EFFECTS OF SALlNlTY ON Enceir'a farinosa AND Oenothera missounensis PLANTS. | ||
| Journal of Plant Production | ||
| Article 10, Volume 30, Issue 6, June 2005, Pages 3301-3318 PDF (14.27 M) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/jpp.2005.237246 | ||
| Author | ||
| Ola A. El-Shennawy, | ||
| Dept. of Floriculture, Ornamental Horticulture and Garden Design. Faculty of Agriculture, Alexandria University, Alexandria, Egypt. | ||
| Abstract | ||
| The experiments were conducted during two seasons of 200212003 and 200312004 at the Floriculture and Ornamental Horticulture Research Garden. at El- Shatby to study the effect of salinity on the growth of two new ornamental plants is. Encalia farinosa and Oenothera missoun‘ensis. The seedlings of each plant were transplanted to 30 cm. pots containing either sandy soil or a mixture of lclay :1 sand {by volume), The pots were irrigated with tap water to: one month then with different levels of (2NaCl: lCaCl2) at 0, 2, 4, 5 and 8 gl'L for five months Date on plant growth parameters were collected including plant heightlfor Enceii'a fanhosa) or plant diameter (for Oenothera missoun‘ensis) , number of branches, leaf area ,dry weights of the shoots and roots. N, P, K, Na, Cl, chlorophyll and protine contents in the leaves. Results show that salinity significantly decreased general plant growth All salt concentrations caused a significant decrease in plant height or plant diameter, shoots and roots dry weights as compared to the control in Encelia farinosa and Oenothera missourr‘ensis in both soil types for the two seasons. The number of branches and the leaf area were not significantly affected by salinity in both seasons, however, the type of soil affected the leaf expansion. The lowest expansion of leaves was recorded with sandy soil as compared to clay soil .There were reductions in N ”/o. P % and K % contents in the leaves of Encelr'a farinosa and Oenothera mi'ssoudensis with increasing the salinity level espeCially in sandy soil for both seasons, Generally, the highest Na % in the leaves of Encelfa farinosa and Oenotnera missourr'ensr’s was recorded at the highest concentration of salt in clay soil followed by the highest concentration of salt in sandy soil in both seasons Cl % increased gradually with increasing salt concentrations but the differences were not significant. The leaves chlorophyll content was studied in the second season only, the salt treatments had no effect on chlorophyll content in both types of soil. Salt treatments significantly increased the proline content in the leaves of Encalia fan‘nosa and Oenothara missourr‘ensrs in both soil types for the two seasons. The highest proline content was recorded in the leaves of Encei’ia farinosa in sandy soil at the highest salt concentration. It is concluded that these two plants can be grown successfully with moderately saline irrigation water Further investigation using sea-water for irrigation may confirm that these two potential new ornamental crops, Enceli'a farinosa and Oenothera mi'ssouriensr's can be grown in the North-West ,Coastai region of Alexandria where irrigation water is a problem. | ||
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