Read by QxMD icon Read


Niels West, Martin Nue Møller, Søren Hansen, Per Cayé-Thomasen
OBJECTIVES: The aim of the present study was to investigate the relationships between tumor size, hearing, and vestibular outcomes in patients with vestibular schwannomas (VSs). MATERIALS AND METHODS: Adult patients (n=124) with unilateral extrameatal VS prior to surgery were included in the study. This was a retrospective cohort study of preoperative audiovestibular investigations including audiometry, discrimination test, caloric test, cervical vestibular evoked myogenic potential (c-VEMP), and ocular vestibular evoked myogenic potential (o-VEMP)...
August 3, 2018: Journal of International Advanced Otology
A S Nehe, S Misra, E H Murchie, K Chinnathambi, M J Foulkes
Nitrogen (N) fertilizer represents a significant cost for the grower and may also have environmental impacts through nitrate leaching and N2 O (a greenhouse gas) emissions associated with denitrification. The objectives of this study were to quantify the genetic variability in N-use efficiency (NUE) in Indian spring wheat cultivars and identify traits for improved NUE for application in breeding. Twenty eight bread wheat cultivars and two durum wheat cultivars were tested in field experiments in two years in Maharashtra, India...
August 1, 2018: Field Crops Research
Li Wang, Cheng Xue, Xia Pan, Fang Chen, Yi Liu
The use of controlled-release urea (CRU) has been recommended over that of conventional urea to improve rice grain yield and nitrogen use efficiency. However, the underlying agronomical and physiological mechanisms need to be better understood. In this study, field trials over four site-years, and a big container experiment were carried out to explore CRU effects on rice yield and NUE, with the main aims to identify the key yield components contributing to the superior rice yield with CRU use, and to evaluate differences in dry matter, nitrogen (N) accumulation, translocation and yield formation with different N fertilizer practices...
2018: Frontiers in Plant Science
Qianjing Jiang, Zhiming Qi, Chandra A Madramootoo, Cynthia Crézé
Greenhouse gas (GHG) emissions from agricultural soils are affected by various environmental factors and agronomic practices. The impact of inorganic nitrogen (N) fertilization rates and timing, and water table management practices on N2 O and CO2 emissions were investigated to propose mitigation and adaptation efforts based on simulated results founded on field data. Drawing on 2012-2015 data measured on a subsurface-drained corn (Zea mays L.) field in Southern Quebec, the Root Zone Water Quality Model 2 (RZWQM2) was calibrated and validated for the estimation of N2 O and CO2 emissions under free drainage (FD) and controlled drainage with sub-irrigation (CD-SI)...
July 21, 2018: Science of the Total Environment
Chaoqiang Jiang, Dianjun Lu, Chaolong Zu, Jia Shen, Shiji Wang, Zhibin Guo, Jianmin Zhou, Huoyan Wang
Excess N-fertilizer application and inappropriate fertilization methods have led to low N use efficiency (NUE) and high N leaching. A field experiment was performed in a typical lime concretion black soil area to compare N application methods: split surface broadcasting (SSB) and one-time root-zone fertilization (RZF) on grain yield, NUE, the fate of 15 N urea and soil N loss during the 2015 and 2016 maize growing seasons. Each application method was tested at N rates of 135 and 180 kg N ha-1 , and a control (CK) with no N fertilizer...
July 6, 2018: Scientific Reports
Ying-Peng Hua, Ting Zhou, Qiong Liao, Hai-Xing Song, Chun-Yun Guan, Zhen-Hua Zhang
Nitrogen (N) is a non-mineral macronutrient essential for plant growth and development. Oilseed rape (An An Cn Cn , 2 n =4 x =38) has a high requirement for N nutrients whereas showing the lowest N use efficiency (NUE) among crops. The mechanisms underlying NUE regulation in Brassica napus remain unclear because of genome complexity. In this study, we performed high-depth and -coverage whole-genome re-sequencing (WGS) of an N-efficient (higher NUE) genotype "XY15" and an N-inefficient (lower NUE) genotype "814" of rapeseed...
July 2, 2018: G3: Genes—Genomes—Genetics
Yanzheng Wu, Yong Li, Xiaoqing Fu, Jianlin Shen, Dan Chen, Yi Wang, Xinliang Liu, Runlin Xiao, Wenxue Wei, Jinshui Wu
Tea (Camellia sinensis L.), a perennial leaf-harvested crop, favors warm/humid climate and acidic/well-drained soils, and demands high nitrogen (N) fertilizer inputs which lead to significant emissions of N2 O. Potential mitigation options should be adopted to improve N use efficiency (NUE) and reduce environmental pollution in tea field system. A 3-year field experiment was carried out in a tea field in southern China from January 2014 to December 2016 to investigate the effect of controlled-release fertilizer (CRF) application on N2 O emissions in tea field system...
