The Experiment Study of the Pollution of Phthalate Compounds and Heavy Metals to Rice in the Film

2013 ◽  
Vol 864-867 ◽  
pp. 303-306
Author(s):  
Dan Dan Xu ◽  
De Shen Liu
Keyword(s):  
Heavy Metals ◽  
Soil Structure ◽  
Rice Seedling ◽  
Plastic Film ◽  
Paper Study ◽  
Rice Seedlings ◽  
Experiment Study ◽  
Long Run ◽  
Plastic Mulching ◽  
Negative Effect

With the popularity of plastic mulching technology, the residual agricultural mulch bring more and more negative effect. They destroy the soil structure and harm crops, so effect the agricultural environment. By means of pot and field experiment for rice growth periods, this paper study the content of DBP and DEHP, Pb and Cd in the plants are differences in different film residues at 850 farm in Heilongjiang. Experimental results show that people detect DBP content in plant rice, but DEHP composition has not been detected. Rice seedling DBP content was lower than harvest stem DBP content was lower than grain content. Rice seedlings to Pb and Cd content ripe grains in plants are within the normal concentration; its content requirements are still in the plant growth referral levels. The use of plastic-film mulch is uneconomic under existing plastic film collecting technology in the long run. And come up with study direction in the future.

Infrastructure mortgage in Russia: Opportunities and prospects

2019 ◽  
pp. 114-133
Author(s):  
G. I. Idrisov ◽  
Y. Yu. Ponomarev
Keyword(s):  
Federal Government ◽  
Public Debt ◽  
Budget Deficit ◽  
Expert Assessment ◽  
Inflation Expectations ◽  
Direct Impact ◽  
Long Run ◽  
Gdp Growth Rate ◽  
Negative Effect

The article shows that depending on the goals pursued by the federal government and the available interbudgetary tools a different design of infrastructure mortgage is preferable. Three variants of such mortgage in Russia are proposed, each of which is better suited for certain types of projects and uses different forms of subsidies. According to our expert assessment the active use of infrastructure mortgage in Russia can increase the average annual GDP growth rate by 0.5 p. p. on the horizon of 5—7 years. In the long run the growth of infrastructure financing through the use of infrastructure mortgage could increase long-term economic growth by 0.9 p. p., which in 20—30 years can add 20—30% of GDP to the economy. However, the change in the structure of budget expenditures in the absence of an increase in the budget deficit and public debt will cause no direct impact on monetary policy. The increase in the deficit and the build-up of public debt will have a negative effect on inflation expectations, which will require monetary tightening for a longer time to stabilize them.

The effect of economic policy uncertainty on US tourism net exports

2021 ◽  
pp. 135481662110253
Author(s):  
Abebe Hailemariam ◽  
Kris Ivanovski
Keyword(s):  
Economic Policy ◽  
Policy Uncertainty ◽  
Structural Vector Autoregression ◽  
Economic Policy Uncertainty ◽  
Vector Autoregression Model ◽  
Long Run ◽  
Negative Effect ◽  
Positive Shock ◽  
Net Export ◽  
Positive Effect

This article models the endogenously interrelated relationship between global economic policy uncertainty (EPU), world industrial production (WIP), and the demand for US tourism net export (TNX) expenditures. To do so, we apply an identified structural vector autoregression model over monthly data spanning from January 1999 to October 2020. Our findings reveal that a positive shock in WIP has a significant positive effect on demand for TNXs. In contrast, unanticipated increases in price and EPU have a statistically significant negative effect on TNXs. Our results show that, in the long run, a one standard deviation shock in global EPU explains about 26.05% of the variations in tourism net service exports.

scholarly journals Dynamic Integrated Model for Assessing Fisheries: Discard Bans as an Implicit Value-Added Tax

2021 ◽  
Author(s):  
Jose Maria Da Rocha ◽  
Javier García-Cutrín ◽  
Maria-Jose Gutiérrez ◽  
Raul Prellezo ◽  
Eduardo Sanchez
Keyword(s):  
Value Added ◽  
Point Of View ◽  
Value Added Tax ◽  
Biological Variables ◽  
A Value ◽  
Long Run ◽  
The Social ◽  
Negative Effect ◽  
Short Run ◽  
The Impact

