E. Sharifi Ashoorabadi; M.H. Lebaschy; A. Matin; B. Naderi; M. Rezaei; M. Gholypoor; K. Alizadeh Anaraki; B. Allahverdi
Abstract
In order to study the effects of irrigation and dry farming condition on growth indices of yarrow (Achillea millefolium L.) an experiment was carried out in Alborz Research Center during 2005-2006. In the first year after planting, the plants viability investigated in dry farming condition and growth ...
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In order to study the effects of irrigation and dry farming condition on growth indices of yarrow (Achillea millefolium L.) an experiment was carried out in Alborz Research Center during 2005-2006. In the first year after planting, the plants viability investigated in dry farming condition and growth physiological indices were determined. In the second year, the treatments were irrigated based on total accumulated evaporation from class A pan namely at the rate of 30 mm (mild stress), 60 mm (medium stress), 90 mm (severe stress), full irrigation (no stress) and no irrigation (control). For each treatment, the soil moisture content was measured by weighting method (daily) before and after applying irrigation treatments. The amount of water requires for each treatment was measured by water meter.In the second year, the growth physiological indices were also determined. The results showed that, at the first year, dry matter cumulated to 2250 GDD then reduced during growth. In second year, the plants with no irrigation were died. In other treatments, by increasing soil moisture from severe to medium, the dry mater cumulative and Leaf area index increased. In all of the stress treatments, decreasing in plant growth was observed in 3000 GDD. The results showed that, mild water stress had highest performance than other treatments.
S.A.R. Valadabadi; M.H. Lebaschi; H. Aliabadi Farahani
Abstract
Growth indices are useful for interpreting plant reaction to environmental factors. In order to study the effects of arbuscular mycorrhizal fungi (AMF), P2O5 fertilizer and irrigation according to physiological growth indices of coriander, this experiment was conducted at Iran Research Institute of Forest ...
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Growth indices are useful for interpreting plant reaction to environmental factors. In order to study the effects of arbuscular mycorrhizal fungi (AMF), P2O5 fertilizer and irrigation according to physiological growth indices of coriander, this experiment was conducted at Iran Research Institute of Forest and Rangelands in 2006. Field experiment was carried out in split factorial based randomized complete block design with 4 replications. The factors studied included application and non-application of mycorrhiza (Glomus hoi), 0, 16 and 32 kg/ha P2O5 fertilizer (triple super phosphate) and two levels of irrigation, irrigation after 30 mm water evaporation from evaporation pan (without drought stress conditions) and irrigation after 60 mm water evaporation (drought stress conditions). The results of 7 sample stages showed that applications of mycorrhiza and 70 kg/ha phosphorus without drought stress conditions increased dry matter, leaf area index, relative growth rate, net assimilation rate and crop growth rate and these characteristics decreased under drought stress conditions sorely. The results showed that mycorrhiza fungi could increase absorb of phosphorus by symbiosis between fungi and coriander root. This condition can reduce application of phosphorus fertilizers in fields, without reducing of yield and quality yield.
E. Sharifi Ashoorabadi; A. Matin; M.H. Lebaschi
Volume 19, Issue 2 , August 2003, , Pages 157-182
Abstract
To investigate different method of soil fertilization and their effects on physiological growth indices a filed experiment was carried out on Fennel (Foeniculum vulgare Mill.) a medicinal plant, in Alborz Research complex, (NPK), used in commercial agriculture systems, a mixture of different ratios of ...
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To investigate different method of soil fertilization and their effects on physiological growth indices a filed experiment was carried out on Fennel (Foeniculum vulgare Mill.) a medicinal plant, in Alborz Research complex, (NPK), used in commercial agriculture systems, a mixture of different ratios of fertilizers and manure, used in intermediate systems as well as different levels of manure used in sustainable systems, with were in comparison to the control (no fertilizers and manure applied) that selection in three systems. The experiment was conducted using a randomized complete blocks design with three replication. The physiological growth indices, such as dry matter, Leaf area index, and relative growth rate were determined. Dry matter and leaf area index in the intermediate system "20 tonha -1 of manure mixed with N=80, P=64 and K=80 kgha-1 of chemical fertilizers" pointed a noticeable increase during plant growth, compared to the methods. Seed yield increased %93.2, %14.1 and %8.6 related to control, chemical and organic systems respectively. In seed, the essential oil was %3.18 that increased %22.8 related to control and chemical system respectively and %10.8 related to organic system. In the essential oil, anethole increased. Application of intermediate system improved soil physical, chemical and biologica properties and raised absorption of nutrient, plant canopy and light interception in agroecosystes.
