H. Aliabadi Farahani; M.H. Lebaschi; A.H. Shiranirad; S.A.R. Valadabadi; A. Hamidi; A. Alizadeh Sahzabi
Volume 23, Issue 3 , November 2007, , Pages 405-415
Abstract
In order to study the effects of Glomus hoi fungi, different levels of phosphorus and drought stress on some physiological characteristics of coriander (Coriandrum sativum L.), was conducted at Karaj Research Institute of Forest and Rangelands in 2006. Field experiment was carried out by a split factorial ...
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In order to study the effects of Glomus hoi fungi, different levels of phosphorus and drought stress on some physiological characteristics of coriander (Coriandrum sativum L.), was conducted at Karaj Research Institute of Forest and Rangelands in 2006. Field experiment was carried out by a split factorial design with 4 replications. The factors were two level drought stress with irrigation after 30 mm water evaporation from evaporation pan (without stress conditions) and irrigation after 60 mm water evaporation (drought stress conditions) and also application and non-application of mycorrhiza, 0, 35 and 70 kgha-1 phosphorus fertilizer. The results showed drought stress has significant effect on water use efficiency, relative water content and proline accumulation rate (α=1%). Highest water use efficiency with 0.449 kgm-3 and proline accumulation rate with 6.767 mmol/ml were achieved under stress conditions and highest relative water content with %90.6 was achieved without stress conditions. Also, the results showed mycorrhiza and phosphorus had significant effects on water use efficiency (α=5%). Comparison of means showed that highest water use efficiency with 0.395 kgm-3 and 0.4 kgm-3 was achieved under application of mycorrhiza and application of 70 kgha-1 phosphorus, respectively. Relative water content and proline accumulation rate were not significantly affected due to phosphorus and mycorrhiza. The results showed that water use efficiency and proline accumulation rate were increased under drought stress conditions but relative water content decreased.
A. Alizadeh Sahzabi; E. Sharifi Ashorabadi; A.H. Shiranirad; B. Abaszadeh
Volume 23, Issue 3 , November 2007, , Pages 416-431
Abstract
The effect of applying different methods and nitrogen levels on yield and essential oil of savagery (Satureja hortensis L.) was investigated using a factorial experiment based on randomized complete block design with 3 replications in 2005, Karaj, Iran. The treatments included application of solid nitrogen ...
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The effect of applying different methods and nitrogen levels on yield and essential oil of savagery (Satureja hortensis L.) was investigated using a factorial experiment based on randomized complete block design with 3 replications in 2005, Karaj, Iran. The treatments included application of solid nitrogen in soil with 4 levels 0, 50, 100 and 150 kg/ha and spray of nitrogen on foliage with 4 levels 0, 4.5, 6 and 7.5 percent. The nitrogen applied three times equally. The results showed, effect of treatments on biological yield, plant height, essential oil percentage, flowering shoot yield, number of lateral branch (P< 0.01) and harvest index were significant (P<0.05). Interaction of treatments on essential oil percentage, essential oil yield, flowering shoot yield (P<0.01) and biological yield (P<0.05) were significant. This experiment found that applying 100 kg pure nitrogen in soil with 4.5% produced highest biological yield, seed and flowering shoot with means of 4424, 875.3 and 1855 kg ha-1, respectively. The results showed, increase of nitrogen application caused decrease of essential oil percentage. Highest essential oil percentage related to application of 6% of nitrogen solution with mean of 2.13%. Utilization of 150 kg of solid nitrogen with 7.5% of nitrogen solution produced highest plant height with mean of 66.88 cm, highest lateral branch with mean of 18 and highest essential oil yield with mean of 33.7 kg ha-1. Highest harvest index related to control with mean of 25.98%. The results showed that use of sprayed nitrogen on foliage decrease nitrogen application. Therefore, this method could be suitable for sustainable agriculture.
