1653 - Continuous application of different fertilizers induced distinct bulk and rhizosphere soils protist communities

2018 ◽  
Author(s):  
Wu Xiong
Keyword(s):  
Rhizosphere Soils ◽  
Continuous Application

Somatic Embryogenesis and In vitro Plant Regeneration in Vigna trilobata (L.) Verd. - A Potential Pasture Legume

1970 ◽  
Vol 19 (1) ◽  
pp. 89-99
Author(s):  
K. Choudhary ◽  
M. Singh ◽  
M. S. Rathore ◽  
N. S. Shekhawat
Keyword(s):  
Somatic Embryogenesis ◽  
Growth Regulators ◽  
Somatic Embryos ◽  
Basal Medium ◽  
Long Term Study ◽  
Continuous Application ◽  
First Time ◽  
Pasture Legume

This long term study demonstrates for the first time that it is possible to propagate embryogenic Vigna trilobata and to subsequently initiate the differentiation of embryos into complete plantlets. Initiation of callus was possible on 2,4-D. Somatic embryos differentiated on modified MS basal nutrient medium with 1.0 mg/l  of 2,4-D and 0.5 mg/l  of Kn. Sustained cell division resulted in globular and heart shape stages of somatic embryos. Transfer of embryos on to a fresh modified MS basal medium with 0.5 mg/l of Kn and 0.5 mg/l of GA3 helped them to attain maturation and germination. However, the propagation of cells, as well as the differentiation of embryos, were inhibited by a continuous application of these growth regulators. For this reason, a long period on medium lacking these growth regulators was necessary before the differentiation of embryos occurred again. The consequences for improving the propagation of embryogenic cultures in Vigna species are discussed. Key words: Pasture  legume, Vigna trilobata, Globular, Heart shape, somatic embryogenesis D.O.I. 10.3329/ptcb.v19i1.4990 Plant Tissue Cult. & Biotech. 19(1): 89-99, 2009 (June)

Nutrition characteristics in root surface and rhizosphere soils of direct-seeding rice in rice-duck eco-farming system

2010 ◽  
Vol 18 (6) ◽  
pp. 1151-1156 ◽  
Author(s):  
Jian-Kai SHEN ◽  
Huang HUANG ◽  
Zhi-Qiang FU ◽  
Yang-Zhu ZHANG ◽  
Pan LONG ◽  
...  
Keyword(s):  
Farming System ◽  
Root Surface ◽  
Direct Seeding ◽  
Rhizosphere Soils

Establishment of a Non-dormant Blueberry (Vaccinium Corymbosum Hybrid) Production System in a Warm Winter Climate

HortScience ◽  
1998 ◽  
Vol 33 (3) ◽  
pp. 529a-529
Author(s):  
Rebecca L. Darnell ◽  
J.G. Williamson ◽  
T.A. Obreza
Keyword(s):  
Production System ◽  
Soil Amendments ◽  
Organic Soil ◽  
Vaccinium Corymbosum ◽  
Flower Bud ◽  
Winter Climate ◽  
Warm Winter ◽  
Canopy Volume ◽  
Continuous Application ◽  
Leaf Retention

A high-density planting of three southern highbush cultivars was established in 1994 in southwest Florida to test the feasibility of a non-dormant blueberry production system. A non-dormant system involves continuous application of nitrogen throughout fall and winter, which enables the plants to avoid the normal dormancy cycle and the concomitant chilling requirement. Three nitrogen fertilizer rates and two organic soil amendments (muncipal solid waste compost and acidic peat) were evaluated for effects on maintaining plant growth in this system. In general, increasing N rates from 84 to 252 kg·ha–1 increased plant canopy volume, leaf retention, and rate of new vegetative budbreak. Plant height and volume were consistently greater for plants grown in the compost compared to the peat amendment, but there were no differences in leaf retention or vegetative budbreak between the two soil amendments. Flower bud density and fruit yield were increased in plants grown in the compost compared to the peat, while N rate had no effect on either. Plants in this non-dormant system have shown no deleterious growth effects, suggesting that establishing a blueberry planting in a warm winter climate is feasible under the described conditions.

