keyword
MENU ▼
Read by QxMD icon Read
search

Meaning

keyword
https://www.readbyqxmd.com/read/29692102/-soil-olsen-p-content-changing-trend-and-its-relationship-with-phosphorus-surplus-and-crop-yield-under-long-term-fertilization-in-loessial-soil-region-on-the-loess-plateau-china
#1
Sheng Zhe E, Zhi Qi Yang, Xi Bai Zeng, Ya Nan Wang, Zhao Xia Luo, Jin Hua Yuan, Zong Xian Che
The changing trend of soil available phosphorus (Olsen-P) content in soil and its relationship with soil phosphorus surplus and crop yield are fundamental when making appropriate phosphate fertilizer recommendations. In this paper, the influences of long-term fertilization on crops phosphorus uptake, soil phosphorus surplus, changing trend of soil available phosphorus content and relationships of soil available phosphorus content with soil phosphorus surplus and crop yield were investigated through 34 years (1981-2015) long-term trial in loessial soil region on the Loess Plateau...
November 2017: Ying Yong Sheng Tai Xue Bao, the Journal of Applied Ecology
https://www.readbyqxmd.com/read/29692097/-spatial-heterogeneity-of-soil-moisture-of-mountain-apple-orchards-with-rainwater-collection-and-infiltration-rwci-system-in-the-loess-plateau-china
#2
Xiao Lin Song, Xi Ning Zhao, Xiao Dong Gao, Pu Te Wu, Wen Ma, Jie Yao, Xiao Li Jiang, Wei Zhang
Water scarcity is a critical factor influencing rain-fed agricultural production on the Loess Plateau, and the exploitation of rainwater is an effective avenue to alleviate water scarcity in this area. This study was conducted to investigate the spatial and temporal distribution of soil moisture in the 0-300 cm under a 21-year-old apple orchard with the rainwater collection and infiltration (RWCI) system by using a time domain reflectometer (TDR) probe on the Loess Plateau. The results showed that there was a low soil moisture zone in the 40-80 cm under the CK, and the RWCI system significantly increased soil moisture in this depth interval...
November 2017: Ying Yong Sheng Tai Xue Bao, the Journal of Applied Ecology
https://www.readbyqxmd.com/read/29692086/-response-of-radial-growth-of-pinus-koraiensis-and-picea-jezoensis-to-climate-change-in-xiao-xing-anling-mountains-northeast-china
#3
Jian Yu, Qi Jing Liu, Guang Zhou, Sheng Wang Meng, Hua Zhou, Zhen Zhao Xu, Jing Ning Shi, Wen Xian Du
Based on dendrochronological methods, we established residual chronologies of Pinus koraiensis and Picea jezoensis, with the dominant species of broadleaved Korean pine mixed forest at low altitudes chosen as the research object, to identify the key climatic factors affecting the radial growth of the two species in Xiaoxing'anling Mountains, Northeast China. The results showed that the responses of the two species to climate factors were different, and P. koraiensis was more sensitive, and hence more suitable for dendroclimatological analysis...
November 2017: Ying Yong Sheng Tai Xue Bao, the Journal of Applied Ecology
https://www.readbyqxmd.com/read/29692076/-differences-of-vegetation-phenology-monitoring-by-remote-sensing-based-on-different-spectral-vegetation-indices
#4
Lu Zuo, Huan Jiong Wang, Rong Gao Liu, Yang Liu, Rong Shang
Vegetation phenology is a comprehensive indictor for the responses of terrestrial ecosystem to climatic and environmental changes. Remote sensing spectrum has been widely used in the extraction of vegetation phenology information. However, there are many differences between phenology extracted by remote sensing and site observations, with their physical meaning remaining unclear. We selected one tile of MODIS data in northeastern China (2000-2014) to examine the SOS and EOS differences derived from the normalized difference vegetation index (NDVI) and the simple ratio vegetation index (SR) based on both the red and near-infrared bands...
February 2018: Ying Yong Sheng Tai Xue Bao, the Journal of Applied Ecology
https://www.readbyqxmd.com/read/29692073/-effects-of-different-tillage-patterns-on-soil-properties-maize-yield-and-water-use-efficiency-in-weibei-highland-china
#5
Dan Liu, Xia Zhang, Jun Li, Xu-Dong Wang
An eight-year field experiment of straw returning was conducted on dark loessial soil in Weibei Highland to investigate the effects of tillage patterns on soil aggregate, soil organic carbon (SOC), corn yield and soil water use efficiency (WUE). There were six tillage patterns, including conventional tillage (CT/CT), no-tillage (NT/NT), subsoiling tillage (ST/ST), no-tillage/subsoiling tillage (NT/ST), conventional tillage/no-tillage (CT/NT) and conventional tillage/subsoiling tillage (CT/ST). The results showed that compared with CT/CT, the patterns of NT/NT, ST/ST and the rotational tillage patterns (NT/ST, CT/NT and CT/ST) decreased the mean mass diameter of soil mechanical stable aggregate...
