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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：2080 下载量：544
| 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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