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https://www.readbyqxmd.com/read/28527035/comparison-of-rhizosphere-properties-as-affected-by-different-bt-and-non-bt-cotton-gossypium-hirsutum-l-genotypes-and-fertilization
#1
Maqshoof Ahamd, Waleed Mumtaz Abbasi, Moazzam Jamil, Muhammad Iqbal, Azhar Hussain, Muhammad Fakhar-U-Zaman Akhtar, Farheen Nazli
Incorporation of genetically modified crops in the cropping system raises the need for studying the effect of these crops on the soil ecosystem. The current study aimed to compare the effect of Bacillus thuringiensis (Bt)- and non-Bt-cotton (Gossypium hirsutum L.) genotypes on rhizosphere properties under fertilized and unfertilized soil conditions. One non-Bt-cotton (IUB 75) and four Bt-cotton varieties (IUB-222, MM-58, IUB-13, FH-142) were sown in a Randomized Complete Block Design (RCBD) in a factorial fashion with three replications under unfertilized (T1) and fertilized (T2 at NPK 310-170-110 kg ha(-1)) soil conditions...
June 2017: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/28525939/green-manure-and-long-term-fertilization-effects-on-soil-zinc-and-cadmium-availability-and-uptake-by-wheat-triticum-aestivum-l-at-different-growth-stages
#2
Roman Grüter, Benjamin Costerousse, Angelina Bertoni, Jochen Mayer, Cécile Thonar, Emmanuel Frossard, Rainer Schulin, Susan Tandy
Zinc (Zn) deficiency in human populations depending on cereals as a main source of Zn is a global malnutrition problem. In this field study, we investigated the potential of green manure application to increase soil Zn availability and wheat grain Zn concentrations (biofortification) on a Luvisol with different long-term fertilizer management. We also studied cadmium (Cd), as wheat is a major contributor of this undesired non-essential element to human diets. Clover (Trifolium alexandrinum L.), mustard (Sinapis alba L...
May 15, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28523618/the-effect-of-sewage-sludge-on-heavy-metal-concentrations-in-wheat-plant-triticum-aestivum-l
#3
Fatemeh Shahbazi, Somayeh Ghasemi, Hamid Sodaiezadeh, Kobra Ayaseh, Rasool Zamani-Ahmadmahmoodi
The use of sewage sludge in agricultural soils can improve soil physical and chemical properties and soil fertility by increasing organic materials; however, the presence of heavy metals in sewage sludge is a significant problem for the quality of agricultural products and the environment. Most heavy metals, due to their inactive nature, are stable and can affect human health. This study investigates the effect of sewage sludge on the concentration of copper, zinc, cadmium, lead, iron, and manganese in two varieties of wheat, i...
May 18, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28522870/the-rice-production-practices-of-high-yield-and-high-nitrogen-use-efficiency-in-jiangsu-china
#4
Jiuxin Guo, Xiangyu Hu, Limin Gao, Kailiu Xie, Ning Ling, Qirong Shen, Shuijin Hu, Shiwei Guo
To face the great challenges of ensuring food security and environmental sustainability, agricultural production must be improved by high yield and high resource utilization efficiency (HYHE). We recently addressed this challenge and evaluated yield potential by surveying 735 farmers in 2008-2012 and then conducting 6 rice field experiments in 2008-2013 with large demonstration areas in 2010-2013 aimed to actualize the HYHE in Jiangsu Province, China. The survey result showed that the averaged N rate, grain yield and N partial factor productivity (PFPN) of the farmers were 336...
