Drip irrigation of cotton with saline-sodic water

et al. 2015

Scientia Horticulturae

a b s t r a c tDrip-irrigation with saline water was used for reclamation of very heavy coastal saline soils and its effects on salt-sensitive plants were also evaluated in a three-year trial in the coastal region of east China. The original soil salinity expressed as electrical conductivity of the saturation paste extract (EC e ) was an average of 27.13 dS/m in the 0-100 cm depth. The experiment included five treatments of salinity levels of 0.8, 3.1, 4.7, 6.3 and 7.8 dS/m of irrigation water. Chinese rose (Rosa chinensis), a salt-sensitive species, were planted in the sandy loam soil to determine the effect of saline environment on growth characters and dry matter production. Drip-irrigation had a significant positive impact on salt leaching, and the very highly saline soil became mildly saline after reclamation in root zone of soil profiles irrigated with water of salinity up to 7.8 dS/m. An increase in salinity of irrigation water had adverse effects on plant height, stem diameter, survival rate and dry matter production. Root:shoot ratio increased with increasing water salinity. The values of soil-salt tolerance threshold were 2.39 dS/m at emergence and 2.78 dS/m in the growth period after emergence. The emergence rate and dry mass decreased by 27.39 and 41.19% for each unit of EC e increase in the root zone, respectively. These results implied that drip-irrigation with saline water by controlling soil matric potential under a gravel-sand layer was effective in reclamation of this very heavy coastal saline soil for sensitive species such as Chinese rose.

Section: Growth and Dry Mass Of Chinese Rosementioning

confidence: 59%

Section: Growth and Dry Mass Of Chinese Rosementioning

confidence: 99%

Effect of drip-irrigation with saline water on Chinese rose (Rosa chinensis) during reclamation of very heavy coastal saline soil in a field trial

et al. 2015

Scientia Horticulturae

“…3). In all, plant growth were significantly affected by salinity, which has also been confirmed in crops and other plants (Chauhan et al 2008;Karlberg et al 2007;Malash et al 2008;Mantell et al 1985;Oster and Schroer 1979;Rhoades 1977;Rhoades et al 1988;Sonneveld et al 1999;Valdez-Aguilar et al 2011). …”

Section: Growth and Dry Massmentioning

confidence: 59%

A vegetation reconstruction method to plant Sedum spectabile Boreau using drip-irrigation with saline water on a coastal saline soil in region around Bohai Gulf

et al. 2015

Paddy Water Environ

Soil salinity and saline groundwater are major constraints to the cultivation of crops and landscape plants in coastal regions. With the rapid industrialization and urbanization in these areas, there is an urgent need to improve the landscape to meet the increasing demand of living environments for cities and districts. The aim of this study was to propose a method to plant Sedum spectabile Boreau, a common landscape flower plant, on a very heavy coastal saline soil using drip-irrigation with saline water in region around Bohai Gulf. The salinity levels of irrigation water were 0.8, 3.1, 4.7, 6.3a, nd 7.8 dS/m, respectively. The results showed that the revegetation method, which mainly included 'ridge planting ? saline water drip-irrigation', was effective in planting Sedum spectabile Boreau for reclaiming coastal saline silt soil. An soil matric potential (SMP) higher above -5 kPa after transplanted and -10 kPa after growing season ended, and 6 mm of irrigation water can be used as indicators for Sedum spectabile Boreau drip-irrigation scheduling with 100 % survival rate when irrigated with saline water at \7.8 dS/m in initially saline soils with a gravel-sand layer after tillage. This method is combined with comprehensive utilization of the saline water, agronomic measures, collaborative repair of the soil and plants to offer new views and theoretical support for the protection and development of saline land in coastal regions.

“…Many studies reported that plant growth and dry weight could be significantly affected by salinity, which has been confirmed in crops and other plants (Chauhan et al, 2008;Karlberg et al, 2007;Mantell et al, 1985;Oster and Schroer 1979;Rhoades, 1977). In the present study, the survival rates of S. novi-belgii were >90% at EC iw < 7.8 dS/m in 2014 and 2015, respectively.…”

Section: Survival Rate and Shoot Dry Massmentioning

confidence: 83%

“…Shoot dry weights significantly decreased with irrigation water salinity increasing, likely due to decreased plant growth and changes in physiology caused by irrigation with saline water. It has been reported that water uptake (Mantell et al, 1985;Rogers, 2001;Romero-Aranda et al, 2001), stomatal density (Prior et al, 1992), transpiration (Romero-Aranda et al, 2001;Valdez-Aguilar et al, 2011), net CO 2 assimilation and leaf photosynthesis (Prior et al, 1992) are reduced as irrigation water salinity increases. Dry matter production also declined due to decreased light interception from the reduction in leaf area (Alarcon et al, 1994;Kutuk et al, 2004).…”

Section: Survival Rate and Shoot Dry Massmentioning

confidence: 99%

Response of Symphyotrichum novi-belgii and Dianthus chinensis L. to saline water irrigation in a coastal saline soil

et al. 2016

Scientia Horticulturae

a b s t r a c tSymphyotrichum novi-belgii and Dianthus chinensis L. perform well in landscape. However, their tolerance to salinity stress is unknown. Field experiment was conducted to evaluate the salt tolerance threshold (STI) of these two herbaceous plants cultivated in a coastal saline soil by drip-irrigation with saline water at electrical conductivity (EC) of 0.8, 3.1, 4.7, 6.3, and 7.8 dS/m for three years. The original soil salinity expressed as electrical conductivity of the saturation paste extract (EC e ) was an average of 27.64 dS/m in the 0-95 cm depth. Our results showed that drip-irrigation was effective in salt leaching. After 18 months, the average values of soil EC e for five treatments were 2.32 and 2.78 dS/m in 0-35 and 0-95 cm soil profile, respectively. The survival rates were >94% and >80% when irrigated with saline water at <7.8 dS/m for S. novi-belgii and D. chinensis L., respectively. The survival rate and shoot dry mass decreased by 0.76% and 9.24% for each unit of EC increase in the irrigation water for S. novi-belgii, and the corresponding values were 3.01% and 8.21% for D. chinensis L. This study implied that S. novi-belgii and D. chinensis L. are suitable plants in landscape construction of coastal saline soils using drip-irrigation with suitable saline water range.