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Asian Journal of Plant Sciences
  Year: 2007 | Volume: 6 | Issue: 8 | Page No.: 1229-1234
DOI: 10.3923/ajps.2007.1229.1234
 
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The Effects of Irrigation Intervals and Manure on Quantitative and Qualitative Characteristics of Plantago ovata and Plantago psyllium

A. Koocheki, L. Tabrizi and M. Nassiri Mahallati

Abstract:
The yield, yield components and quality of two species of Isubgol (Plantago ovata) and Psyllium (Plantago psyllium) as affected by irrigation intervals under organic cultivation was studied. Field trial was conducted in 2002 in Faculty of Agriculture, Ferdowsi University of Mashhad (in Iran) with a split-factorial design based on a complete randomized block arrangement with three replications. Water stress was imposed by three different irrigation intervals (10, 20 and 30 days) which were allocated to main plots and a combination of three levels of animal manure at 5, 10 and 15 t ha-1 with two species allocated to subplots in a factorial manner. A complementary laboratory experiment was also conducted to determine the cardinal temperatures for seed germination. Constant temperatures of 5, 7, 10, 15, 20, 25, 30 and 35°C were arranged in a completely randomized design with four replications for the two species and the effect of these temperatures on percent and rate of germination were determined. Results showed that water stress had a negligible negative effect on most parameters evaluated except length of spike and seed yield which were affected negatively by increasing the length of irrigation intervals. Highest yield in both species were obtained with 10 and 20 day intervals between irrigations. Animal manure had significant effect only on yield and the maximum yield were obtained with 5 t ha-1 for Isubgol and 15 t ha-1 for Psyllium. There was no correlation between mucilage content, swelling factor and seed size. Results of laboratory trial showed that maximum rate of germination was obtained at 20 and 25°C and maximum percentage of seed germination was obtained at 15 and 25°C in Isubgol and Psyllium, respectively. Optimum germination ranged from 10-20 and 15-25°C for Isubgol and Psyllium, respectively. Based on a linear regression between rate of germination and temperature, cardinal temperatures (minimum, optimum and maximum) were 4.4, 19 and 25.5, 9.4, 28.8 and 35°C for Isubgol and Psyllium, respectively.
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How to cite this article:

A. Koocheki, L. Tabrizi and M. Nassiri Mahallati , 2007. The Effects of Irrigation Intervals and Manure on Quantitative and Qualitative Characteristics of Plantago ovata and Plantago psyllium. Asian Journal of Plant Sciences, 6: 1229-1234.

DOI: 10.3923/ajps.2007.1229.1234

URL: https://scialert.net/abstract/?doi=ajps.2007.1229.1234

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