摘要
目的研究栽培牛蒡田间持水量与光合作用的关系,为牛蒡栽培的水分管理提供理论依据。方法盆栽试验,用CI-340超轻型便携式光合测定仪进行光合参数的测定。结果 70%的田间持水量下牛蒡光合能力最强,在这一条件下,蒸腾速率和水分利用效率也较高。在70%和50%田间持水量条件下,净光合速率日变化均呈明显的双峰曲线,70%田间持水量的峰值出现在中午12时和下午16时,分别为6.3、6.2μmol/m2/s,有轻微的光合"午休"现象。结论栽培牛蒡以控制土壤水分含量为田间持水量的70%最佳。
Objective The relationship between field water capacity and photosynthesis of cultivated Arctium lappa L. was researched in this paper to supply a theory reference in the herbs＇ water management. Method The pot experiment was used and the relative photosynthesis parameters were measured with portable photosynthesis instrument C1-340. Result The three photosynthesis parameters of the net photosynthetic rate （Pn）, transpiration rate （Tr） and water use efficiency （WUE） all reached a higher value when the field water capacity was 70%. The diurnal variation of the Pn tends to a double-peak curve when the field water capacity is 70% and 50%. The peak value presented at 12 o＇clock and 16 o＇clock in the 70% field water capacity, they are 6.3, 6.2μmol/m2/s respectively, show a slight ＂noon break＂ phenomena. Conclusion The 70% field water capacity would be the optimum value in the Arctium lappa L. cultivation.
出处
《人参研究》
2013年第1期16-18,共3页
Ginseng Research
基金
国家科技部"十一五"支撑计划项目(编号:2006BAI09B05-10)
关键词
牛蒡
田间持水量
光合作用
Arctium lappa L.
Field water capacity
Photosynthesis
