scholarly journals Effects of Corn Stalks and Urea on N2O Production from Corn Field Soil

Agronomy ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 2009
Author(s):  
Kaikuo Wu ◽  
Zhe Zhang ◽  
Liangshan Feng ◽  
Wei Bai ◽  
Chen Feng ◽  
...  
Keyword(s):  
Management Practice ◽  
N2o Emissions ◽  
Field Soil ◽  
N2o Production ◽  
The Sustainable Development ◽  
Combined Application ◽  
Corn Field ◽  
Native Soil ◽  
History Of ◽  
Corn Residue

Returning corn stalks to the field is an important and widely used soil management practice which is conducive to the sustainable development of agriculture. In this study, the effects of corn stalks and urea on N2O production in corn field soil were investigated through a 21-day incubation experiment. This study showed that increasing amounts of urea added to soil with a history of corn cultivation leads to increasing overall N2O emissions, by increasing both the intensity and the duration of emissions. Although N2O production was affected primarily by urea-derived NH4+-N and NO3−-N, its main source was native soil nitrogen, which accounted for 78.5 to 94.5% of N2O. Returning corn stalk residue to the field reduced the production of N2O, and the more urea was applied, the stronger the effect of corn residue on reducing N2O emissions. Combining the application of corn stalks and urea could reduce the concentration of NH4+-N and NO3−-N derived from urea, and then reduce the substrate required for N2O production in nitrification and denitrification processes. In addition, the combined application of corn stalks and urea could effectively inhibit the abundance of key N2O-producing genes AOA amoA, nirS and nirK.

The Research on the Strategies for Sustainable Development and Environmental Protection

2013 ◽  
Vol 869-870 ◽  
pp. 786-790
Author(s):  
Chen Chen Zhang
Keyword(s):  
Sustainable Development ◽  
Environmental Protection ◽  
Development Strategy ◽  
Protection Measures ◽  
The Sustainable Development ◽  
National Economic ◽  
History Of ◽  
Dialectical Relationship ◽  
Relationship Of

The strategies for sustainable development have been included in the medium and long term plan of 2010 for national economic and social development. Protecting the environment is the most important prerequisite and safeguards for the sustainable development strategy. In the study, we described the history of the environmental problems in the world, the proposal and implications of sustainable development, and outlined the dialectical relationship of development with the environment. The environmental protection measures for sustainable development were proposed here, according to the environmental situation severely affecting its biophysical environment.

scholarly journals Nitrogen and oxygen availabilities control water column nitrous oxide production during seasonal anoxia in the Chesapeake Bay

2018 ◽  
Vol 15 (20) ◽  
pp. 6127-6138 ◽  
Author(s):  
Qixing Ji ◽  
Claudia Frey ◽  
Xin Sun ◽  
Melanie Jackson ◽  
Yea-Shine Lee ◽  
...  
Keyword(s):  
Nitrous Oxide ◽  
Chesapeake Bay ◽  
Water Column ◽  
N2o Emissions ◽  
N2o Production ◽  
Isotope Tracer ◽  
Relative Contribution ◽  
Environmental Controls ◽  
Long Run ◽  
Nitrate And Nitrite

Abstract. Nitrous oxide (N2O) is a greenhouse gas and an ozone depletion agent. Estuaries that are subject to seasonal anoxia are generally regarded as N2O sources. However, insufficient understanding of the environmental controls on N2O production results in large uncertainty about the estuarine contribution to the global N2O budget. Incubation experiments with nitrogen stable isotope tracer were used to investigate the geochemical factors controlling N2O production from denitrification in the Chesapeake Bay, the largest estuary in North America. The highest potential rates of water column N2O production via denitrification (7.5±1.2 nmol-N L−1 h−1) were detected during summer anoxia, during which oxidized nitrogen species (nitrate and nitrite) were absent from the water column. At the top of the anoxic layer, N2O production from denitrification was stimulated by addition of nitrate and nitrite. The relative contribution of nitrate and nitrite to N2O production was positively correlated with the ratio of nitrate to nitrite concentrations. Increased oxygen availability, up to 7 µmol L−1 oxygen, inhibited both N2O production and the reduction of nitrate to nitrite. In spring, high oxygen and low abundance of denitrifying microbes resulted in undetectable N2O production from denitrification. Thus, decreasing the nitrogen input into the Chesapeake Bay has two potential impacts on the N2O production: a lower availability of nitrogen substrates may mitigate short-term N2O emissions during summer anoxia; and, in the long-run (timescale of years), eutrophication will be alleviated and subsequent reoxygenation of the bay will further inhibit N2O production.

scholarly journals Spatial and temporal variability of nitrous oxide emissions in a mixed farming landscape of Denmark

