P. Salehi Shanjani; S.E. Seyedian; H. Javadi
Abstract
In order to investigate the effects of different irrigation intervals on morphological characteristics of different Achillea millefolium L. populations, an experiment was conducted at the experimental field of Research Institute of Forests and Rangelands during 2012 and 2013. Three irrigation intervals ...
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In order to investigate the effects of different irrigation intervals on morphological characteristics of different Achillea millefolium L. populations, an experiment was conducted at the experimental field of Research Institute of Forests and Rangelands during 2012 and 2013. Three irrigation intervals (7, 14 and 21 days) and 19 A. millefolium populations were compared in a factorial experiment based on a complete randomized block design with three replications. As many plants were lost in irrigation interval of 21 days, comparison was continued with irrigation intervals of 7 and 14 days. Results showed that irrigation intervals and population origins had significant effects (P≤0.005) on the plant height, crown diameter, stem number, dry matter yield (g plant -1 ), flower diameter, flower number and flowering time. In almost all populations the plant height, crown diameter and flower diameter decreased, whereas flower number per plant and the full flowering time increased in irrigation interval of 14 days. The 19 populations were grouped into three clusters. Populations in the cluster I had higher plant height, yield and flowering time. Populations in the cluster III showed higher crown diameter, flower diameter, stem number and flower number, and shorter full flowering time. These results indicated that populations in the cluster III had favorable potential production in semi-arid regions.
A. Rahimi
Abstract
In order to investigate seed pre-treatment and irrigation interval effects on quantity and quality yield of the primed seeds of cumin (Cuminum ciminum L.), an experiment was carried out in research field of Vali-e-Asr University of Rafsanjan in 2009. The study was conducted as a Factorial experiment ...
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In order to investigate seed pre-treatment and irrigation interval effects on quantity and quality yield of the primed seeds of cumin (Cuminum ciminum L.), an experiment was carried out in research field of Vali-e-Asr University of Rafsanjan in 2009. The study was conducted as a Factorial experiment based on RCBD with four levels of seed pre-treatment (Control or without pre-treatment, seed pre-treatment with distilled water, seed pre-treatment with -0.3 and -0.9 Mpa PEG solution) and different irrigation intervals (5, 7, 9 and 11 days). The results indicated that the seed yield was significantly decreased with increasing of irrigation intervals which was related to more decrease of umbel number and seed number per umbel. The results also indicated that the percentage of the essence was increased with increasing irrigation interval however it was decreased in 11-day irrigation interval. Thousand seed weight and harvest index were not affected by seed pre-treatment and irrigation intervals. The highest umbel number in plant (14.62) and seed number per umbel (13.16) were obtained in seed pre-treatment of -0.3 Mpa PEG (P3), and in 5 and 7-day irrigation intervals. Totally, the highest seed yield (628.7 kg.ha-1) was obtained in seed pre-treatment of -0.3 Mpa PEG (P3) and 5-day irrigation interval and the highest essence content (3.62 %) was obtained in pre-treatment of distilled water (P2) and 7-day irrigation interval.
K. Moradi; A. Hamdi Shangari; M.H. Shahrajabian; M.H. Gharineh; M. Madandost
Abstract
This experiment was conducted in Khosheh Sabz Sonboleh Institute in Fasa during 2007-2008. In this study Isabgol (plantago ovata Forsk.) yield reaction and quality characteristics of irrigation intervals and different levels of nitrogen were studied. Completely random design with 3 replications was used. ...
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This experiment was conducted in Khosheh Sabz Sonboleh Institute in Fasa during 2007-2008. In this study Isabgol (plantago ovata Forsk.) yield reaction and quality characteristics of irrigation intervals and different levels of nitrogen were studied. Completely random design with 3 replications was used. Factors included 3 irrigation intervals (7, 10 and 14 days) and 3 nitrogen levels (0, 30 and 60 kg). Variance results showed that variations of grain yield, biological yield and mucilage yield were significant. Drought intensity also increased percentage of mucilage yield significantly. The best economic and biological quality was obtained by short irrigation interval. In long irrigation interval, two characteristics showed significant decrease, but against biological yields, they showed increased trend. Therefore, with increased amount of nitrogen, economic yield, biological yield and mucilage were increased. Grain and biological yield in drought stress condition in long irrigation intervals showed less response than increasing nitrogen levels.
