摘要
以乌桕优株1年生子代幼苗为材料,对其生长特性及光合指标日变化规律进行研究。结果表明:不同优株幼苗的净光合速率日变化规律均呈双峰型曲线,有明显的午休现象,其中6号乌桕为中光合速率、低耗水、高水分利用型;12号为低光合速率、低耗水、低水分利用型;13号为中光合速率、中耗水、低水分利用型;21和23号为高光合速率、高耗水、低水分利用型;24号为低光合速率、低耗水、高水分利用型。此外,优株种子梓油含量与子代幼苗日均水分利用效率,苗高相对生长量与日均净光合速率、日均蒸腾速率均呈显著正相关,日均净光合速率和日均蒸腾速率呈极显著正相关。
The plant growth vigor and photosynthetic characteristics of different Sapium sebiferum seedlings were studied with the one-year-old seedling as experiment material.The results indicated that diurnal variation of net photosynthetic rate for all the tested seedlings showed a bimodal curve,and had distinct lunch break phenomenon.Seedling of No.6 plus plant had medium photosynthetic rate,low water consumption and high efficiency of water utilization.Seedlings of No.12 was low photosynthetic rate,low water consumption and low efficiency of water use.Seedling of No.13 was medium photosynthetic rate,medium water consumption and lower efficiency of water use.Seedlings of No.21 and 23 both were high photosynthetic rate,high water consumption and low efficiency of water use.Seedling of No.24 had low photosynthetic rate,low water consumption and high efficiency of water use.Stillingia oil content positively related with the efficiency of water utilization.Relative height increment of the seedlings positively related with average daily photosynthesis and transpiration rate.Average daily net photosynthetic rate and average daily transpiration rate had significant positive correlation.
出处
《湖南林业科技》
2011年第6期50-53,共4页
Hunan Forestry Science & Technology
基金
国家林业局公益项目(201004071)
关键词
梓油含量
净光合速率
蒸腾速率
水分利用效率
苗高
地径
oil ratio
net photosynthetic rate
transpiration rate
water use efficiency
height
diameter