scholarly journals Evaluation of a Continuous Decontamination Technology in an Intensive Care Unit

2020 ◽  
Vol 41 (S1) ◽  
pp. s519-s519
Author(s):  
Tami Inman BSN ◽  
David Chansolme
Keyword(s):  
Intensive Care Unit ◽  
Intensive Care ◽  
Urban Hospital ◽  
Patient Room ◽  
Colony Forming Units ◽  
Prevention Interventions ◽  
Continuous Application ◽  
Low Levels ◽  
Healthcare Associated ◽  
Cleaning And Disinfection

Background: The scientific literature increasingly indicates the need for the development of continuous disinfection to address the persistent contamination and recontamination that occurs in the patient rooms despite routine cleaning and disinfection. Methods: To determine a baseline microbial burden level on patient room surfaces in the intensive care unit (ICU) of a large urban hospital, 50 locations were swabbed for total colony-forming units (CFU) and the prevalence of methicillin-resistant Staphylococcus aureus (MRSA). Once the baseline in ICU patient rooms was established, 5 novel decontamination devices were installed in the HVAC ducts near these patient rooms. The devices provide a continuous low-level application of oxidizing molecules, predominately hydrogen peroxide. These molecules exit the duct and circulate in the patient room through normal convection, landing on all surfaces. After activation, environmental sampling was conducted every 4 weeks for 4 months. The effect from continuous low levels of oxidizing molecules on the intrinsic microbial burden and the prevalence of MRSA were analyzed. In addition to external laboratory reports, the facility tracked healthcare-associated infections (HAIs) in the unit. HAI data were averaged by month and were compared to the preactivation average in the same unit. Results: The preactivation average microbial burden found on the 50 locations were 179,000 CFU per 100 in2. The prevalence of MRSA was 71% with an average of 81 CFU per 100 in2. After activation of the devices, levels of microbial burden, prevalence of MRSA, and average monthly HAI rates were all significantly lower on average: 95% reduction in average microbial burden (8,206 CFU per 100 in2); 81% reduction in the prevalence of MRSA (13% vs 71%); 54% reduction in the average of healthcare-onset HAIs. All data were obtained from the averages of sampling data for 4 weeks during the 4-month trial period. Conclusions: The continuous application of low levels of oxidizing molecules throughout the patient rooms of an ICU demonstrated 3 outcomes: reduced overall surface microbial burden, lowered the incidence of MRSA, and significantly decreased the monthly average HAI rate. Please note, the ICU ran other infection prevention interventions at this time, including standard cleaning, as well as and their standard disinfecting techniques.Funding: This study was supported by the CASPR Group.Disclosures: None

Watering techniques and zero-valent iron biochar pH effects on As and Cd concentrations in rice rhizosphere soils, tissues and yield

2021 ◽  
Vol 100 ◽  
pp. 144-157
Author(s):  
Md Shafiqul Islam ◽  
Yali Chen ◽  
Liping Weng ◽  
Jie Ma ◽  
Zulqarnain Haider Khan ◽  
...  
Keyword(s):  
Zero Valent Iron ◽  
Ph Effects ◽  
Rhizosphere Soils ◽  
Rice Rhizosphere

EFFECTS OF GREEN MANURE CONTINUOUS APPLICATION ON SOIL MICROBIAL BIOMASS AND ENZYME ACTIVITY

2014 ◽  
Vol 37 (4) ◽  
pp. 498-508 ◽  
Author(s):  
Xiefeng Ye ◽  
Hongen Liu ◽  
Zheng Li ◽  
Yong Wang ◽  
Yingyuan Wang ◽  
...  
Keyword(s):  
Enzyme Activity ◽  
Microbial Biomass ◽  
Green Manure ◽  
Soil Microbial Biomass ◽  
Soil Microbial ◽  
Continuous Application
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