نتایج جستجو برای: water salinity

تعداد نتایج: 566020  

2005
Christy T. Carter Catherine M. Grieve James A. Poss Donald L. Suarez

The reuse of saline wastewaters and groundwaters becomes a viable option for the irrigation of salt tolerant floral crops as competition for high quality water increases. A completely randomized design with three replications was used to assess the effects of two water ionic compositions and six salinity levels on the production and mineral accumulation of two cultivars of Celosia argentea var....

2008
Melissa Schlegel

rise of groundwater levels in unconfined aquifers can cause dryland salinity to increase by several processes including; dissolution of windblown halite, and incorporation of saline clay pore water. The primary process of increased groundwater salinity is evaporation of shallow groundwater as it rises to within a few meters of the ground surface. in murray Basin, australia, the effect of drylan...

2003

San Francisco Bay is one of the most important estuaries on the west coast of the Americas. Its water quality is controlled primarily by strearnflow from the Sacramento and San Joaquin rivers. In fact, freshwater inflow from the Sacramento-San Joaquin Delta explains 86% of the salinity variability at the mouth of the San Francisco Bay estuary [klerson et al., 19891. The massive diversion of str...

2002

In a series of studies conducted in Malawi to determine the effects of different salinity concentrations on survival, growth, feed conversion, reproduction, and whole-body composition of five taxonomic groups of tilapia—Oreochromis shiranus chilwae (Lake Chilwa strain), O. shiranus chilwae (Bunda College strain), O. karongae, O. shiranus shiranus, and Tilapia rendalli—it was observed that the f...

2000
Peter S. Kelly Kamazima M. M. Lwiza Robert K. Cowen Gustavo J. Goni

A vertical array of conductivity-temperature recorders moored off the west coast of Barbados, West Indies, from May 1996 to November 1997 revealed a heterogeneous and variable salinity pattern punctuated by five pools of low-salinity water (<34.5 practical salinity units (psu)) entering the region. A typical pool extended to 30-m depth and lasted ~25 days, although one pool extended to 47 m and...

Journal: :علوم باغبانی 0
معصومه عباسی عبدالرسول ذاکرین مختار حیدری

abstract mango is one of the most important tropical fruits in iran and salinity is an important problem to mango production in ‘hormozgan’ province and other mango growing areas in iran. at present experiment the effects of saline irrigation water of different sodium chloride concentration on vegetative growth and ion content of mango was evaluated. treatments comprised two type of cultivars (...

Journal: :journal of health sciences and surveillance system 0
marziyeh ansari shiri department of environmental health engineering, school of health, student research committee, shiraz university of medical sciences, shiraz, iran; mansooreh dehghani research center for health sciences, department of environmental health, school of health, shiraz university of medical sciences, shiraz, iran mohammad reza samaei research center for health sciences, department of environmental health, school of health, shiraz university of medical sciences, shiraz, iran

background: atrazine is a widely used herbicide. the increasing salinity of many water resources has had a negative effect on atrazine biodegradation. the aim of this study was to isolate atrazine degrading bacteria in semi-salinity media.   methods: nine selected bacterial species were cultivated on the mineral salt broth culture medium containing atrazine (50, 100, 500 mg/l), nacl concentrati...

2004
Y. L. Qian

tolerant cultivars showing less growth reduction than sensitive cultivars under saline conditions (Qian et al., We evaluated leaf C isotope discrimination as affected by salinity 2001; Suplick-Ploense et al., 2002). Growth reduction among three Kentucky bluegrass (Poa pratensis L.) cultivars that differ in their salt tolerance. ‘Moonlight’, ‘NorthStar’, and ‘P-105’ under salt stress could be at...

Journal: :Journal of environmental management 2012
Fernando Visconti José Miguel de Paz María José Molina Juan Sánchez

SALTIRSOIL (SALTs in IRrigated SOILs) is a model for the medium to long term simulation of soil salinity in irrigated, well-drained lands. Once the algorithms were verified, the objective of our study was to validate SALTIRSOIL under one of several water quality and management scenarios in Mediterranean agriculture. Because drip and surface are the most common irrigation systems in irrigated ag...

2013
S. Abd. Hamid S. K. Lee J. Dayou R. Yusoff

The mixture between two fluids of different salinity has been proven to capable of producing electricity in an ocean salinity energy conversion system known as hydrocratic generator. The system relies on the difference between the salinity of the incoming fresh water and the surrounding sea water in the generator. In this investigation, additional parameter is introduced which is the temperatur...

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