Effects of irrigation water with high concentrations of Na and HCO3 on yellowing of leaves and on yield of strawberry in bench culture
2009
Mizukami, K.(Fukuoka-ken. Agricultural Research Center, Chikushino (Japan)) | Odahara, K. | Kaneko, A.
Strawberry plants were grown with irrigation water that contained 100mg/l of Na and 200mg/l of HCO3 in bench culture with 1.4 to 1.7 l compost per stock. Under these conditions, yellowing of young leaves and browning of old leaf margins occurred from the middle of January. The yellowing of young leaves was judged to be attributable to a situation where an Mn deficiency symptom had resulted from an absorption restraint of Mn by antagonism of excessive absorption of Na and insolubilization of Mn with a rise in pH of the compost, which in turn had been brought about by a high concentration of HCO3. Mn content in leaves decreased remarkably when such irrigation water was used even if young leaves did not show the yellowing symptom. The decrease in yield from March to May and in total yield is considered to be a result of Mn deficiency restraining fruit enlargement. When Na concentration of irrigation water is lower than 50mg/l, the water may be suitable for strawberry 'AMAOU' production with bench culture.
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