality and fertility, is considered as one of the most important characteristics of soil ecosystems. The integrated approach to soil health assumes that soil is a living system and soil health results from the interaction between different processes and properties, with a strong effect on the activity of soil microbiota. All soils can be described using physical, chemical, and biological properties, but adaptation to environmental changes, driven by the processes of natural selection, are unique to the latter one...
2018: Frontiers in Microbiology
https://www.readbyqxmd.com/read/29754301/immobilization-of-soil-cadmium-using-combined-amendments-of-illite-smectite-clay-with-bone-chars
#15
Hong Li, Jieyong Ou, Xuedong Wang, Zengguang Yan, Youya Zhou
The widespread use of cadmium (Cd)-containing organic fertilizers is a source of heavy metal inputs to agricultural soils in suburban areas. Therefore, the research and development of new materials and technologies for the remediation of Cd-contaminated soil is of great significance and has the potential to guarantee the safety of agricultural products and the protection of human health. We performed pot experiments to determine the potential of combined amendments of illite/smectite (I/S) clay with bone chars for the remediation of Cd-contaminated agricultural soils in a suburban area of Beijing, China...
May 12, 2018: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29754291/defence-strategies-in-african-savanna-trees
#16
Benjamin J Wigley, Hervé Fritz, Corli Coetsee
Southern African savannas are commonly polarised into two broad types based on plant functional types and defences; infertile savannas dominated by broad-leaved trees typically defended by nitrogen-free secondary compounds and fertile savannas dominated by fine-leaved trees defended by structural defences. In this study, we use trait and other data from 15 wooded savanna sites in Southern Africa and ask if broad-leaved and fine-leaved species dominate on nutrient-poor and nutrient-rich soils, respectively. We then test if there is there any evidence for trade-offs in chemical (i...
May 12, 2018: Oecologia
https://www.readbyqxmd.com/read/29754058/plant-and-soil-responses-to-hydrothermally-converted-sewage-sludge-sewchar
#17
Tatiane Medeiros Melo, Michael Bottlinger, Elke Schulz, Wilson Mozena Leandro, Adelmo Menezes de Aguiar Filho, Hailong Wang, Yong Sik Ok, Jörg Rinklebe
This study compared the effects of sewchar and mineral fertilizer on plant responses in beans (Phaseolus vulgaris, var. "Jalo precoce") and soil properties in a pot experiment in a completely randomized design with two harvests. The initial treatments consisted of a control, sewchar doses of 4, 8, 16 and 32 Mg ha-1 and mineral fertilizer (30 mg N, 90 mg P2 O5 and 60 mg K2 O kg-1 ). The treatments (4 replications each) were fertilized with 135 mg P2 O5  kg-1 at the second harvest. The sewchar application rates correlated positively with the CEC, the water holding capacity, the availability of Zn, Ca, Fe, Cu, and P, and the concentrations of nitrate, ammonium, total N, total organic carbon and hot water extractable carbon...
May 2, 2018: Chemosphere
https://www.readbyqxmd.com/read/29753245/effects-of-long-term-pig-manure-application-on-antibiotics-abundance-of-antibiotic-resistance-genes-args-anammox-and-denitrification-rates-in-paddy-soils
#18
M Mizanur Rahman, Jun Shan, Pinpin Yang, Xiaoxia Shang, Yongqiu Xia, Xiaoyuan Yan
Previous studies of long-term manure applications in paddy soil mostly focused on the effects on denitrification, occurrence of antibiotics and antibiotic resistance genes (ARGs) without considering the effects on anaerobic ammonium oxidation (anammox). Here, we investigated the potential rates of anammox and denitrification, occurrence of antibiotics and AGRs in response to three fertilization regimes (C, no fertilizer; N, mineral fertilizer; and NM, N plus pig manure) in six long-term paddy experiment sites across China...
May 9, 2018: Environmental Pollution
https://www.readbyqxmd.com/read/29752642/can-short-term-pasture-management-increase-c-balance-in-the-atlantic-rainforest
#19
Paulo Roberto da Rocha Junior, Felipe Vaz Andrade, Lucas Santos Satiro, Guilherme Kangussú Donagemma, Eduardo de Sá Mendonça
Few studies have shown the importance of different pasture management practices on C storage and the reduction of CO2 -C emissions in tropical conditions. The objective of the present study was to determine short-term changes in C pools and C balance from different pasture management practices established in the Atlantic Rainforest. A field study was carried out in Alegre, ES, Brazil from September 2013 to August 2014 to investigate the first-year effect of pasture management practices on a Udult clayey soil...
May 11, 2018: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/29751696/-research-of-pollution-free-and-precision-cultivation-system-of-chinese-herbal-medicines
#20
Shi-Lin Chen, Lin-Lin Dong, Qiao-Sheng Guo, Jian-He Wei, Xi-Wen Li, Gang Li, Qi Li, Yu-de Liu, Si-Jing Liu, Hong Xu, Yu-Qi Yu, Jie Wu, Chong-Heng Liang
The issues of disordering production and non-standard pesticide application are common in the production of Chinese herbal medicines. Aimed to above problems, research groups built the pollution-free and precision cultivation system of medicinal plants. This system mainly included the precise site selection of medicinal plants based on the GIS technology, modern omics-assisted breeding, metagenomics guiding the soil complex improvement, and the precise field management based on rational application of fertilizer and comprehensive control of disease...
April 2018: Zhongguo Zhong Yao za Zhi, Zhongguo Zhongyao Zazhi, China Journal of Chinese Materia Medica
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