XIAN Kai-Mei,LIU Hui-ying.Effect of Different Nitrogen on Photosynthetic Characteristics of Color Pepper[J].HEILONGJIANG AGRICULTURAL SCIENCES,2015,(02):40-43.[doi:10.11942/j.issn1002-2767.2015.02.0040]
不同水平氮素处理对彩椒光合特性的影响
- Title:
- Effect of Different Nitrogen on Photosynthetic Characteristics of Color Pepper
- 文章编号:
- 1002-2767（2015）02-0040-04
- 分类号:
- S641.306
- 文献标志码:
- A
- 摘要:
- 为确定最佳基质彩椒栽培的氮素施肥配方，运用Li-6400 便携式光合作用测定系统,研究不同氮素水平处理下彩椒的光合特性。结果表明：叶绿素含量以氮营养液15 μmol?L-1的含量最高，其次为20、5和10 μmol?L-1处理，以2.5 μmol?L-1处理的含量最低；叶片净光合速率(Pn) 日变化呈双峰型,有明显的“光合午休”现象。植株叶片净光合速率总体表现为在2.5~15 μmol?L-1氮素浓度范围，随氮素处理浓度的增加而呈现明显的增长趋势。高氮处理20 μmol?L-1的净光合速率低于15 μmol?L-1处理，但与10 μmol?L-1接近。而2.5与5 μmol?L-1处理的净光合速率较低；各处理的蒸腾速率日变化表现为明显的双峰型，N10和N15处理在一天中蒸腾速率较高且变化幅度较大，而其它3个处理蒸腾速率较低且变化幅度平缓；气孔导度以5、10和15 μmol?L-1三个处理植株的叶片在一天中始终处于较高水平，而高氮处理N20的气孔导度在一天中变化较缓，处于最低水平。
- Abstract:
- In order to determine the best nitrogen fertilization formula,soilless cultivation of fertilization photosynthetic characteristics of color pepper under different nitroqen levels was studied with Li-6400 portable photosynthesis measuring system.The results showed that the highest chlorophyll content was N15,followed by N20,N5 and N10 processing,N2.5 was the lowest.The daily variation leaf net photosynthetic rate (Pn)showed bimodal type,there was a clear “photosynthetic noon break” phenomenon with the increasing of the nitrogen concentration，the obvious growth trend was presented.The net photosynthetic rate of high nitrogen treatment N20 was lower than N15,but closed to N10.The net photosynthetic rate of N2.5 and N5 were low; Diurnal transpiration rate of all treatments showed the obvious bimodal type,the transpiration rate of N10 and N15 were high and changed dramaticly,other three treatments had lower transpiration rate and changed gently in one day; Stomatal conductance of N5,N10 and N15 were at higher level,stomatal conductance change of high nitrogen treatment N20 was at the lowest level in a day.
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备注/Memo
收稿日期：2014-10-29
第一作者简介： 鲜开梅（1981-），女，新疆维吾尔自治区昌吉州玛纳斯县人，硕士，助理研究员，从事设施园艺研究。E-mail：condyxkm@126.com。