2012 ◽  
Vol 9 (8) ◽  
pp. 2989-3002 ◽  
Author(s):  
K. Schelde ◽  
P. Cellier ◽  
T. Bertolini ◽  
T. Dalgaard ◽  
T. Weidinger ◽  
...  
Keyword(s):  
Land Use ◽  
Nitrous Oxide ◽  
Agricultural Land ◽  
Nitrous Oxide Emissions ◽  
Soil Conditions ◽  
Spatial And Temporal Variability ◽  
N2o Emissions ◽  
N2o Production ◽  
Mixed Farming ◽  
N2o Fluxes

Abstract. Nitrous oxide (N2O) emissions from agricultural land are variable at the landscape scale due to variability in land use, management, soil type, and topography. A field experiment was carried out in a typical mixed farming landscape in Denmark, to investigate the main drivers of variations in N2O emissions, measured using static chambers. Measurements were made over a period of 20 months, and sampling was intensified during two weeks in spring 2009 when chambers were installed at ten locations or fields to cover different crops and topography and slurry was applied to three of the fields. N2O emissions during spring 2009 were relatively low, with maximum values below 20 ng N m−2 s−1. This applied to all land use types including winter grain crops, grasslands, meadows, and wetlands. Slurry application to wheat fields resulted in short-lived two-fold increases in emissions. The moderate N2O fluxes and their moderate response to slurry application were attributed to dry soil conditions due to the absence of rain during the four previous weeks. Cumulative annual emissions from two arable fields that were both fertilized with mineral fertilizer and manure were large (17 kg N2O-N ha−1 yr−1 and 5.5 kg N2O-N ha−1 yr−1) during the previous year when soil water conditions were favourable for N2O production during the first month following fertilizer application. Our findings confirm the importance of weather conditions as well as nitrogen management on N2O fluxes.

scholarly journals Trace gas fluxes of CO<sub>2</sub>, CH<sub>4</sub> and N<sub>2</sub>O in a permanent grassland soil exposed to elevated CO<sub>2</sub> in the Giessen FACE study

2011 ◽  
Vol 11 (17) ◽  
pp. 9333-9342 ◽  
Author(s):  
M. Kaleem Abbasi ◽  
C. Müller
Keyword(s):  
Elevated Co2 ◽  
15N Tracer ◽  
Organic N ◽  
N2o Emissions ◽  
Ch4 Oxidation ◽  
N2o Production ◽  
N Application ◽  
Oxidation Rates ◽  
Controlled Conditions ◽  
N2o Fluxes

Abstract. Long-term field observations showed that N2O fluxes observed shortly after N application were not significantly affected by elevated CO2 in the Giessen Free Air Carbon dioxide Enrichment (FACE) study. To further investigate this unexpected result a 15N tracer study was carried out under controlled conditions where in parallel treatments either the NH4+ pool (15NH4NO3) or the NO3− pool (NH415NO3) was enriched with 15N. Fluxes of CO2, CH4, and N2O as well as the 15N enrichment of the N2O were measured. Denitrifying Enzyme Activity (DEA), total denitrification (N2 + N2O) and N2-to-N2O ratios were quantified in separate experiments. Over the 57 day incubation, N2O fluxes averaged 0.090 ng N2O-N g−1 h−1 under ambient and 0.083 ng N2O-N g−1 h−1 under elevated CO2 (not significantly different). The N2O production processes were identified by a two-source model. Results showed that N2O must have also been produced by a third source – possibly related to organic N transformation – which was stimulated by elevated CO2. Soil CO2 fluxes were approximately 20 % higher under elevated CO2 than soil from ambient but the differences were not significant. CH4 oxidation rates were on average −1.75 ng CH4-C g−1 h−1 in the elevated and −1.17 ng CH4-C g−1 h−1 in the ambient indicating that elevated CO2 increased the CH4 oxidation by 49 % compared to ambient CO2 under controlled conditions. N fertilization increased CH4 oxidation by 3-fold in both CO2 treatments. CO2 did not have any significant effect on DEA while total denitrification and N2-to-N2O ratios increased by 36 and 33 %, respectively. The results indicate that shortly after N application elevated CO2 must have stimulated both the N2O production and reduction to N2 to explain the increased N2-to-N2O ratio and at the same time explain the non-responsiveness of the N2O emissions. Thus, the observed variation of the CO2 effect on N2O emissions throughout the year is possibly governed by the dynamics of the N2O reductase activity.

scholarly journals Soil Denitrifier Community Size Changes with Land Use Change to Perennial Bioenergy Cropping Systems

2016 ◽  
Author(s):  
Karen A. Thompson ◽  
Bill Deen ◽  
Kari E. Dunfield
Keyword(s):  
Land Use ◽  
16S Rrna ◽  
Land Use Change ◽  
Crop Production ◽  
Large Scale ◽  
Perennial Grasses ◽  
N2o Emissions ◽  
Research Station ◽  
N2o Production ◽  
Nirs Gene

