CO2浓度升高和施氮对冬小麦光合面积及粒叶比的影响
文献类型：期刊论文
| 作者 | 许育彬 ; 沈玉芳 ; 李世清 |
| 刊名 | 中国生态农业学报
 |
| 出版日期 | 2013 |
| 卷号 | 21期号:09页码:1049-1056 |
| 关键词 | 冬小麦 Winter wheat CO2浓度 CO2 concentration 施氮 Nitrogen addition 光合面积 Photosynthetic area 粒叶比 Grain-leaf ratio 库源关系 Sources-sink relationship |
| 其他题名 | Effects of elevated CO2 and nitrogen application on photosynthetic area |
| 中文摘要 | 利用开顶式气室和盆栽方法,以冬小麦品种"小偃6号"和"小偃22"为供试材料,在2种CO2浓度(375μL.L 1和750μL.L 1)和3个施氮水平[0、0.15 g(N).kg 1(土)和0.30 g(N).kg 1(土)]下分析了小麦抽穗期绿色叶片、非叶光合器官(茎鞘、穗、芒)的形态和光合面积以及粒叶比对CO2浓度升高和施氮的反应。结果表明,施氮有助于小麦叶和非叶光合器官伸长和增宽(粗),增加其光合面积、穗粒数、穗粒重、粒数叶比和粒重叶比。与背景CO2浓度(375μL.L 1)相比,CO2浓度升高对叶片和茎节长度、茎叶和芒光合面积具有明显的正向效应(P<0.05),但对叶宽、茎节直径、穗面积影响不明显(P>0.05),使"小偃6号"和"小偃22"单茎光合面积分别增加8.1%~15.1%和2.8%~13.2%,且均以0.30 g(N).kg 1(土)施氮水平下增幅最大。CO2浓度升高后,穗粒数和粒数叶比在3个施氮水平下均不同程度增加,其中2个品种粒数叶比分别在0.30 g(N).kg 1(土)和0.15g(N).kg 1(土)施氮水平下增加最明显,增幅分别为44.2%和4... 更 |
| 英文摘要 | Either CO2 enrichment or nitrogen (N) application influences growth and development of wheat (Triticum aestivum L.). The effects of elevated CO2 concentration and nitrogen addition on the photosynthetic area of source organs (green leaves, stem & sheath, spike and awns), grain number and weight per spike, and grain-leaf ratio of winter wheat at heading stage were investigated in this study. The pot experiment was carried out in open top chambers (OTCs) with two wheat varieties, “Xiaoyan 6” and “Xiaoyan 22”, as materials in 2008—2009. Wheat plants were grown under different treatments of two CO2 concentrations (375 μL·L1 and 750 μL·L1) and three nitrogen application levels [0, 0.15 g(N)·kg1(soil) and 0.30 g(N)·kg1(soil)]. The results showed that nitrogen application significantly increased leaf length and width, stem node length and diameter, spike length and width, awn length. The photosynthetic area, grain number and weight per spike, and grain-leaf ratio of wheat were also enhanced under nitrogen application. Compared with ambient CO2 concentration (375 μL·L1), elevated CO2 concentration (750 μL·L1) positively influenced leaf and stem node length, photosynthetic area of leaf, stem node and awn (P < 0.05); but it insignificantly affected leaf width, stem node diameter and spike area (P > 0.05). CO2 concentration elevation increased the photosynthetic area per stem of “Xiaoyan 6” and “Xiaoyan 22” by 8.1%~15.1% and 2.8%~13.2%, respectively, with the biggest variable amplitude under the nitrogen application level of 0.30 g(N)·kg1(soil). Under three nitrogen levels, CO2 enrichment increased spike grain number and the ratio of grain number-leaf area in varying degrees. The grain number-leaf area ratio of two varieties increased most obviously under 0.30 g(N)·kg1(soil) and 0.15 g(N)·kg1(soil), with 44.2% and 41.4% increments compared with the ambient CO2 concentration. Moreover, high CO2 concentration reduced spike grain weight and the ratio of grain weight-leaf area under no nitrogen application, but raised them by 43.6% and 20.7% averagely under nitrogen application. The awn area was only 3% of the total photosynthetic area, greatly smaller than those of other resources organs. It suggested that CO2 enrichment enlarge the photosynthetic area of wheat mainly through elongating leaves and stem. It improved the relationship between sources and sink to increase sink number and mater translocation captivity per unit leaf area simultaneously. Nitrogen addition would promote the response of wheat source and sink growth to CO2 enrichment. |
| 语种 | 中文 |
| 公开日期 | 2014-10-20 |
| 源URL | [http://ir.iswc.ac.cn/handle/361005/5547]  |
| 专题 | 水土保持研究所_水保所知识产出(1956-2013) |
| 推荐引用方式 GB/T 7714 | 许育彬,沈玉芳,李世清. CO2浓度升高和施氮对冬小麦光合面积及粒叶比的影响[J]. 中国生态农业学报,2013,21(09):1049-1056. |
| APA | 许育彬,沈玉芳,&李世清.(2013).CO2浓度升高和施氮对冬小麦光合面积及粒叶比的影响.中国生态农业学报,21(09),1049-1056. |
| MLA | 许育彬,et al."CO2浓度升高和施氮对冬小麦光合面积及粒叶比的影响".中国生态农业学报 21.09(2013):1049-1056. |
入库方式： OAI收割
来源：水土保持研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。