ISSN:
1573-5036
Keywords:
Beans
;
Leaf extension rate
;
Salt tolerance
;
Soil water osmotic potential
;
Transpiration rate
Source:
Springer Online Journal Archives 1860-2000
Topics:
Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
Notes:
Summary Bean plants (Kora cv) were grown in potted soil artificially salinized by adding NaCl and CaCl2 to the irrigation water to obtain an electrical conductivity of the soil saturation extract (ECe) thirty days after emergence of 0.1, 0.3, 0.5 and 0.7 S/m at 25°C and a sodium adsorption ratio (SAR) of 4 (mmol/l)2. Thereafter, plants were irrigated when soil water matric potential (ΨM) was in the range of −20 to −30 kPa (wet treatment) and when ΨM was in the range of −40 to −60 kPa (dry treatment). Transpiration rates (Tr) and leaf extension rates (LER) per plant or per unit of leaf area were decreased by increasing soil salinity and by decreasing soil moisture. However, a given decrement of ΨM produced a considerable larger decrement in Tr of LER than an equivalent decrement of soil water osmotic potential (Ψ0). Absolute yields of green pods under wet treatments were from twice to one and a half time as large under the wet than under the dry treatment at equivalent values of Ψ0. Relative yields were reduced by 25% when ECe were about 0.5 S/m and 0.7 S/m in the dry and wet treatment respectively. Salt tolerance data of crops may not have a quantitative interest when soil irrigation regimes under which they were obtained are not specified.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF02197947
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