EFFECTS OF HYDROPHILIC POLYMERS, VAPOR GARD AND GLYCINE BETAINE ON GROWTH, FLOWERING AND WATER USE EFFICIENCY IN GLADIOLUS PLANTS CV "WHITE PROSPERITY" GROWING IN SANDY SOIL UNDER DIFFERENT WATER REGIMES | ||
| Journal of Plant Production | ||
| Article 27, Volume 27, Issue 4, April 2002, Pages 2489-2505 PDF (5.99 M) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/jpp.2002.254142 | ||
| Author | ||
| F. A. Attia, | ||
| Horticulture Dept. Fac, Agric., Minia Univ. | ||
| Abstract | ||
| Two pot experiments were conducted to investigate the effects of the hydrophylic polymer "hydrosource" (HP) 1% as soil application, vapor gard (VG) 3% as foliar spray, glycinebetaine (G8) 1.5% as foliar spray, HP+VG, HP+G8 in addition to the untreated control plants on Gladiolus plants cultivar "White Prosperity' growing in sandy soil under different irrigation regimes (100%, 80%, 60% and 40% of water holding capacity, WHC). Growth, flowering character, corm and cormels production, water use efficiency were investigated. Results revealed that flowering was delayed as soil moisture level decreased up to 40% (WHC). In addition, plant growth under severe water stress (60-40% WHC), dry weight of leaves, flowering spike Jength and weight, flowering spike diameter, number and weight of florates, corm and cormels weight and water use efficiency were significantly decreased. Using the HP, VG and G8 as individual treatments or in combination improved the vegetative growth, flowering and corm production. The interaction between water supply treatments and polymer, VG and GB showed almost significant effects on the variables studied. These treatments tended to overcome the harmful effects of water stress and reserved plant growth particularly at low water regimes (60-40% WHC). The best treatment was recorded at HP+VG or HP+GB combined treatments at 60% water supply which gave the best growth at low water supply thus reduces the amount of water required in irrigation as a sequence of improving the water use efficiency. | ||
| Keywords | ||
| Polymer; glycinebetaine; vapor gard; salinity; gladiolus; growth; flowering | ||
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