scholarly journals Organic-Inorganic Fertilization Built Higher Stability of Soil And Root Microbial Networks Than Exclusive Mineral Or Organic Fertilization

Author(s):  
Luhua Yang ◽  
Renhua Sun ◽  
Jungai Li ◽  
Limei Zhai ◽  
Huiling Cui ◽  
...  

Abstract BackgroundRoot microbiome is critical for plant health and performance. Many studies have assessed the impact of agricultural management on soil microbiome. But a comprehensive understanding of how root microbiota is affected by soil types and fertilization is still lacking. It is clear yet whether the stability of root microbiome is affected by fertilization regimes, and whether in the same patterns as soil microbiome. MethodsWe conducted a long-term experiment and investigated the impact of soil type, plant type and fertilization regimes on soil and root bacterial communities using high-throughput sequencing and network analysis.ResultsOur results indicated that microbial network under combined organic-inorganic fertilization had higher stability than exclusive inorganic or organic fertilizer. In addition, fertilization exhibited stronger effects on root microbiome than on soil microbiome. While total nitrogen mainly contributes to the variance of root microbiome, pH and soil organic matter were responsible for the differences of soil microbiome. Bacteroidetes and Firmicutes appeared as important drivers in soil and root microbiome amended with organic fertilizer, whereas Actinobacteria was enriched in the soil microbiome under inorganic fertilizer. ConclusionsOur results clearly indicated the responsive shifts of soil and root microbiome to different fertilization regimes, and gave hints for developing better fertilization practices and establishing healthy root associated microbiota.

2018 ◽  
Vol 35 (4) ◽  
pp. 133-136
Author(s):  
R. N. Ibragimov

The article examines the impact of internal and external risks on the stability of the financial system of the Altai Territory. Classification of internal and external risks of decline, affecting the sustainable development of the financial system, is presented. A risk management strategy is proposed that will allow monitoring of risks, thereby these measures will help reduce the loss of financial stability and ensure the long-term development of the economy of the region.


2010 ◽  
Vol 113-116 ◽  
pp. 1332-1335 ◽  
Author(s):  
Ning Liu ◽  
Hong Bo He ◽  
Hong Tu Xie ◽  
Zhen Bai ◽  
Xu Dong Zhang

Fertilization is one of the essential managements to maintain and increase soil organic carbon (SOC) level in agroecosystems. It has been realized that fertilizer applications influenced the turnover of labile and refractory organic carbon pools in arable soil markedly. However, the dynamic of relatively refractory lignin in response to fertilization is still kept unclear. Therefore, the impact of long-term organic fertilization on the content and degradation degree of lignin in Mollisol was investigated. Lignin monomers were released by alkaline CuO oxidation method and quantified by gas chromatography (GC). At the time scale of decades, lignin was clearly accumulated in soil and the relative accumulation of lignin in SOC was evident after long-term organic fertilizer application. Compared with the unfertilized soil, lower acid to aldehyde ratios of vanillyl and syringyl units induced by organic fertilization suggested a lower degradation degree of lignin incorporated into soil to some extent. It could be concluded that long-term organic fertilization was an effective fertilizer practice for lignin accumulation in soil and SOC sequestration in Mollisol in northeast of China.


2013 ◽  
Vol 136 (6) ◽  
Author(s):  
Subenuka Sivagnanasundaram ◽  
Stephen Spence ◽  
Juliana Early

This paper presents an investigation of map width enhancement and the performance improvement of a turbocharger compressor using a series of static vanes in the annular cavity of a classical bleed slot system. The investigation has been carried out using both experimental and numerical analysis. The compressor stage used for this study is from a turbocharger unit used in heavy duty diesel engines of approximately 300 kW. Two types of vanes were designed and added to the annular cavity of the baseline classical bleed slot system. The purpose of the annular cavity vane technique is to remove some of the swirl that can be carried through the bleed slot system, which would influence the pressure ratio. In addition to this, the series of cavity vanes provides a better guidance to the slot recirculating flow before it mixes with the impeller main inlet flow. Better guidance of the flow improves the mixing at the inducer inlet in the circumferential direction. As a consequence, the stability of the compressor is improved at lower flow rates and a wider map can be achieved. The impact of two cavity vane designs on the map width and performance of the compressor was highlighted through a detailed analysis of the impeller flow field. The numerical and experimental study revealed that an effective vane design can improve the map width and pressure ratio characteristic without an efficiency penalty compared to the classical bleed slot system without vanes. The comparison study between the cavity vane and noncavity vane configurations presented in this paper showed that the map width was improved by 14.3% due to a significant reduction in surge flow and the peak pressure ratio was improved by 2.25% with the addition of a series of cavity vanes in the annular cavity of the bleed slot system.