February 2018: Ying Yong Sheng Tai Xue Bao, the Journal of Applied Ecology
https://www.readbyqxmd.com/read/29692069/-structure-characteristics-of-soil-and-canopy-and-their-relationships-in-wheat-field-under-different-tillage-and-application-of-organic-fertilizer
#6
Dai Jing Zhang, Yan Yan Zhang, Yan Jie Wang, Qian Qing Chen, Hui Li Yang, Jian Hui Ma, Chun Xi Li
With the aim to optimize the structural characteristics of wheat canopy by improving topsoil structure, we examined the effects of three different tillage treatments, deep tillage (DT), shallow tillage (ST), no-tillage (NT) alone, and with application of organic fertilizer, DTF, STF and NTF, on the soil structure and wheat canopy characteristics for five years. Under the same tillage treatment, application of organic fertilizer decreased soil bulk density, the content of soil aggregates with diameter > 5 mm, the mean mass diameter (MWD), and geometric mean diameter (GMD) values of the soil aggregates with diameter >0...
February 2018: Ying Yong Sheng Tai Xue Bao, the Journal of Applied Ecology
https://www.readbyqxmd.com/read/29692058/-relationships-between-leaf-functional-traits-of-machilus-pauhoi-understory-seedlings-from-different-provenances-and-geographical-environmental-factors
#7
Hua Yu, Quan Lin Zhong, Yun Bo Huang, Dong Liang Cheng, Pan Pei, Zhong Rui Zhang, Chao Bin Xui, Wen Ting Zheng
To understand the adaptation mechanism of Machilus pauhoi seedlings to environmental changes, leaf functional traits of M. pauhoi seedlings from nine provenances, as well as relationships between leaf traits and environmental factors were analyzed. The results showed that leaf functional traits of M. pauhoi seedlings from different provenances showed significant intraspecific variations, with the coefficient of variation ranging from 8.8% to 28.2%. Specific leaf area, leaf relative water content, leaf tissue density and leaf thickness differed significantly among seedlings from different provenances, implying high leaf morphological plasticity...
February 2018: Ying Yong Sheng Tai Xue Bao, the Journal of Applied Ecology
https://www.readbyqxmd.com/read/29692055/-multi-temporal-scale-analysis-of-impacts-of-extreme-high-temperature-on-net-carbon-uptake-in-subtropical-coniferous-plantation
#8
Mi Zhang, Xue Fa Wen, Lei Ming Zhang, Hui Min Wang, Yi Wen Guo, Gui Rui Yu
Extreme high temperature is one of important extreme weathers that impact forest ecosystem carbon cycle. In this study, applying CO2 flux and routine meteorological data measured during 2003-2012, we examined the impacts of extreme high temperature and extreme high temperature event on net carbon uptake of subtropical coniferous plantation in Qianyanzhou. Combining with wavelet analysis, we analyzed environmental controls on net carbon uptake at different temporal scales, when the extreme high temperature and extreme high temperature event happened...
February 2018: Ying Yong Sheng Tai Xue Bao, the Journal of Applied Ecology
https://www.readbyqxmd.com/read/29692054/-dynamic-change-of-pinus-tabuliformis-forest-productivity-and-its-response-to-future-climate-change-in-shaanxi-province-china
#9
Xiao Ying Huo, Shou Zhang Peng, Jing Yu Ren, Yang Cao, Yun Ming Chen
This study analyzed the dynamics of net primary productivity (NPP) of Pinus tabuliformis forest under future climate scenarios in Shaanxi Province during 2015-2100, using a dynamic vegetation model (LPJ-GUESS). The results showed that in the 2015-2100 period, annual mean temperature of this region would significantly increase by 0.12, 0.23 and 0.54 ℃·10 a-1 under RCP2.6 , RCP4.5 and RCP8.5 scenarios, respectively, while the annual precipitation would have no significant change under climate scenarios except RCP4...
February 2018: Ying Yong Sheng Tai Xue Bao, the Journal of Applied Ecology
https://www.readbyqxmd.com/read/29692050/-carbon-nitrogen-and-phosphorus-stoichiometry-of-five-common-herbaceous-species-across-islands-in-the-yellow-sea-and-the-east-china-sea
#10
Chao Guo, Bin Tuo, Tian Su, Li Ting Zheng, Xiang Yu Liu, Fang Yin, Dong He, En- Ong Yan
Understanding variation of carbon (C), nitrogen (N) and phosphorus (P) stoichiometry in common plant species across islands along a latitude gradient is insightful to reveal the adaptation strategies of plant species to environmental changes. Five common herbaceous species including Artemisia argyi, Setaira viridis, Humulus japonicus, Ophiopog onjaponicus, and Oxalis corniculata were sampled in 125 plots across nine islands in Eastern China. C, N and P contents in leaves, stems, and roots of five plant species were measured, and their relationships with soil C, N and P contents as well as mean annual air temperature (MAT) and mean annual precipitation (MAP) were investigated...