May 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28515729/growth-and-yield-responses-of-cowpea-to-inoculation-and-phosphorus-fertilization-in-different-environments
#5
Stephen Kyei-Boahen, Canon E N Savala, David Chikoye, Robert Abaidoo
Cowpea (Vigna unguiculata) is a major source of dietary protein and essential component of the cropping systems in semi-arid regions of Sub-Saharan Africa. However, yields are very low due to lack of improved cultivars, poor management practices, and limited inputs use. The objectives of this study were to assess the effects of rhizobia inoculant and P on nodulation, N accumulation and yield of two cowpea cultivars in Mozambique. Field study was conducted in three contrasting environments during the 2013/2014 and 2014/2015 seasons using randomized complete block design with four replications and four treatments...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28513916/global-forest-carbon-uptake-due-to-nitrogen-and-phosphorus-deposition-from-1850-to-2100
#6
Rong Wang, Daniel Goll, Yves Balkanski, Didier Hauglustaine, Olivier Boucher, Philippe Ciais, Ivan Janssens, Josep Penuelas, Bertrand Guenet, Jordi Sardans, Laurent Bopp, Nicolas Vuichard, Feng Zhou, Bengang Li, Shilong Piao, Shushi Peng, Ye Huang, Shu Tao
Spatial patterns and temporal trend of nitrogen (N) and phosphorus (P) deposition are important for quantifying their impact on forest carbon (C) uptake. In a first step, we modeled historical and future change in the global distributions of the atmospheric deposition of N and P from the dry and wet deposition of aerosols and gases containing N and P. Future projections were compared between two scenarios with contrasting aerosol emissions. Modeled fields of N and P deposition and P concentration were evaluated using globally distributed in situ measurements...
May 17, 2017: Global Change Biology
https://www.readbyqxmd.com/read/28511361/predicting-phosphorus-availability-from-chemically-diverse-conventional-and-recycling-fertilizers
#7
O Duboc, J Santner, A Golestani Fard, F Zehetner, J Tacconi, W W Wenzel
Fertilizers produced from heterogeneous, phosphorus-rich biowastes are becoming increasingly relevant. Treatment and processing (combustion, pyrolysis, anaerobic digestion, etc.) increase the diversity of their physico-chemical composition even further. We investigated several approaches to characterize P availability from a set of 13 contrasting fertilizers. We tested them directly using standard fertilizer extractions, as well as a continuous, sink-based P extraction (iron bag) method. We also performed Olsen, CAL and diffusive gradients in thin films (DGT) tests on fertilized soil...
May 12, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28511358/the-degree-of-phosphorus-saturation-of-agricultural-soils-in-germany-current-and-future-risk-of-diffuse-p-loss-and-implications-for-soil-p-management-in-europe
#8
P Fischer, R Pöthig, M Venohr
Decades of intensive agricultural production with excessive application of P fertilizer have resulted in the accumulation of P in soils, threatening water bodies in most industrialized countries with eutrophication. In our study, we elucidated the risk of P loss of German agricultural soils by transforming provided monitoring data of plant-available P determined by the calcium-acetate-lactate (PCAL) and double-lactate method (PDL) into the degree of phosphorus saturation (DPS). As water-soluble phosphorus (WSP) is correlated to DPS, we derived a pedotransfer function (PTF) between PCAL and WSP for different soil types...
May 12, 2017: Science of the Total Environment
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
#9
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/28511136/fate-of-pharmaceuticals-in-soil-after-application-of-stps-products-influence-of-physicochemical-properties-and-modelling-approach
#10
Xela García-Santiago, Juan M Garrido, Juan M Lema, Amaya Franco-Uría
Depurated effluents can be employed as reclaimed water for irrigation in regions with low precipitations, while nutrients-rich biosolids are usually applied as fertilizer for agricultural purposes. However, both practices may result in the accumulation of micropollutants in the soil compartment, the contamination of groundwater, and/or their biotransfer to different living organisms until they finally may reach human receptors. The fate and transport of seven pharmaceutical and personal care products (PPCPs) with different physicochemical properties was analysed for these scenarios employing two different models: the buckets model and the HYDRUS-1D software package...