AbstractIntegrated economic models have become popular for assessing climate change. In this paper we show how these methods can be used to assess the impact of a discard ban in a fishery. We state that a discard ban can be understood as a confiscatory tax equivalent to a value-added tax. Under this framework, we show that a discard ban improves the sustainability of the fishery in the short run and increases economic welfare in the long run. In particular, we show that consumption, capital and wages show an initial decrease just after the implementation of the discard ban then recover after some periods to reach their steady-sate values, which are 16–20% higher than the initial values, depending on the valuation of the landed discards. The discard ban also improves biological variables, increasing landings by 14% and reducing discards by 29% on the initial figures. These patterns highlight the two channels through which discard bans affect a fishery: the tax channel, which shows that the confiscation of landed discards reduces the incentive to invest in the fishery; and the productivity channel, which increases the abundance of the stock. Thus, during the first few years after the implementation of a discard ban, the negative effect from the tax channel dominates the positive effect from the productivity channel, because the stock needs time to recover. Once stock abundance improves, the productivity channel dominates the tax channel and the economic variables rise above their initial levels. Our results also show that a landed discards valorisation policy is optimal from the social welfare point of view provided that incentives to increase discards are not created.

Degradation Mode of PBAT Mulching Film and Control Methods During Its Degradation Induction Period

2021 ◽  
Vol 18 ◽  
Author(s):  
Runmeng Qiao ◽  
Xin Wang ◽  
Guangjiong Qin ◽  
Jialei Liu ◽  
Aocheng Cao ◽  
...  
Keyword(s):  
Research And Development ◽  
Biodegradable Polymers ◽  
Large Scale ◽  
Degradation Process ◽  
Future Research ◽  
Plastic Film ◽  
Plastic Mulching ◽  
Controllable Degradation ◽  
Mulching Film ◽  
Agricultural Film

: The plastic film plays an important role in China's agricultural production. However, the large-scale use of plastic film has also produced a very serious problem of agricultural film pollution. Biodegradable polymers have attracted much attention because of the environmental pollution caused by traditional plastic mulching film. The most typical one is poly (butylene adipate co butylene terephthalate, PBAT). Poly (Butylene Adipate-co-Terephthalate) (PBAT) is a kind of aliphatic–aromatic polyesters with excellent biodegradability and mechanical processing properties. Therefore, it has been rapidly developed and widely used in the industry. However, there are clear requirements for the degradation period of agricultural film. At present, the degradable materials available on the market are difficult to meet the requirements of all crops for their degradation period. In this paper, the basic properties，degradation process and ways to delay the degradation of PBAT are reviewed to improve the degradation period of plastic film prepared by using this kind of material. Among them, the degradation process includes photodegradation, biodegradation and hydrolysis. The ways to delay the degradation include adding chain extender, light stabilizer, anti-hydrolysis agent and antibacterial agent. These can provide a theoretical basis for the research and development of biodegradable film with controllable degradation cycle. The future research and development of biodegradable polymers mainly focus on controllable degradation rate, stable degradation cycle, new materials and reducing research and development costs.

Effect of prothioconazole on the degradation of microplastics derived from mulching plastic film: Apparent change and interaction with heavy metals in soil

2020 ◽  
Vol 260 ◽  
pp. 113988 ◽  
Author(s):  
Ruojia Li ◽  
Yi Liu ◽  
Yingfei Sheng ◽  
Qingqing Xiang ◽  
Ying Zhou ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Plastic Film ◽  
Apparent Change

The growth-volatility relationship redux: what does volatility decomposition tell?

2018 ◽  
Vol 19 (2) ◽  
Author(s):  
Debdulal Mallick
Keyword(s):  
Business Cycle ◽  
Empirical Relationship ◽  
Growth Trajectories ◽  
Crucial Question ◽  
Long Run ◽  
Negative Effect ◽  
Growth Volatility

AbstractThis paper revisits the empirical relationship between volatility and long-run growth, but the key contribution lies in decomposing growth volatility into its business-cycle and trend components. This volatility decomposition also accounts for enormous heterogeneity among countries in terms of their long-run growth trajectories. We identify a negative effect of trend volatility, which we refer to as long-run volatility, on growth, but no effect of business-cycle volatility. However, if long-run volatility is omitted, there would be a spurious (negative) effect of business-cycle volatility. Our results draw attention to a crucial question about different volatility measures and their implications in macroeconomic analyses.

scholarly journals Effects of Light Quality on the Chlorophyll Degradation Pathway in Rice Seedling Leaves

2016 ◽  
Vol 44 (2) ◽  
pp. 393-398
Author(s):  
Chang-Chang CHEN ◽  
Kuan-Hung LIN ◽  
Meng-Yuan HUANG ◽  
Wen-Dar HUANG ◽  
Chi-Ming YANG
Keyword(s):  
Light Quality ◽  
Protoporphyrin Ix ◽  
Degradation Pathway ◽  
Photosynthetic Photon Flux Density ◽  
Rice Seedling ◽  
Photon Flux ◽  
Photon Flux Density ◽  
Rice Seedlings ◽  
Rice Varieties ◽  
Enriched Environments

