نوع مقاله : مقاله پژوهشی
نویسندگان
Dept of Range management, Gonbad kavous University
چکیده
کلیدواژهها
عنوان مقاله [English]
نویسندگان [English]
Seed storage of range species especially for key species and palatable is inevitable for improvement and development of rangelands. After gathering seeds within the site and separating litters and defect seeds, they are kept in oven at a temperature 30°C and when their humidity is about 10 percent, we take them out. Now in 44 containers all with their shutters, put in each 150 random seeds and put to them four treatments: 0-5, 5-10, 15 and 20 °C. We put each of the eleven containers in separate storage areas and using a germination machine, measuring the germination capacity will be possible. Results show that all of the temperatures have a significant difference at 5% and maximum ratio of germination achieves at 0-5 °C during 6 months. Interaction between storage conditions and storage periods shows that storage periods of seeds till 9 months for temperatures 0-5 and 5-10°C, the percentage of germination capacity will increase and then will decrease. But of treatments 15 and 20 °C with an increase in time of storage, the germination of K. prostrata will decrease. It seems that temperature is one of the factors that decrease the after-ripening period but this factor in a short time has a severe effect on the germination capacity of K. prostrata. Seeds of K. prostrata can sustain more than 50% of their germination capacity at temperatures 0-5 and 5-10 °C during 24 months.
کلیدواژهها [English]
. Agrwal, R. L., 2005. Seed technology. Oxford and IBH Publishing. CO. P: 829. 2. Al-Ahmadi, M.J., Kafi, M., 2007. Cardinal temperatures for germination of Kochia scoparia (L.). Journal of Arid Environments 68, 308-314. 3. Alimaev, I and Pryanishnikov, S.N. 1989. Creation and use of rangeland agrophytogenoses in the desert of northern Kazakhstan. Problems of desert development. No 3, p 84-87.
4. Baghestani Maybodi, N., Zandi Esfahan, E. and Zare, M. T., 2015. Effects of Pruning on Haloxylon aphyllum L. Dimensions and its Application in Biological Reclamation of Desert Regions in Yazd Province. Jour of Rangeland Science, 2: 153 – 162. 5. Butola, J.S, Badola, H.K. 2004. Effect of presowing treatment on seed germination and seedling vigour in Angelica glauca, a threatened medicinal herb. Current Science. 87(6):796–799. 6. Chen, S.Y., Kuo, S. R and Chien, C. T. 2007. Storage behaviour of seeds of Cinnamomum
osmophloeum and Neolitsea aciculata var. variabillima (Lauraceae). Seed Science and Technology, vol. 35, no. 1. 7. Butola, J.S, Badola, H.K. 2006. Seed germination improvement using chemicals in Heracleum candicans Wall, a threatened medicinal herb of Himalaya. Indian Forester,130(5):565–572. 8. Kitchen, S. G and Monsen, S. B. 2001. Forage kochia seed germination response to storage time and temperature. J. Range Manage. 54: 299–306. 9. Lotfi, M. 1996. Autecological investigation on Kochia prostrate in Gorgan and Gonbad regions. M.s.c, Thesis. Tarbiat Modares University, 137p. 10. Orlovsky, N. S., Japakova, U. N., Shulgina, I., Volis, S. 2011. Comparative study of seed
germination and growth of Kochia prostrata and Kochia scoparia (Chenopodiaceae) under salinity. Journal of Arid Environment. Vol 75, Issue 6. 11. Pradhan, B. K and Badola, H. K. 2008. Seed germination response of populations of Swertia chirayita following periodical storage. Seed Technology, vol. 30, no. 1. 12. Tavili, A., Mirdashtvan, M., Rezvan, B., Alijani, C., Yousefi, M, Salman Zare, E. 2014. Effect of Different Treatments on Improving Seed Germination Characteristics of Astragalus adscendens and Astragalus podolobus. Journal of Rangeland Science, Vol. 4, No. 2
)