June 29, 2018: Environmental Science and Pollution Research International
Lívia Gomes Torres, Mateus Cupertino Rodrigues, Nathan Lamounier Lima, Tatiane Freitas Horta Trindade, Fabyano Fonseca E Silva, Camila Ferreira Azevedo, Rodrigo Oliveira DeLima
Identifying maize inbred lines that are more efficient in nitrogen (N) use is an important strategy and a necessity in the context of environmental and economic impacts attributed to the excessive N fertilization. N-uptake efficiency (NUpE) and N-utilization efficiency (NUtE) are components of N-use efficiency (NUE). Despite the most maize breeding data have a multi-trait structure, they are often analyzed under a single-trait framework. We aimed to estimate the genetic parameters for NUpE and NUtE in contrasting N levels, in order to identify superior maize inbred lines, and to propose a Bayesian multi-trait multi-environment (MTME) model...
2018: PloS One
Alemayehu Kidane, Margareth Øverland, Liv Torunn Mydland, Egil Prestløkken
We assessed the interactive effects of gross feed use efficiency (FUE, milk yield per kg DMI) background ("high" = HEFF vs. "low" = LEFF) and graded levels of dietary CP (130, 145, 160 and 175 g/kg DM) on milk production, enteric methane (CH4) emission and apparent nitrogen use efficiency (NUE, g milk protein nitrogen per g nitrogen intake) with Nowegian Red (NRF) dairy cows. Eight early- to mid-lactation cows were used in a 4x4 Latin square design experiment (2 efficiency backgrounds, 4 dietary treatments and 4 periods each lasting 28 d)...
June 26, 2018: Journal of Animal Science
Jinpeng Li, Xuexin Xu, Gang Lin, Yunqi Wang, Yang Liu, Meng Zhang, Jinyao Zhou, Zhimin Wang, Yinghua Zhang
Water use efficiency (WUE) and nitrogen fertilizer use efficiency (NUE) of winter wheat are urgently needed to further improve in the North China Plain (NCP). In this study, a 3-year field experiment was conducted during the 2014-2017 growing seasons to clarify the effect of traditional flood irrigation (TI), surface drip irrigation (DI), and micro-sprinkling irrigation (MSI) on grain yield, WUE, and NUE of winter wheat. Across the 3 years, grain yield of DI and MSI improved by 9.79% and 14.1%, WUE of DI and MSI increased by 12...
June 22, 2018: Science of the Total Environment
I Subhakara Rao, C N Neeraja, B Srikanth, D Subrahmanyam, K N Swamy, K Rajesh, P Vijayalakshmi, T Vishnu Kiran, N Sailaja, P Revathi, P Raghuveer Rao, L V Subba Rao, K Surekha, V Ravindra Babu, S R Voleti
With the priority of the low input sustainable rice cultivation for environment friendly agriculture, NUE of rice becomes the need of the hour. A set of 472 rice genotypes comprising landraces and breeding lines were evaluated for two seasons under field conditions with low and recommended nitrogen and >100 landraces were identified with relative higher yield under low nitrogen. Donors were identified for higher N uptake, N translocation into grains and grain yield under low N. Grains on secondary branches, N content in grain and yield appears to be the selection criterion under low N...
June 15, 2018: Scientific Reports
Dennis P Swaney, Robert W Howarth, Bongghi Hong
[The data presented here represent estimates of the nitrogen content of crop production, nitrogen use efficiency (NUE) and agricultural nitrogen inputs associated with it across the contiguous United States. Net Anthropogenic Nitrogen Input (NANI) estimates and related data are also provided. Data are presented at county, sub-regional and regional scales. Here, subregions refer to multi-county areas delineated with the goal of obtaining more uniform reporting areas than individual counties. Regions refer to the USDA Farm Resource Regions...
June 2018: Data in Brief
Anuj Kumar, Mansi Sharma, Sanjay Kumar, Pankaj Tyagi, Shabir Hussain Wani, M N V Prasad Gajula, Krishna Pal Singh
An extensive bioinformatics based study has been performed to gain insight into the structural and functional aspects of candidate genes involved in Nitrogen and Phosphorus nutrition in wheat. Based on our study, 37 N and P nutrition candidate genes were identified (24 NUE and 13 inorganic phosphate transporters) in wheat genome. 23 gene specific novel microsatellites were discovered using genomic sequences of identified N and P nutrition genes. We also identified the microRNAs that target ten candidate genes including TaAS1-3A, TaAS1-3D, TaASN2-1A, TaASN2-1B, TaANR1-6A, TaANR1-6B, TaNRT2...