The objective of this study was to investigate the dynamics of chlorophyll (Chl), biosynthetic intermediates (protoporphyrin IX, magnesium protoporphyrin IX, and protochlorophyllide), degradation intermediates [chlorophyllide (Chlide), pheophytin (Phe), and pheophorbide (Pho)], and carotenoids (Car) in leaves of rice seedlings. Two rice varieties, 'Taichung Shen 10' ('TCS10') and 'IR1552', were grown under different light quality conditions controlled by light emitting diodes (LED). Lighting treatments for rice seedlings were included by red (R), blue (B), green (G), and red + blue (RB), with fluorescent lighting (FL) as the control and photosynthetic photon flux density being set at 105 µmol m-2 s-1. The results show that lower levels of Chl and Car in leaves were detected under G lighting, and light quality did not mediate porphyrins in biosynthetic pathways. Rice seedling leaves took Chl→Phe→Pho and Chl→Chlide→Pho as the major and minor degradation routes, respectively. Furthermore, higher Phe/Chlide ratios were observed under G and FL lighting conditions, indicating that green-enriched environments can up-regulate the minor degradation route in leaves.

scholarly journals INFLASI DARI SUDUT PANDANG MONETER DAN FISKAL (STUDI KASUS SUMATERA BARAT)

2019 ◽  
Vol 1 (1) ◽  
pp. 131
Author(s):  
Zul Azhar ◽  
Alpon Satrianto ◽  
Nofitasari Nofitasari
Keyword(s):  
Interest Rate ◽  
Money Supply ◽  
Government Spending ◽  
Descriptive Research ◽  
Distributed Lag ◽  
Long Run ◽  
Negative Effect ◽  
Short Run ◽  
The Interest Rate ◽  
Positive Effect

This study aims to analyze the effect of money supply M2, interest rate, government spending and local tax on the inflation in West Sumatera. This type of research is descriptive research and secondary datain the form of time-series from quartely 1 2007 to 2017 quartely 4 using the method of Autoregresive Distributed Lag analysis. The results of this study indicate that money supply in the long run have a significant and positive effect on inflation West Sumatera. In the short run  and long run the interest rate has a significant and positive effect on inflation in West Sumatera. Government spending in the Long run has a significant and negative effect on inflation in West Sumatera. Based on the result of this study can be concluded that there is inflation in West Sumatera is monetery of phenomenon in the long run. 

scholarly journals INTERVENSI KEBIJAKAN MONETER TERHADAP INVESTASI PORTOFOLIO: KASUS INDONESIA DAN AMERIKA SERIKAT

2020 ◽  
Vol 2 (1) ◽  
pp. 1
Author(s):  
Nanda Alfarina ◽  
Hasdi Aimon
Keyword(s):  
United States ◽  
Interest Rate ◽  
Secondary Data ◽  
The United States ◽  
Portfolio Investment ◽  
Mechanism Analysis ◽  
Long Run ◽  
Negative Effect ◽  
The Difference ◽  
Effect Of Monetary Policy

This study aims to determine the effect of monetary policy measured by the central bank’s policy rate (X1) on portfolio investment (Y) in Indonesia and United States in the long run. The data used are secondary data seouced from SEKI BI, FRED The FEd, coinmarketcap.com, and investing.com, with the VECM (Vector Error Correction Mechanism) analysis methode. The study show The study shows the differences between the results that occur in Indonesia and the United States. The policy interest rate has a significant positive effect on portfolio investment in the long run in Indonesia, while in the United States the interest rate in the long run has a significant negative effect on portfolio investment. The difference in research results between the two countries shows the need for different treatment for monetary authorities in encouraging portfolio investment 

scholarly journals Cotton Imports and GDP of Indonesia- Cointegration Analysis

2021 ◽  
pp. 149-154
Author(s):  
P. Soumya ◽  
R. A. Yeledhalli
Keyword(s):  
High Speed ◽  
Cointegration Analysis ◽  
Causality Analysis ◽  
The Real ◽  
Real Gdp ◽  
Use Of Technology ◽  
Long Run ◽  
Negative Effect ◽  
The Government ◽  
The Impact

The study examines the impact of cotton imports on the real GDP (Gross Domestic Product) of Indonesia for a period from 1992 to 2018 using ARDL approach and Granger causality analysis. Results of the study indicated that cotton imports have negative effect on economic growth. For every 1% increase in cotton imports the real GDP decreased by 0.107% in the long run. Any disequilibrium in the model is adjusted with a high speed of adjustment of 107.7% in less than a year. Shocks and the trend are adjusted in less than one year. There is no causality between imports of cotton and the real GDP. The study suggested effort should be taken by the government to increase yield of cotton by the use of technology and also a need to initiate farmers to take up cotton farming. 

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