May 11, 2017: Chemosphere
https://www.readbyqxmd.com/read/28507306/long-term-increases-in-soil-carbon-due-to-ecosystem-fertilization-by-atmospheric-nitrogen-deposition-demonstrated-by-regional-scale-modelling-and-observations
#11
E Tipping, J A C Davies, P A Henrys, G J D Kirk, A Lilly, U Dragosits, E J Carnell, A J Dore, M A Sutton, S J Tomlinson
Fertilization of nitrogen (N)-limited ecosystems by anthropogenic atmospheric nitrogen deposition (Ndep) may promote CO2 removal from the atmosphere, thereby buffering human effects on global radiative forcing. We used the biogeochemical ecosystem model N14CP, which considers interactions among C (carbon), N and P (phosphorus), driven by a new reconstruction of historical Ndep, to assess the responses of soil organic carbon (SOC) stocks in British semi-natural landscapes to anthropogenic change. We calculate that increased net primary production due to Ndep has enhanced detrital inputs of C to soils, causing an average increase of 1...
May 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28505879/nitrogen-utilization-and-environmental-losses-in-organic-greenhouse-lettuce-amended-with-two-distinct-biochars
#12
Engil Isadora Pujol Pereira, Rafaela Feola Conz, Johan Six
The potential of biochar to prevent nitrogen (N) losses and improve plant performance were studied across various levels of N input for two growing seasons in mesocosms simulating an organic lettuce production system. A silt loam soil was amended with pine chip (PC) and walnut shell (WS) biochar (10tha(-1)) in combination with five organic N fertilization rates (0, 56, 112, 168, and 225kgNha(-1)). The N output through harvest, leachate, and N2O emissions were measured to assess N utilization and environmental losses of biochar-amended soils...
May 10, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28503807/reducing-anti-nutritional-factor-and-enhancing-yield-with-advancing-time-of-planting-and-zinc-application-in-grasspea-in-ethiopia
#13
Ashutosh Sarker, Asnake Fikre, Ali M Abd El-Moneim, Hani Nakkoul, Murari Singh
BACKGROUND: Grasspea (Lathyrus sativus L.), an important pulse crop in food, feed and for sustainable crop production systems in Ethiopia. Despite its advantage on nutrition and adaptability to harsh climate and low fertile soil, it contains a neurotoxin β - N - Oxalyl α β diamiono propionic acid (β-ODAP) which paralyzes the lower limbs and is affected by genotypic and agronomic factors. The effect of zinc application and planting date on yield and β- ODAP content of two genotypes, experiments were conducted in two regions of Ethiopia...
May 15, 2017: Journal of the Science of Food and Agriculture
https://www.readbyqxmd.com/read/28502714/why-is-it-so-difficult-to-determine-the-yield-of-indoor-cannabis-plantations-a-case-study-from-the-netherlands
#14
Wouter Vanhove, Nicole Maalsté, Patrick Van Damme
Together, the Netherlands and Belgium are the largest indoor cannabis producing countries in Europe. In both countries, legal prosecution procedure of convicted illicit cannabis growers usually includes recovery of the profits gained. However, it is not easy to make a reliable estimation of the latter profits, due to the wide range of factors that determine indoor cannabis yields and eventual selling prices. In the Netherlands, since 2005, a reference model is used that assumes a constant yield (g) per plant for a given indoor cannabis plant density...
March 31, 2017: Forensic Science International
https://www.readbyqxmd.com/read/28502048/the-effects-of-cadmium-pulse-dosing-on-physiological-traits-and-growth-of-the-submerged-macrophyte-vallisneria-spinulosa-and-phytoplankton-biomass-a-mesocosm-study
#15
Hui Liu, Yu Cao, Wei Li, Zhao Zhang, Erik Jeppesen, Wei Wang
Pulse inputs of heavy metals are expected to increase with a higher frequency of extreme climate events (heavy rain), leading to stronger erosion of contaminated and fertilized farmland soils to freshwaters, with potentially adverse effects on lake ecosystems. We conducted a 5-month mesocosm study to elucidate the responses of the submerged macrophyte Vallisneria spinulosa and phytoplankton to four different doses of cadmium (Cd): 0 (control), 0.05, 0.5, and 5 g m(-2) (CK, I, II, and III, respectively) under mesotrophic conditions...