June 4, 2018: International Journal of Biological Macromolecules
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...
August 15, 2018: Journal of Environmental Management
Parul Goel, Nitesh Kumar Sharma, Monika Bhuria, Vishal Sharma, Rohit Chauhan, Shivalika Pathania, Mohit Kumar Swarnkar, Vandna Chawla, Vishal Acharya, Ravi Shankar, Anil Kumar Singh
Nitrate is the main source of inorganic nitrogen for plants, which also act as signaling molecule. Present study was aimed to understand nitrate regulatory mechanism in Brassica juncea cultivars, with contrasting nitrogen-use-efficiency (NUE) viz. Pusa Bold (PB, high-NUE) and Pusa Jai Kisan (PJK, low-NUE), employing RNA-seq approach. A total of 4031, 3874 and 3667 genes in PB and 2982, 2481 and 2843 genes in PJK were differentially expressed in response to early, low (0.25 mM KNO3 ), medium (2 mM KNO3 ) and high (4 mM KNO3 ) nitrate treatments, respectively, as compared to control (0 mM KNO3 )...
May 10, 2018: Scientific Reports
Julie Dechorgnat, Karen L Francis, Kanwarpal S Dhugga, J A Rafalski, Stephen D Tyerman, Brent N Kaiser
Maize ( Zea mays , L.) yield is strongly influenced by external nitrogen inputs and their availability in the soil solution. Overuse of nitrogen-fertilizers can have detrimental ecological consequences through increased nitrogen pollution of water and the release of the potent greenhouse gas, nitrous oxide. To improve yield and overall nitrogen use efficiency (NUE), a deeper understanding of nitrogen uptake and utilization is required. This study examines the performance of two contrasting maize inbred lines, B73 and F44...
2018: Frontiers in Plant Science
Runhong Gao, Guimei Guo, Chunyan Fang, Saihua Huang, Jianmin Chen, Ruiju Lu, Jianhua Huang, Xiaorong Fan, Chenghong Liu
In vitro mutagenesis via isolated microspore culture provides an efficient way to produce numerous double haploid (DH) lines with mutation introduction and homozygosity stabilization, which can be used for screening directly. In this study, 356 DH lines were produced from the malt barley ( Hordeum vulgare L.) cultivar Hua-30 via microspore mutagenic treatment with ethyl methane sulfonate or pingyangmycin during in vitro culture. The lines were subjected to field screening under high nitrogen (HN) and low nitrogen (LN) conditions, and the number of productive tillers was used as the main screening index...
2018: Frontiers in Plant Science
Dennis P Swaney, Robert W Howarth, Bongghi Hong
National-level summaries of crop production and nutrient use efficiency, important for international comparisons, only partially elucidate agricultural dynamics within a country. Agricultural production and associated environmental impacts in large countries vary significantly because of regional differences in crops, climate, resource use and production practices. Here, we review patterns of regional crop production, nitrogen use efficiency (NUE), and major inputs of nitrogen to US crops over 1987-2012, based on the Farm Resource Regions developed by the Economic Research Service (USDA-ERS)...
September 1, 2018: Science of the Total Environment
Tianqi Liu, Jinfeng Huang, Kaibin Chai, Cougui Cao, Chengfang Li
Tillage practices and nitrogen (N) sources are important factors affecting rice production. Few studies, however, have examined the interactions between tillage practices and N fertilizer sources on NH3 volatilization, nitrogen use efficiency (NUE), and rice grain yield. This study aimed to investigate the effects of N fertilizer sources (no N fertilizer, inorganic N fertilizer, organic N fertilizer alone, organic N fertilizer plus inorganic N fertilizer, and slow-release N fertilizer plus inorganic N fertilizer) and tillage practices (no-tillage [NT] and conventional intensive tillage [CT]) on NH3 flux, grain yield, and NUE in the rice field of central China...
2018: Frontiers in Plant Science
Omar Aziz, Saddam Hussain, Muhammad Rizwan, Muhammad Riaz, Saqib Bashir, Lirong Lin, Sajid Mehmood, Muhammad Imran, Rizwan Yaseen, Guoan Lu
The looming water resources worldwide necessitate the development of water-saving technologies in rice production. An open greenhouse experiment was conducted on rice during the summer season of 2016 at Huazhong Agricultural University, Wuhan, China, in order to study the influence of irrigation methods and nitrogen (N) inputs on water productivity, N economy, and grain yield of rice. Two irrigation methods, viz. conventional irrigation (CI) and "thin-shallow-moist-dry" irrigation (TSMDI), and three levels of nitrogen, viz...
June 2018: Environmental Science and Pollution Research International
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"