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栽培穿龙薯蓣田间持水量与光合作用关系研究

发表时间:2010-09-30  浏览量:1509  下载量:457
全部作者: 石磊,田义新,武惠斌,杨海峰,刘洋,张妍
作者单位: 吉林农业大学中药材学院
摘 要: 对栽培穿龙薯蓣(Dioscorea nipponica Makino)田间持水量与光合作用的关系进行研究,为穿龙薯蓣栽培的水分管理提供理论依据。采用盆栽实验,用CI-340超轻型便携式光合测定仪进行光合参数的测定。结果表明:70%的田间持水量是穿龙薯蓣光合能力最强的土壤含水量,在这一条件下,蒸腾速率和水分利用效率也较高。在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12:00和16:00,分别为7.3,6.5 μmol·m-2·s-1,有轻微的光合“午休”现象。因此,得出栽培穿龙薯蓣以控制土壤水分含量为田间持水量的70%为最佳的结论。
关 键 词: 作物栽培学;穿龙薯蓣;田间持水量;光合作用
Title: Study on the relationship between field water capacity and photosynthesis of cultivated Dioscorea nipponica Makino
Author: SHI Lei, TIAN Yixin, WU Huibin, YANG Haifeng, LIU Yang, ZHANG Yan
Organization: College of Traditional Chinese Medicine Materials, Jilin Agricultural University
Abstract: The relationship between field water capacity and photosynthesis of cultivated Dioscorea nipponica Makino was researched in this paper to supply a theory reference in the herbs’ water management. The pot experiment was used and the relative photosynthesis parameters were measured with portable photosynthesis instrument CI-340. The results showed that 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 tended to a double-peak curve when the field water capacity was beyond 50%. The peak values appeared at 12:00 and 16:00, they were 7.3, 6.5 μmol·m-2·s-1 respectively, showed a slight “noon break” phenomena. The conclusion, therefore, is that the 70% field water capacity would be the optimum value in the Dioscorea nipponica Makino cultivation.
Key words: crop cultivation; Dioscorea nipponica Makino; field water capacity; photosynthesis
发表期数: 2010年9月第18期
引用格式: 石磊,田义新,武惠斌,等. 栽培穿龙薯蓣田间持水量与光合作用关系研究[J]. 中国科技论文在线精品论文,2010,3(18):1869-1872.
 
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