Investigation On Seedling Production Of Monterrey Pine (Pinus Radiata D.Don.) In Eastern Mazandaran (Passand Research Station - Northern Iran)
2007
Kiasari, Sh. M., Member of Scientific Board’ Research Center of Agriculture and Natural Resources, Mazandaran. | Mousavi, S. A., Master of Science, Natural Resources Office, Sari- Mazandaran, | Borhani, A., Member of Scientific board, Research Center of Agriculture and Natural Resources’ Mazandaran | Pornajaf, S., Master of Science, Research Center of Agriculture and Natural Resources, Mazandaran | Ghasemi, S., Expert of Research Center of Agriculture and Natural Resources, Mazandaran
The objective of this study was to find out the restrictions of seedling production of Monterry pine (Pinus radiata) in nursery. The statistical analysis of qualitative and quantitative parameters seedlings showed that there were significant differences between sowing dates of Autumn and Spring. In respect to quantitative parameters (average collar diameter and average height), the Autumn sowing date was significant better than spering sowing date, and in relation to qualitative parameters (average percent survival and average quality degree) the Spring sowing date was significant greater than the autumn sowing date(p 0.01). Of course it must be mention that because of collecting was performed at middle of September so next year the seedlings of Autumn sowing date had more time to growth than the seedlings at Spring sowing date. Continuous investigation of seedling for two years showed that only a few seedlings(almost 8 percent) had suitable quality and quantity growth in the end of the second years. According to lab tests, there are not any evidance of pests or diseases on the dead seedling, so physical and chemical soil test was performed and the results showed that High pH and lack of the micorhiza were the soil factors which had negative effects of the seedlings survival and growth.
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