Author(s):  
Puja Sareen ◽  
Parikshit Joshi

<em>Organizational learning has the potential to improve organizational performance. For any organization to sustain long term benefits it requires to establish a mechanism to tap the knowledge and use this knowledge in taking future decisions. This study tries to capture the role of Organizational Learning and Employee Motivation and its impact on the Employees’ Performance. The study is exploratory and descriptive in nature. The questionnaire used for primary data collection has its items collected and derived from various standardized questionnaires available. The analysis of the primary data shows that there is a positive correlation between Organizational Learning and Organizational Performance. On understanding Herzberg theory of motivation the study came to conclusion that employees consider hygiene factors of motivation more significant than the motivator factors. The motivation level of employees in an organization has positive impact on the overall performance of any organization. The study helps the organizations to understand the relationship between learning and performance considering motivation as a mediating variable. </em>


2019 ◽  
Author(s):  
Linus Holm ◽  
Gustaf Wadenholt ◽  
Paul Schrater

Humans often appear to desire information for its own sake, but it is presently unclear what drives this desire. The important role that resolving uncertainty plays in stimulating information seeking has suggested a tight coupling between the intrinsic motivation to gather information and performance gains, and has been construed as a drive for long-term learning. Using a simple asteroid-avoidance game that allows us to study learning and information seeking at an experimental time-scale, we show that we can separate the incentive for information-seeking from a long-term learning outcome, and show that information-seeking is best predicted by per-trial outcome uncertainty. Specifically, our 43 participants were more willing to take time penalties for feedback on trials with uncertain outcomes. We found strong group (R2 = .97) and individual level (mean R2 = .44) support for a linear relationship between feedback request rate and information gain as determined by per-trial outcome uncertainty. This information better reflects filling in the gaps of the episodic record of choice outcomes than long-term skill acquisition or assessment. Our results suggest that this easy to compute quantity can drive information-seeking, potentially allowing simple organisms to intelligently gather information without having to anticipate the impact on future performance.


Author(s):  
Klaus-Dieter Fröhner ◽  
Ze Li

Stability and instability are very important for the layout of real world processes concerning safety and health esp. when planned by scientists. The long‐term investigation of stability was carried out for the last ten years on the basis of the installation and the evaluation of an ergonomically designed outdoor illumination. In the depicted dynamic situation the lighting design influences directly visual discomfort and human performance and in the end stability and instability. The improvement of the adaptation of luminance and its influence on the visual tasks after the rearrangement are presented and discussed. The effective factors on the visual capability and performance of workers, work efficiency and potential accidents in the night shift, and furthermore the accelerators and barriers for the stability of the project are analysed and discussed.


2021 ◽  
Vol 5 (1) ◽  
pp. 123-142
Author(s):  
Kim Foong Jee ◽  
Jia En Joanne Ngui ◽  
Pei Pei Jessica Poh ◽  
Wai Loon Chan ◽  
Yet Siang Wong

This paper examines the relationship between capital structure and performance of firms. The study is confined to plantation sector companies in Malaysia and is based on a sample of 39 firms which listed in Bursa Malaysia for the period from 2009 to 2019. This study uses two performance measures which are ROA and ROE as the dependent variable. Besides, the capital structure measures are the short-term debt, long-term debt, total debt and firm growth, which as the independent variables. Size will be the control variable in this study. Moreover, a fixed-effect panel regression analysis has been used to analyse the impact of capital structure on firm performance. The results indicate that firm performance, which is in term of ROA, have an insignificant relationship with short-term debt (STD) and long-term debt (LTD). For the total debt (TD) and growth, there is a significant relationship with ROA. However, for the performance measured by ROE, it has an insignificant relationship with short-term debt (STD), long-term debt (LTD) and total debt (TD). Furthermore, there is a significant relationship between the growth and the performance firms from plantation sector in Malaysia.


2021 ◽  
Vol 17 ◽  
pp. 47-55
Author(s):  
Olusegun Osho ◽  
Alexander Ehimare Omankhanlen ◽  
Mojisola Fasanmi ◽  
Victoria Akinjare

Considering the possibility of finding a gap and a room for improvement, so much have been written about liquidity and performance. Notwithstanding, the emphasis has been on profitability as a yardstick for performance and little has been done on other areas of performance measurement. The emphasis has also been more on various economic sectors with the exception of the manufacturing industry. This paper intends to look at the impact, if any, of liquidity provision and availability on Nigeria’s manufacturing firm’s performance from the perspective of Economic Value Added (EVA). Economic value-adding is beyond just profitability or liquidity. The firm's value to the stakeholders, its sustainability and long-term values are defined. The study would apply liquidity theories, profitability and the economic value-added theories as it applies to a manufacturing firm in a developing economy like Nigeria. On its methodology, the article data is obtained from the World Bank’s World Development Indicators-WDI and then a regression analysis will be run on the data using the SPSS software and then an analysis of the results of the regression. The last section of the article would conclude and make recommendations from the study outcome and the empirical analysis with respect to the theories.


Author(s):  
Yan Ren ◽  
Jiayong Liu

In order to solve the problem of poor accuracy of traditional microcontroller attachment stability testing method, a microcontroller attachment stability testing method based on biosensor was designed to solve the existing problems. The reliability test index of the microcontroller is established, then the interference of the microcontroller accessory is detected and responded, and the interference detection signal of the microcontroller accessory is selected. The process design of stability detection of microcontroller accessories based on biosensor is completed. The experimental results show that the stability detection method based on biosensor designed in this paper can ensure the stability detection accuracy of microcontroller accessories above 80%, which is more accurate than traditional methods. It can be used to evaluate the stability, reliability and performance of microcontroller accessories in long-term operation.


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