| Autor: |
ZAYED, B. A., METWALLY, T. F., BASSIOUNI, S. M., NAEEM, E. S. |
| Předmět: |
|
| Zdroj: |
Egyptian Journal of Agricultural Research; 2015, Vol. 93 Issue 2(B), p515-533, 19p |
| Abstrakt: |
A two-year experiment was conducted in the greenhouse in cement sinks with an area of 7.5 m² each during 2012 anp 2013 seasons. The saline and sodic soils were brought from original soil in El-Sirw and Port Said with EC of 8 ds m-1and pH 9.5 for saline and sodic soil, respectively. The main objective of the present research was to study the performance of four rice cultivars, i.e. Giza177, Giza178, Sakha104 and Egyptian hybrid rice 1 (EHR1) under saline and sodic conditions compared to normal conditions. A split plot design in a randomized complete block arrangement was used with three replications. The sodicity and salinity of soil were weekly measured and readjusted by adding the solution of sodium chloride + calcium chloride and sodium carbonate + sodium bicarbonate to keep the tested levels. Those cultivars markedly varied in their performance under elaborated stress conditions. Giza 177 was the worst under both stresses. Sakha104 could be characterized as moderately tolerant, while EHRl was the most recognized tolerant cultivar for both stresses followed by Giza178. On the other hand, EHRl gave the largest leaf area index, large flag leaf, high dry matter production, high chlorophyll content, and high values of grain yield and most yield attributes. However, the tolerant cultivars recorded low k+/Na+ ratio but recorded the highest values compared to the most sensitive one (Giza177). The tested salt stress significantly affected rice growth and yield in both seasons, while the harmful effect of sodicity condition was less than that induced by saline stress. It could be concluded that rice crop is sensitive to saline conditions and moderately tolerant for sodic conditions. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
|
