浅析枫桥香榧(细榧)产量与气象因子的关系

Preliminarily Study on the Relationship between the Yield of Fengqiao Torreya grandis(Xifei) and Meteorological Factor

[目的]合理利用气象条件,提高香榧产量。[方法]通过了解枫桥香榧(细榧)产量的年际变化及其生物学特性,分析气象因子与香榧产量的关系。[结果]枫桥香榧(细榧)产量年际波动大,关键是主要生育物候期的气象因子,本真阶段:2～3月寒潮及临界低温-7℃,盛夏临界高温天数20d和临界雨日12d;假真阶段:临界日平均气温15℃,中下旬低温和连阴雨临界累计日数8d,中旬低温和连阴雨临界累计日数5d;实真阶段:5～6月临界日照时数300h和临界降水日30d。[结论]开花前(本真阶段)雨水调匀、温度适宜,花期(假真阶段)和落花落果期(实真阶段)少雨多照和多雨凉夏的气候有利于香榧丰产。

[Ohjec.tive] The research aimed to utilize the meteorological conditions reasonably and increase the yield of Torreya grandis, [Method] Through understanding the annual changes of the yield of Fengqiao T, grandis （Xifei） and its biological characteristics, the relationship between the meteorological fac.tors and the yield of T. grandis was analyzed. [Result] The annual fluctuation of the yield of Fengqiao T. grandis （Xifei） was great, the key was the meteorological factor of main growth phenophase. In the originally truth phase, the key meteorological factor included cold wave and critical low temperature of -7℃ from February to March, the critical high- temperature days of 20 d in midsummer, the critical rainy days of 12 d. In the false -truth phase, that included the critieal daily average temperature of 15℃, the critical accumulative days of low temperature and continuous rain in middle and last ten-day and of 8 d and the critical accumulative days of low temperature and continuous rain in middle ten days. In the real truth stage, that included the critical sunlight hours from May to June of 300 h and the critical rainy days of 30 d. [Conclusion] Suitable rainfall and temperature before blooming （the originally truth phase） and little rainfall and more sunlight in florescence （False stage） and more rainfall and cool summer were favorable for the production of T. grandis.