摘要
以海南长蒂槟榔种为材料,采用盆栽试验,通过控制土壤含水量,研究不同水分胁迫对槟榔幼苗光合特性的影响。结果表明:随着土壤水分胁迫的加剧,槟榔幼苗的净光合速率(Pn)、蒸腾速率(Tr)、气孔导度(Gond)下降,胞间CO2浓度(Ci)升高,干旱降低槟榔的净光合作用,限制气体交换。槟榔幼苗的水分利用效率和土壤水分含量成负相关,即水分胁迫程度越深,叶片的水分利用效率越高。
Arecanut seedlings were used as experimental material to study the effect of different moisture treatments on photosynthetic characteristics by controlled irrigation. The results showed that along with the severity water stress, the photosynthetic rate (Pn), transpiration rate (Tr), stomatal conductance (cond) reduced, CO2 concentrations inside cells increased. So arecanut seedings can endure and adapt to drought stresses under conditions of lower soil water content. The water use efficiency (WUE) and soil moisture had negative correlation.
出处
《热带农业科学》
2010年第2期8-12,共5页
Chinese Journal of Tropical Agriculture
基金
海南省教育厅基金(No.Hj2009-18)
原华南热带农业大学校基金(No.Rnd0707)
关键词
槟榔
土壤水分胁迫
光合特性
水分利用效率
arecanut
water stress
photosynthetic characteristics
water use efficiency