نتایج جستجو برای: salt affected soils

تعداد نتایج: 408933  

Abouzar Emadi Arash Azarpanah Korosh Ordookhani Mahdi Zare,

Objective: Soil salinity is one of the major worldwide environmental constraints affecting agricultural production in arid and semiarid regions. Lack of proper management of water and soil resources lead to increase soil salinity and reduce soil fertility. On the other hand, it seems simple and cheap method of measuring soil salinity is necessary. The aim of this study was to determine the rela...

2014
Madhavi L. Kakumanu Mark A. Williams

Sodium chloride and other osmotically active molecules are often applied to microbial cultures or soils to describe microbial responses and adaptation to desiccation in soils. However, salts and other osmolytes may have different effects on microorganisms than matric deficits caused by soil drying. It was thus hypothesized that low matric and osmotic potentials would have different effects on s...

2004
H. Ghadiri J. Hussein E. Dordipour C. Rose

There is an abundance of literature on many aspects of soil salinity and sodicity, and the impact of increased salt and sodium on properties, behaviour, management and productivity of soils. However the impact of sodicity on erosion and soil erodibility and sediment transport has received less attention. The aim of this study was to investigate the effects of changing soil salinity and sodicity...

2007
W. W. Wallender K. K. Tanji J. M. Lord C. V. Moore R. R. Robinson E. C. Stegman

The principles of irrigation and drainage in cracking soils differ markedly from non-cracking soils, and are not thoroughly understood. This paper presents a conceptual model to simulate water and salt flows in cracking soils of the Imperial Valley, CA, in the presence of ground water that contributes partially to ET demand of crops. A salt reactivity function is introduced in the model to acco...

2017
Minghai Hong Wenzhi Zeng Tao Ma Guoqing Lei Yuanyuan Zha Yuanhao Fang Jingwei Wu Jiesheng Huang

Crop coefficients (Kc) are important for the development of irrigation schedules, but few studies on Kc focus on saline soils. To propose the growth-stage-specific Kc values for sunflowers in saline soils, a two-year micro-plot experiment was conducted in Yichang Experimental Station, Hetao Irrigation District. Four salinity levels including non-salinized (ECe = 3.4–4.1 dS·m–1), low (ECe = 5.5–...

Journal: :Plant physiology 2007
Laura de Lorenzo Francisco Merchan Sandrine Blanchet Manuel Megías Florian Frugier Martin Crespi Carolina Sousa

Soil salinity is one of the most significant abiotic stresses for crop plants, including legumes. These plants can establish root symbioses with nitrogen-fixing soil bacteria and are able to grow in nitrogen-poor soils. Medicago truncatula varieties show diverse adaptive responses to environmental conditions, such as saline soils. We have compared the differential root growth of two genotypes o...

2017
Shutao Wang Qian Feng Yapeng Zhou Xiaoxi Mao Yaheng Chen Hao Xu

Soil salinization is a global problem that limits agricultural development and impacts human life. This study aimed to understand the dynamic changes in water and salinity in saline-alkali soil based on an indoor soil column simulation. We studied the changes in the water and salt contents of soils with different degrees of salinization under various irrigation conditions. The results showed th...

2017
Agata Bartkowiak Joanna Lemanowicz Piotr Hulisz

This paper aimed to evaluate the ecological risk posed by the accumulation of heavy metals in the salt-affected soils of the habitat covered by the EU Natura 2000 program in relation to the activity of soil redox enzymes. The research was carried out in the halophyte reserve in Ciechocinek (north-central Poland) which is a very specific habitat as it undergoes a long-term human impact related t...

2005
Jose Pardo

Salinisation is the accumulation of water-soluble salts in the soil solum or regolith to a level that impacts on agricultural production, environmental health and economic welfare. Salt-affected soils occur in more than a hundred countries of the world with a variety of extents, nature and properties. No climatic zone in the world is free from salinisation, although the general perception is fo...

Journal: :Environmental science & technology 2016
Sujay S Kaushal

O decades, there has been increased salinization of fresh water in many regions of the world. Salinization was previously thought to be an environmental problem restricted primarily to arid regions. However, it is now recognized as a global environmental concern impacting humid regions due to human inputs from road deicers, sewage inputs, and water softeners (Figure 1). In both arid and humid r...

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