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[油茶苗]氮素营养对广宁红花油茶幼苗生长及光合特性的影响

发布时间:2021-01-18来源:全冠香樟树

In order to explore the effects of different nitrogen levels on the growth and photosynthetic physiological characteristics of Camellia semiserrata Chi.,an exponential fertilization trial was conducted with 6 nitrogen dose levels(applying a total of 0,1000,2000,3000,4000,5000mg/seedling in this experiment)of nitrogen to research the effects of different nitrogen levels on height ' ground diameter ' biomass and photosynthetic physiology characters of Camellia semiserrata Chi.It was indicated that:nitrogen exponential fertilization could bring a significant impact on growth and photosynthetic physiology of seedlings.(1)The heights of Camellia semiserrata Chi.fertilized by 0mg/seedling achieved the worst effect.The height and ground diameter of Camellia semiserrata Chi.fertilized by 4000mg/seedling achieved the maximum,the biomass fertilized by 1000mg/seedling achieved the maximum.From the growth performance of Camellia semiserrata Chi.among different treatments,nitrogen had a greater impact on height than biomass and the effect on ground diameter was the least.(2)Effects of varied nitrogen exponential fertilization treatments on photosynthetic characteristics of Camellia semiserrata Chi.showed similar law.The net photosynthetic rate showed 2 times increasing firstly and then reducing.With the increase in the amount of nitrogen fertilizer,the changing trend of the transpiration rate and internal CO 2 concentration kept consistent with the changing trend of stomata conductance.

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[油茶苗]氮素营养对广宁红花油茶幼苗生长及光合特性的影响

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