February 2018: Ying Yong Sheng Tai Xue Bao, the Journal of Applied Ecology
https://www.readbyqxmd.com/read/29692038/-interannual-changes-in-fish-community-structure-in-the-northern-part-of-the-coastal-waters-of-jiangsu-province-china-in-spring
#11
Jia Wo, Xiu Xia Mou, Bin Duo Xu, Ying Xue, Chong Liang Zhang, Yi Ping Ren
Based on the data collected from the bottom trawl surveys in the coastal waters of northern Jiangsu Province from 2009 to 2014, multivariate statistical analysis and other integrated indices were used to analyze the variation in the community structure of fish assemblage over time in the waters. The results showed that 68 species had been caught in the coastal waters of northern Jiangsu Province. There were significant fluctuations in the relative density of fish resources. The mean catch mass per site ranged from 0...
January 2018: Ying Yong Sheng Tai Xue Bao, the Journal of Applied Ecology
https://www.readbyqxmd.com/read/29692036/-effects-of-drying-and-wetting-cycles-induced-by-tides-on-net-ecosystem-exchange-of-co-2-over-a-salt-marsh-in-the-yellow-river-delta-china
#12
Wen Jun He, Guang Xuan Han, Yan Ning Xu, Xi Tao Zhang, An Dong Wang, Chun Guang Che, Bao Yu Sun, Xiao Shuai Zhang
As a unique hydrological characteristic, the tidal action can strongly affect carbon balance in a salt marsh despite their short duration. Using the eddy covariance technique, we measured the net ecosystem CO2 exchange (NEE) and its environmental factors and tidal change over a salt marsh in the Yellow River Delta. It aimed to investigate the effect of tidal process and drying and wetting cycles induced by tides on NEE. The results showed that the tidal process promoted the daytime CO2 uptake, but it didn't clearly affect the nighttime CO2 release...
January 2018: Ying Yong Sheng Tai Xue Bao, the Journal of Applied Ecology
https://www.readbyqxmd.com/read/29692033/-spatial-interpolation-model-of-soil-organic-carbon-density-considering-land-use-and-spatial-heterogeneity
#13
Zi Hao Wu, Yan Fang Liu, Yi Yun Chen, Long Guo, Qing Hu Jiang, Shao Chen Wang
Soil organic carbon pool is an important component of terrestrial carbon pool. Soil organic carbon pool and its dynamic change have important influence on carbon cycle in terrestrial ecosystem. Soil organic carbon density (SOCD) is an important parameter of soil carbon storage, and it is also an important index to evaluate farmland soil quality. Accurate prediction of regional organic carbon density spatial distribution is of great significance to the development of precision agriculture. A total of 242 farmland soil samples collected from the Jianghan Plain were used to explore the effects of land use types on the spatial distribution of SOCD in plain areas...
January 2018: Ying Yong Sheng Tai Xue Bao, the Journal of Applied Ecology
https://www.readbyqxmd.com/read/29692019/-effects-of-different-colored-plastic-film-mulching-and-planting-density-on-dry-matter-accumulation-and-yield-of-spring-maize
#14
Lin Lin Zhang, Shi Jun Sun, Zhi Jun Chen, Hao Jiang, Xu Dong Zhang, Dao Cai Chi
In order to investigate the effect of different colored plastic film mulching and planting density on spring maize dry matter accumulation and yield in the rain-fed area of the Northeast China, a complete combination field experiment which was comprised by three types of mulching (non-mulching, transparent plastic film mulching and black plastic film mulching) and five densities (60000, 67500, 75000, 82500 and 90000 plants·hm-2 ), was conducted to analyze the water and heat effect, dry matter accumulation and yield of spring maize (Liangyu 99)...
January 2018: Ying Yong Sheng Tai Xue Bao, the Journal of Applied Ecology
https://www.readbyqxmd.com/read/29692018/-spatial-temporal-variations-of-spring-maize-potential-yields-in-a-changing-climate-in-northeast-china
#15
Zhi Juan Liu, Xiao Guang Yang, Shuo Lyu, Jing Wang, Xiao Mao Lin
Based on meteorological data, agro-meteorological observations, and agricultural statistical data in Northeast China (NEC), by using the validated Agricultural Production System sIMulator (APSIM-maize), the potential, attainable, potential farmers' and actual farmers' yields of spring maize during the period 1961 to 2015 were analyzed, and the effects of climate variation on maize potential yield in NEC were quantified. Results indicated that the potential yield of spring maize was 12.2 t·hm-2 during the period 1961 to 2015, with those in northeast being lower than southwest within the study region...
