ROLE OF SOME GROWTH SUBSTANCES IN RELIEF HARMFUL OF SALINITY ON RICE CULTIVARS. | ||||
| Journal of Plant Production | ||||
| Article 9, Volume 4, Issue 5, May 2013, Page 827-850 PDF (936.66 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jpp.2013.73078 | ||||
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| Author | ||||
| A. Abdel-Fattah,* | ||||
| Rice Res. and Training Center, Field Crops Res. Inst., Agric. Res. Center, 33717 Sakha- Kafr El-Sheikh, Egypt | ||||
| Abstract | ||||
| Two field experiments were conducted during 2011 and 2012 summer seasons at El-Sirw Agricultural Research Station Farm, Dammietta Governorate, Egypt. The investigation was carried out to study the effects of gibberellic acid, kinetin and urea for increasing the tolerance of rice plants grown under saline conditions. Also, to find out the role of these substance for releifing the harmful of salinity on rice. Data showed that salinity stress in saline soil depressed greatly all the tested growth parameters as well as yield and its components of the three rice cultivars under study. Giza 177 affected more by salinity stress than Sakha101 and Giza 178. The application of growth substances GA3, Kinetin, urea and their combinations could partially mitigate or relief the harmful effects of salinity stress on growth (plant height (cm), number of tillers/hill, crop growth rate (CGR g/day) and leaf area index (LAI) (cm2)), yield and its components (number of tillers/hill, number of panicles/hill, panicle length (cm), panicle weight(g), percentage of unfilled grains/panicle, number of filled grains /panicle, weight of1000-grain (g)and grain yield( ton/fed) and some biochemical's traits (chlorophyll content, soluble sugars, proline content , nitrogen %, phosphorus%, potassium% and sodium content) of rice plant. The results revealed that gibberellic acid (GA3) as combination with urea were the most effective treatment and Giza 178 was the tolerant cultivars and responded more to the growth substances. | ||||
| Keywords | ||||
| gibberellic acid; kinetin; urea; salinity; Rice cultivars; yield and its components | ||||
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