ISHS Acta Horticulturae 215: Seed Research in Horticulture
INFLUENCE OF PEG SEEDTREATMENTS ON EMERGENCE UNDER STRESS CONDITIONS |
| Authors: | T. Muhyaddin, H.-J. Wiebe |
| Abstract:
The objectives of this study were to determine the effect of PEG seedtreatments on emergence in soils with high salinity. Seeds of carrots and tomatoes were pretreated with an aerated PEG 4000 solution of -12 bars for 11 resp. 8 days at 14 resp. 16°C. During treatment the embryos of carrots increased in size, which was not measureable in tomato seeds. The seeds were sown in boxes filled with loamy sand containing different levels of salt (0 to 8 g NaCl + Mg SO4 per kg soil) and the emergence was tested in growth rooms at 16 resp. 18°C. The result was an earlier and higher percentage of emergence of PEG treated seeds compared with untreated seeds. The relatively highest effect of seedtreatment was found under conditions with increasing salinity as a result of decreasing soil water content. Outdoor experiments with increasing N-fertilizer applications before sowing showed comparable results. | |
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