Abstract. Dedicated biomass crops are required for future bioenergy production. However, the effects of large-scale land use change (LUC) from traditional annual crops, such as corn-soybean rotations to the perennial grasses (PGs) switchgrass and miscanthus on soil microbial community functioning is largely unknown. Specifically, ecologically significant denitrifying communities, which regulate N2O production and consumption in soils, may respond differently to LUC due to differences in carbon (C) and nitrogen (N) inputs between crop types and management systems. Our objective was to quantify bacterial denitrifying gene abundances as influenced by corn-soybean crop production compared to PG biomass production. A field trial was established in 2008 at the Elora Research Station in Ontario, Canada (n = 30), with miscanthus and switchgrass grown alongside corn-soybean rotations at different N rates (0 and 160 kg N ha-1) and biomass harvest dates within PG plots. Soil was collected on four dates from 2011–2012 and quantitative PCR was used to enumerate the total bacterial community (16S rRNA), and communities of bacterial denitrifiers by targeting nitrite reductase (nirS) and N2O reductase (nosZ) genes. Miscanthus produced significantly larger yields and supported larger nosZ denitrifying communities than corn-soybean rotations regardless of management, indicating large-scale LUC from corn-soybean to miscanthus may be suitable in variable Ontario conditions while potentially mitigating soil N2O emissions. Harvesting switchgrass in the spring decreased yields in N-fertilized plots, but did not affect gene abundances. Standing miscanthus overwinter resulted in higher 16S rRNA and nirS gene copies than in fall-harvested crops. However, the size of the total (16S rRA) and denitrifying communities changed differently over time and in response to LUC, indicating varying controls on these communities.

scholarly journals Combating the illegal transplantation as a prerequisite for the sustainable development of regions (on the example of Sverdlovsk region)

2021 ◽  
Vol 94 ◽  
pp. 01018
Author(s):  
Margarita Khomyakova ◽  
Dmitry Bagretsov
Keyword(s):  
Sustainable Development ◽  
Successful Operation ◽  
Human Organ ◽  
The Sustainable Development ◽  
Human Organs ◽  
Legal Literacy ◽  
History Of ◽  
Regional Authorities ◽  
Tissue Transplant ◽  
Made In

The text of this article emphasizes that the history of transplantation as an independent medical industry originated in the Union of Soviet Socialist Republics, the first successful operation to transplant human organs and tissues was performed there by the surgeon Yuri Voronoy. Today Russia is one of the world-leading powers where human organ and tissue transplant operations are performed. Among all the subjects of Russia where transplant operations are carried out, Sverdlovsk region occupies a special place: doctors in this region conduct successful operations on organ and tissue transplantation and make discoveries that are significant for Russian transplantology. The study of Russian laws and regulations regulating relations in the field of transplantology conducted by authors, as well as an analysis of the scientific literature showed that relations in the field of transplantology are not fully regulated by Russian legislation, including criminal law. On the territory of Sverdlovsk region in particular, as well as on the territory of Sverdlovsk region as a whole, it is possible, for example, to carry out transactions for the sale and purchase of human organs and tissues with impunity, if such transactions are not related to causing harm to the life and health of the victim. These deals are illegal, but not punishable. As the analysis of the practice carried out in the framework of this study has shown, the inhabitants of Sverdlovsk region suffered from the imperfection of the norms of Russian legislation regulating relations in the field of transplantology. While the residents of Sverdlovsk region are suffering from illegal transplantation, one cannot speak of the sustainable development of this region. The authors of the study, in order to combat illegal transplantation in Sverdlovsk region, propose that the regional authorities strengthen measures to improve the general legal literacy of the population, introduce a register of citizens' opinions on the posthumous transplantation of their organs and tissues, and introduce mandatory registration of transactions made in Sverdlovsk region, a subject of which are human organs and tissues.

scholarly journals Mineral Nutrition of Abaca (Musa textilis Née) Planted under Coconut and Rainforestation Production Systems

2016 ◽  
pp. 36-52
Author(s):  
Marlito Bande ◽  
Victor Asio ◽  
Joachim Sauerborn ◽  
Volker Römheld
Keyword(s):  
Nutrient Uptake ◽  
Production Systems ◽  
Soil Depth ◽  
Management Practice ◽  
Plant Part ◽  
Nutrient Deficiencies ◽  
History Of ◽  
Standard Values ◽  
Dead Plant ◽  
High Degree