January 2018: Ying Yong Sheng Tai Xue Bao, the Journal of Applied Ecology
https://www.readbyqxmd.com/read/29692000/phloroglucinol-derivatives-from-the-fruits-of-eucalyptus-globulus-and-their-cytotoxic-activities
#16
Pham Thi-Anh, Imran Shair Mohammad, Vu Van-Tuan, Hu Xiao-Long, Chaurasiya Birendra, Aftab Ulah, Guo Cui, Lv Xian-Yu, Ye Wen-Cai, Wang Hao
A new phloroglucinol derivative, named Eucalyptin B (1), along with five related known compounds (2-6), was isolated from the fruits of Eucalyptus globulus. Their structures were elucidated by means of 1D and 2D NMR spectroscopy, with the absolute configuration of 1 determined by electronic circular dichroism (ECD) calculations. All isolated compounds (1-6) were evaluated for their cytotoxic activities against lung (A549), breast (4T1), and skin (B16F10) cancer cell lines. On the basis of cytoxicity the antitumor activity of Eucalyptin B (1) was further confirmed by apoptosis assay...
April 24, 2018: Chemistry & Biodiversity
https://www.readbyqxmd.com/read/29691997/mortality-after-endophthalmitis-following-contemporary-phacoemulsification-cataract-surgery
#17
Philip J Polkinghorne, Niall Crosby, Bia Kim, Charles McGhee, Sarah Welch, Andrew Riley, Philip J Polkinghorne
IMPORTANCE: To determine if endophthamitis following cataract surgery is linked to increased mortality. BACKGROUND: Increased mortality has been linked to patients with cataract and cataract surgery. We tested the hypothesis that post-cataract endophthalitis has a greater risk of death than pseudo-phakes who don't develop this complication. DESIGN: Case control study conducted in a tertiary public hospital. PARTICIPANTS: The study group comprised of 50 consecutive patients with post-cataract endophthalmitis and these were matched selected controls...
April 24, 2018: Clinical & Experimental Ophthalmology
https://www.readbyqxmd.com/read/29691992/breastfeeding-and-growth-during-infancy-among-offspring-of-mothers-with-gestational-diabetes-mellitus-a-prospective-cohort-study
#18
E P Gunderson, L C Greenspan, M S Faith, S R Hurston, C P Quesenberry
BACKGROUND: Breastfeeding (BF) may protect against obesity and type 2 diabetes mellitus in children exposed to maternal diabetes in utero, but its effects on infant growth among this high-risk group have rarely been evaluated. OBJECTIVES: The objective of this study was to evaluate BF intensity and duration in relation to infant growth from birth through 12 months among offspring of mothers with gestational diabetes mellitus (GDM). METHODS: Prospective cohort of 464 GDM mother-infant dyads (28% White, 36% Hispanic, 26% Asian, 8% Black, 2% other)...
April 24, 2018: Pediatric Obesity
https://www.readbyqxmd.com/read/29691987/accuracy-of-the-match-between-cone-beam-computed-tomography-and-model-scan-data-in-template-guided-implant-planning-a-prospective-controlled-clinical-study
#19
Sigmar Schnutenhaus, Sebastian Gröller, Ralph G Luthardt, Heike Rudolph
BACKGROUND: Template-guided implant placement is a method for optimal implant positioning from a prosthetic and surgical viewpoint. The treatment planning is based on three-dimensional X-ray data and model scan data, as well as on prosthetic planning (set-up). These data are matched (superimposed) with the aid of an X-ray template or by manual matching without special referencing. PURPOSE: The objective of this prospective controlled clinical study was to determine and compare the accuracy of the match with and without an additional X-ray template...
April 25, 2018: Clinical Implant Dentistry and related Research
https://www.readbyqxmd.com/read/29691974/aboriginal-experiences-of-cancer-and-care-coordination-lessons-from-the-cancer-data-and-aboriginal-disparities-candad-narratives
#20
Rachel Reilly, Jasmine Micklem, Paul Yerrell, David Banham, Kim Morey, Janet Stajic, Marion Eckert, Monica Lawrence, Harold B Stewart, Alex Brown
BACKGROUND: Aboriginal people with cancer experience worse outcomes than other Australians for a range of complex and interrelated reasons. A younger age at diagnosis, higher likelihood of more advanced cancer or cancer type with poorer prognosis, geographic isolation and cultural and language diversity mean that patient pathways are potentially more complex for Aboriginal people with cancer. In addition, variation in the quality and acceptability of care may influence cancer outcomes...
April 24, 2018: Health Expectations: An International Journal of Public Participation in Health Care and Health Policy
keyword
keyword
58110
1
2
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"