نتایج جستجو برای: salinity management

تعداد نتایج: 875108  

2005
Lena Bergström

The brackish Baltic Sea is a marginal environment for both marine and freshwater species. The rate of ecological differentiation is presumably high due to strong selection pressure from a gradient of decreasing salinity that has been present in its current state for only about 3 000 years. Even more recently, increased nutrient loading due to human activities has affected the growth rate of spe...

Journal: :Environmental pollution 2013
Miguel Cañedo-Argüelles Ben J Kefford Christophe Piscart Narcís Prat Ralf B Schäfer Claus-Jürgen Schulz

Secondary salinisation of rivers and streams is a global and growing threat that might be amplified by climate change. It can have many different causes, like irrigation, mining activity or the use of salts as de-icing agents for roads. Freshwater organisms only tolerate certain ranges of water salinity. Therefore secondary salinisation has an impact at the individual, population, community and...

Journal: :International journal of environmental research and public health 2016
Hsin-I Hsiao Man-Ser Jan Hui-Ju Chi

This study aimed to investigate and quantify the relationship between climate variation and incidence of Vibrio parahaemolyticus in Taiwan. Specifically, seasonal autoregressive integrated moving average (ARIMA) models (including autoregression, seasonality, and a lag-time effect) were employed to predict the role of climatic factors (including temperature, rainfall, relative humidity, ocean te...

پایان نامه :دانشگاه رازی - کرمانشاه - دانشکده ادبیات و علوم انسانی 1393

in recent years, there has been a growing interest among researchers to investigate the relationship betweenteacher self-efficacy and classroom behavior management, especially students misbehavior. therefore, this study aimed to comparatively investigate english and arabic teachers’ use of different behavior managementstrategies, their self-efficacy, and their success in an iranian context. th...

Journal: :پژوهش های خاک 0
ملیحه کرمی کارشناسی ارشد آبیاری و زهکشی، دانشگاه شهید چمران معصومه فراستی استادیار گروه مهندسی آب، دانشکده کشاورزی، دانشگاه رازی کرمانشاه رامین ملکی کارشناسی ارشد آبیاری و زهکشی، دانشکده کشاورزی، دانشگاه رازی کرمانشاه

proper management of saline soils needs adequate information about the amount and salt distribution in the root zone. irrigation is one of the factors that control the distribution of salt. this study investigated soil leaching simulation by using hydrus2d software based on the evaporation of soil surface of a land without plant located at shahid chamran university, ahwaz, iran. samples were ta...

2017
S. Negrão S. M. Schmöckel M. Tester

BACKGROUND Because soil salinity is a major abiotic constraint affecting crop yield, much research has been conducted to develop plants with improved salinity tolerance. Salinity stress impacts many aspects of a plant's physiology, making it difficult to study in toto Instead, it is more tractable to dissect the plant's response into traits that are hypothesized to be involved in the overall to...

2014
Lyuben Zagorchev Plamena Kamenova Mariela Odjakova

Contemporary agriculture is facing new challenges with the increasing population and demand for food on Earth and the decrease in crop productivity due to abiotic stresses such as water deficit, high salinity, and extreme fluctuations of temperatures. The knowledge of plant stress responses, though widely extended in recent years, is still unable to provide efficient strategies for improvement ...

Journal: :Revista de biologia tropical 2010
Taofikat Adesalu Micheal Bagbe Dare Keyede

As in other countries, the effects of human stressors on coastal areas and waters in Nigeria are increasing, and management strategies are urgent. In order to assess this, studies on phytoplankton composition in relation to physico-chemical characteristic of two tidal creeks in Lagos were conducted for six months (October 2007 to March 2008). Variations in some of the physical and chemical para...

Journal: :Journal of environmental biology 2011
Sangeeta Yadav Mohd Irfan Aqil Ahmad Shamsul Hayat

Salinity in agricultutal terms is the excess of salts above the level plant require. Most often it poses constrains in the growth hence productivity of the category of plants called glycophytes, wherein falls major crops, therefore is a serious concern. It is often recognized as excess of sodium ions (sodicity) that imparts life threatening consequences in plant due to mal-textured soil hindere...

2002
Dennis McIntosh Kevin Fitzsimmons

Coastal aquaculture can contribute to eutrophication of receiving waters. New technologies and improved management practices allow the aquaculture industry to be more sustainable and economically viable. Current practices, however, do not provide an additional use for effluent water. Nitrogen, phosphorus and other effluent compounds could be valuable plant nutrients. Inflow and effluent water f...

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