The allocation of nutrients within the abaca plant is of interest, as it determines the amounts which may be removed from the farm, returned to the soil in dead plant part, and available for re-translocation to subsequent generations of suckers. Hence, the study was conducted to investigate the level of nutrition among abaca plants grown under diversified multi-strata agroecosystems and to understand the pattern of abaca nutrient uptake planted under coconut and Rainforestation production systems. The allocation of nutrients within the abaca plant is of interest, as it determines the amounts which may be removed from the farm, returned to the soil in dead plant part, and available for re-translocation to subsequent generations of suckers. Hence, the study was conducted to investigate the level of nutrition among abaca plants grown under diversified multi-strata agroecosystems and to understand the pattern of abaca nutrient uptake planted under coconut and Rainforestation production systems. In the abaca–coconut agroecosystem, results show that availability of macronutrients from different blocks demonstrates a high degree of significant differences (p≤0.01) within 0-30cm soil depth. These differences can be attributed to the history of land uses, farmer’s management practice and soil the type. On the other hand, it can be concluded that the trees planted under the Rainforestation system plays a significant role in the nutrient fluxes and the improvement of soil acidity. This is due to the fact that trees function as “nutrient-pumps”. Therefore, integrating abaca under the Rainforestation system is a best option. Finally, it is not enough and safe to conclude that the low nutrient concentration in abaca leaves is due to low nutrient in the soil concentration solution since the standard values for abaca is still unknown. Thus, using the results for diagnosing nutrient deficiencies is insufficient.

Introduction: Global Governance through Goal Setting

2017 ◽  
Author(s):  
Norichika Kanie ◽  
Steven Bernstein ◽  
Frank Biermann ◽  
Peter M. Haas
Keyword(s):  
Sustainable Development ◽  
Goal Setting ◽  
Global Governance ◽  
Research Agenda ◽  
Sustainable Development Goals ◽  
The Sustainable Development ◽  
Unique Nature ◽  
History Of ◽  
Development Goals ◽  
Governance Strategy

This chapter lays out a research agenda to assess conditions, challenges, and prospects for the Sustainable Development Goals to pursue this aim. First, the chapter discusses goal setting as a global governance strategy. Second, to contextualize the Sustainable Development Goals, it discusses the unique nature of the modern challenges that the Sustainable Development Goals must confront and review the historical and political trajectory of sustainable development governance, including the evolution from a primarily rule-based to a more goal-based system and the experience of the earlier Millennium Development Goals. Third, the chapter reviews the negotiating history of the Sustainable Development Goals. Then, the chapter elaborate on how the chapters are organized to address the three questions that guide the book.

Conditions for Development of Renewable Energy in Poland

2016 ◽  
pp. 310-339
Author(s):  
Katarzyna Osiecka-Brzeska
Keyword(s):  
Sustainable Development ◽  
Renewable Energy ◽  
Renewable Resources ◽  
The Sustainable Development ◽  
Development Indicators ◽  
Sustainable Development Indicators ◽  
Sustainable Policy ◽  
History Of ◽  
Provinces Of Poland ◽  
Definition Of

The Paper examines legal and financial tools which are used in Poland to succor the development of energy from renewable resources. In the first part a definition of sustainable development is given and the short history of this idea is shown. Then the concept of Sustainable energy is introduced. The second part describes main policies of European Union on sustainable policy and the Polish Legal System on Renewable Energy is described. The fifth part of the paper analyzes the sustainable development indicators provided by Eurostat for the energy produced from renewable resources. there are 6 indicators analyzed. In the end the forecasts for the development of RES in Poland is given. There are clues for development of different technologies in different provinces of Poland. There are also forecasts for the development of the renewable energy market in Poland.

scholarly journals Tourism Policy of Nepal and Sustainable Mountain Tourism Development in Retrospect

2019 ◽  
Vol 10 (1) ◽  
pp. 37-50 ◽  
Author(s):  
Prakash Upadhyay
Keyword(s):  
Tourism Development ◽  
Secondary Data ◽  
Integrated Approach ◽  
Local Participation ◽  
The Sustainable Development ◽  
Retrospective Assessment ◽  
Nature And Culture ◽  
Tourism Sector ◽  
History Of ◽  
Tourism Policy

The modern history of tourism in Nepal began with mountain tourism embodying the diversity of nature and culture, diversity, marginality, access difficulty, fragility, niche and aesthetics. Despite huge scope, Nepal has been unable to take full benefits of mountains, due to inadequate policies and fragile implementation. Pedestaled on secondary data, the key objective of this paper is to make a retrospective assessment of tourism policy and sustainable mountain tourism development efforts in Nepal. The sustainable development of mountain tourism relies on the government’s plans and policies and the efficient coordination between stakeholders. But the tourism policies have not been able to adequately address mountain tourism, and this has led to unbalanced growth of tourism sector. Despite the implementation of new Tourism Policy in 2008, adequate focus on mountain tourism is still missing. There is a lacuna of adequate driving force in tourism policy and it has failed to address vital areas of mountain tourism. Hence, there is an instant need of specific and separate mountain tourism policy encompassing integrated approach (abiding federal structure and local participation in planning and management) hence making mountain tourism sustainable, responsible and sensitive--ecologically and culturally.

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