Evaluation of advanced rice germplasm under water stress environment
Journal Title: International Journal of Environmental Science and Technology - Year 2005, Vol 2, Issue 1
Abstract
Thirteen genotypes of rice comprising of approved varieties and elite candidate lines were studied at three different water regimes by supplying 12, 8 and 4 numbers of irrigations at different intervals/ stages. The experiment was conducted at NIAB Farm Faisalabad, Pakistan on a clay loam soil applying normal doses of N and P fertilizers during 2002-2003 keeping varieties in the main plot while treatments in sub plot. The data for twelve morphological characters i.e. days to flower, days to mature, plant height, panicle length, number of productive tillers, number of primary and secondary branches, 1000 grain weight, sterile grains per spike, number of total grains per spike, fertility percentage, grain yield were recorded and subjected to analysis of variance and means were compared following DMR test. Effect of water stress on different morphological attributes in all treatments showed significant differences. Plant height, branches per plant, number of grains and grain yield reduced at less number of irrigations while sterility percentage was increased at less moisture conditions. Maximum grain yield (5349 Kg/ha) was achieved at T1 where 12 number of irrigations were applied at T2 (8 irrigations) and T3 (4 irrigations). The yield reduction was observed from 30.32% to 42.53%, respectively as compared to T1 (12 irrigations). Rice variety DM 64198 produced the highest seed yield (4766 Kg/ha) followed by DM-3-89 (4770 Kg/ha).This might be due to different genetic make up of the breeding lines and their behavior and interaction in water stress environment. Furthermore, high irrigation level made possible the appropriate water availability possible at proper time for performing different types of physiochemical processes of development that hindered at less number of irrigation or water stress environment. It may be concluded that for achieving maximum economic yield, at least 12 irrigations were essential otherwise the production will be reduced to a considerable extent.
Authors and Affiliations
Y. Ali, G. Sarwar, Z. Aslam, F. Hussain , T. Rafique
Keywords
Related Articles
- EP ID EP139228
- DOI -
- Views 86
- Downloads 0
Bioaccumulation of Cu, Zn and Ni from the wastewater by treated Nasturtium officinale
Aquatic plants are well known in accumulating and in concentrating heavy metals. In this study, several physiological responses of aquatic vascular plant, Nasturtium officinale (watercress), which were elevated concentra...
An investigation on Kangan gas refinery wastewater
Kangan Gas Refinery is one of the greatest gas refineries in Iran. Environmental affects of this refinery should be assessed because of its high economic importance, as well as its considerable revenue. Since the gas ref...
Biodegradation of Cypermethrin by pseudomonas in a batch activated sludge process
The biodegradation of Cypermethrin (20 to 125 mg/L) in an effluent using batch activated sludge was studied. Degradation was found to occur to a great extent only in the presence of Pseudomonas (IES-Ps-1) culture. Under...
Assessment of degradation of agricultural soils arising from brick burning in selected soil profiles
The study was conducted with the selected soil profile of burnt (soil around brick kilns) and unburnt (agricultural land) soils in the Dinajpur, Rangpur, Rajshahi, Khulna and Patuakhali districts to evaluate the effects...
European red spider mite - an environmental consequence of persistent chemical pesticide application<br />