The effects of salinity on the growth, development and yield on IR72 and MR159 paddy varieties

Norhidayati Sunyob, (2008) The effects of salinity on the growth, development and yield on IR72 and MR159 paddy varieties. Universiti Malaysia Sabah. (Unpublished)

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Abstract

Salinity is a major environmental stress that adversely affects plant growth and metabolism.The objectives of this study were to evaluate the effects on salinity on the growth, development and yield of IR 72 and MR 159 rice varieties and to evaluate the tolerance of IR72 and MR159 to salinity. Paddy plants were grown in pots at the field laboratory at School of Sustainable Agriculture in Universiti Malaysia Sabah. The plants were treated with three concentration having electrical conductivities of 1.5-2.0 dS m⁻¹, 3.5-4.0 dS m⁻¹ and 5.5-6.0 dS m⁻¹. The experiment was conducted until plant maturity before harvested. The results showed that the various salinity treatments had no effect on plant height, the number of tillers, the number of panicles, For IR 72 variety, the weight of filled spikelets was significant at 3.5-4.0 dS m⁻¹ but for MR159, the weight of filled spike lets was not significant for various salinity treatments. The 3.5-4.0 dS m⁻¹salt treatment showed the greatest reduction in paddy yield for both varieties. MR 159 variety was more tolerant to salinity compared to IR72 variety.

Item Type: Academic Exercise
Uncontrolled Keywords: salinity, rice varieties, paddy
Subjects: S Agriculture > SB Plant culture
Divisions: FACULTY > Faculty of Science and Natural Resources
Depositing User: Munira
Date Deposited: 20 Jun 2018 00:48
Last Modified: 20 Jun 2018 00:48
URI: http://eprints.ums.edu.my/id/eprint/20173

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