Observation on the Mature Period of Masson Pine Male Cones and Its Climatic Impact
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1.
Forestry Bureau of Chun'an County, Zhejiang Province, Chun'an 311700, Zhejiang, China
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2.
Pine Pollen Research and Development Center, Chinese Academy of Forestry, Fuyang 311400, Zhejiang, China
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3.
Research Institute of Subtropical Forestry, Chinese Academy of Forestry, Fuyang 311400, Zhejiang, China
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4.
Laoshan Forest Farm, Xin'anjiang Development Company of Chun'an County, Chun'an 311700, Zhejiang, China
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5.
Jinfengxiang Forest Station of Chun'an County, Zhejiang Province, Chun'an 311701, Zhejiang, China
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Received Date:
2009-02-03
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Abstract
The morphology of mature male cones was observed and the impact of climate was studied. The collecting days of mature pollen at Chun'an County, Zhejiang Province, was during the 3-5-days period from the end of Mach to the beginning of April in normal temperature years, which would be 3-5 days later in low temperature years and 3-5 days earlier in high temperature years. The male cones at lower elevation blossom 6-8 days earlier than those at the elevation of 120-550 m. Therefore, it is practical to prolong reasonably the collecting period of pollen.
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Proportional views
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