May 13, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28501399/effect-of-feeding-strategies-and-cropping-systems-on-greenhouse-gas-emission-from-wisconsin-certified-organic-dairy-farms
#16
D Liang, F Sun, M A Wattiaux, V E Cabrera, J L Hedtcke, E M Silva
Organic agriculture continues to expand in the United States, both in total hectares and market share. However, management practices used by dairy organic producers, and their resulting environmental impacts, vary across farms. This study used a partial life cycle assessment approach to estimate the effect of different feeding strategies and associated crop production on greenhouse gas emissions (GHG) from Wisconsin certified organic dairy farms. Field and livestock-driven emissions were calculated using 2 data sets...
May 10, 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/28500769/biogeochemistry-drives-diversity-in-the-prokaryotes-fungi-and-invertebrates-of-a-panama-forest
#17
Michael Kaspari, Jelena Bujan, Michael D Weiser, Daliang Ning, Sean T Michaletz, He Zhili, Brian J Enquist, Robert B Waide, Jizhong Zhou, Benjamin L Turner, S Joseph Wright
Humans are both fertilizing the world and depleting its soils, decreasing the diversity of aquatic ecosystems and terrestrial plants in the process. We know less about how nutrients shape the abundance and diversity of the prokaryotes, fungi, and invertebrates of Earth's soils. Here we explore this question in the soils of a Panama forest subject to a 13-year fertilization with factorial combinations of nitrogen (N), phosphorus (P), and potassium (K) and a separate micronutrient cocktail. We contrast three hypotheses linking biogeochemistry to abundance and diversity...
May 13, 2017: Ecology
https://www.readbyqxmd.com/read/28500764/phylogeny-is-a-powerful-tool-for-predicting-plant-biomass-responses-to-nitrogen-enrichment
#18
Rachel C Wooliver, Zachary H Marion, Christopher R Peterson, Brad M Potts, John K Senior, Joseph K Bailey, Jennifer A Schweitzer
Increasing rates of anthropogenic nitrogen (N) enrichment to soils often lead to the dominance of nitrophilic plant species and reduce plant diversity in natural ecosystems. Yet, we lack a framework to predict which species will be winners or losers in soil N enrichment scenarios, a framework that current literature suggests should integrate plant phylogeny, functional trade-offs, and nutrient co-limitation. Using a controlled fertilization experiment, we quantified biomass responses to N enrichment for 23 forest tree species within the genus Eucalyptus that are native to Tasmania, Australia...
May 13, 2017: Ecology
https://www.readbyqxmd.com/read/28500551/effect-of-industrial-and-domestic-ash-from-biomass-combustion-and-spent-coffee-grounds-on-soil-fertility-and-plant-growth-experiments-at-field-conditions
#19
João Peres Ribeiro, Estela Domingos Vicente, Ana Paula Gomes, Maria Isabel Nunes, Célia Alves, Luís A C Tarelho
An experimental study was conducted at field conditions in order to evaluate the effect of application of ash from biomass combustion on some soil fertility characteristics and plant growth. Application of 7.5 Mg ha(-1) industrial fly ash (IA), domestic ash (DA), and a 50:50 mix of domestic ash (DA) and spent coffee grounds (SCG) was made in different soil parcels. Lolium perenne seeds were sown and the grown biomass was harvested and quantified after 60 days. Soil samples from each parcel were also collected after that period and characterized...
May 13, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28500550/reclamation-of-heavy-metals-from-contaminated-soil-using-organic-acid-liquid-generated-from-food-waste-removal-of-cd-cu-and-zn-and-soil-fertility-improvement
#20
Shijin Dai, Yang Li, Tao Zhou, Youcai Zhao
Food waste fermentation generates complicated organic and acidic liquids with low pH. In this work, it was found that an organic acid liquid with pH 3.28 and volatile low-molecular-weight organic acid (VLMWOA) content of 5.2 g/L could be produced from food wastes after 9-day fermentation. When the liquid-to-solid ratio was 50:1, temperature was 40 °C, and contact time was 0.5-1 day, 92.9, 78.8, and 52.2% of the Cd, Cu, and Zn in the contaminated soil could be washed out using the fermented food waste liquid, respectively...
May 13, 2017: Environmental Science and Pollution Research International
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