STRESS TOLERANCE INDICES OF MAIZE HYBRIDS IRRIGATED WITH SALINE WATER
Journal Title: International Journal of Agricultural Science and Research (IJASR) - Year 2017, Vol 7, Issue 1
Abstract
Salinity is one of the major abiotic stresses affecting plant growth and development as salinization of cultivated land is increasing globally due to saline water irrigation. There is a considerable variation in salinity tolerance of maize genotypes hence selection of tolerant maize hybrids to saline water irrigation is of great significance in utilising poor quality water for irrigation. The present study was conducted to identify the tolerance of maize hybrids for saline water irrigation under green house condition. Six maize hybrids were chosen and irrigated with saline water having varied inherent salinity levels (0.6, 3.2, 4.8, 6.7 and 8.9 dSm-1) and grown in a clay loam soil for 30 days. Considerable variations were observed in the plant growth attributes of maize hybrids at different salinity levels. Increasing levels of irrigation water salinity decreased the plant growth attributes, dry matter production and stress tolerance indices of all the maize hybrids. However the hybrid CO6 registered higher DMP and better stress tolerance indices. Highly significant and positive correlation between DMP and different stress indices were observed except TOL and among these indices stress tolerance index and DMP stability index has obtained highest r2 value (r2 = 0.92 and 0.90) than mean productivity, geometric mean productivity stress stability intensity for better prediction. It could be implicated in selection of irrigation water salinity tolerant maize hybrid for further development of management strategies.
Authors and Affiliations
NANDHINI DEVI BALASUBRAMANIAN, CHITDESHWARI THIYAGARAJAN
Keywords
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