胡桃楸个体有性生殖过程研究

Studies on individual sexual reproductive process of Juglans mandshurica

胡桃楸是东北东部山地阔叶红松林的重要组成树种。以胡桃楸个体有性生殖过程为研究对象 ,通过定株定枝调查 ,研究了胡桃楸芽种群分化、物候及散粉规律、果实生长发育过程及环境影响因子。结果表明 :1 .胡桃楸壮龄树芽种群分化简单。2 .胡桃楸个体间花期物候差异很大 ,并具有典型的雌雄异熟现象。 3.胡桃楸幼果期生长速度快 ,生长分化现象严重 ,疏果率高 ;进入果实生长后期之后 。

Juglans mandshurica is one of the most important component species of the mixed forest of the broadleaved species and Korean pine forest in the eastern mountains in Northeast China.Based on the continuous investigation of the located tree and branch,taking the individual sexual reproductive process as the object of research,this paper studies the development of bud population,the regulation of phenology and pollen distribution,the sexual reproductive behaviors of Juglans mandshurica ,and the various environmental factors that interfere the reproductive process.A general conclusion is as followings:1.The development components of bud population of adult individuals are simple;2.There is very different phenology characteristics in blooming period among the individuals,and the mature period of male flower is prior to that of the female;3. In the beginning of fruit growth period the young fruits grow fast and differentiate seriously,which results in that fruit thinning rate is high;In the end growth period,the rate of growth and the rate of fruit thinning is both lower relatively.