不同氮效率基因型冬小麦物质生产对CO2浓度升高的响应研究
文献类型：期刊论文
| 作者 | 沈玉芳 ; 许育彬 ; 王佩玲 ; 李世清 |
| 刊名 | 中国生态农业学报
 |
| 出版日期 | 2012 |
| 卷号 | 20期号:04页码:459-465 |
| 关键词 | CO2浓度倍增 Di-atmospheric CO2 concentration 氮素水平 Nitrogen level 冬小麦 Winter wheat 物质生产 Matter production 氮效率 Nitrogen efficiency 产量 Yield |
| 其他题名 | Response of matter production of two winter wheat genotypes with differing |
| 中文摘要 | 采用开顶式气室,以不同氮效率基因型冬小麦品种"小偃6号"(氮低效)和"小偃22号"(氮高效)为供试材料,通过盆栽方法,研究不同施氮水平下大气CO2浓度倍增对冬小麦叶面积、株高、生物量和产量的影响。结果表明,在CO2浓度倍增条件下,施氮后氮高效小麦基因型"小偃22号"穗长、株高显著高于氮低效小麦"小偃6号",但叶面积、茎长则相反。施氮水平、基因型和大气CO2浓度水平均不同程度地影响冬小麦生物量、产量及产量构成。同一施氮条件下,大气CO2浓度倍增使两种氮效率基因型冬小麦产量均显著增加,但增加量不尽一致:N1[0.15 g(N).kg-1(土)]处理时,氮低效"小偃6号"和氮高效"小偃22号"产量分别增加90.5%和52.9%,N2[0.30 g(N).kg-1(土)]处理时分别增加73.9%和93.6%。同一施氮条件下,大气CO2浓度倍增使两种氮效率基因型冬小麦地上部、根系、总生物量、每盆穗数、穗粒数和产量也均显著增加。从不同施氮水平看,大气CO2浓度倍增下(750μmol.mol–1)两种氮效率基因型冬小麦地上部、总生物量、穗粒数和产量均表现为N2>N1>N0。说明在该试验条 |
| 英文摘要 | Atmospheric carbon dioxide (CO2) level continues to rise at an unprecedented rate and is expected to exceed 750 μmol·mol–1 by the end of the 21st century. Increasing atmospheric CO2 concentration has been associated to changes in global environment. The effect of elevated atmospheric CO2, as driven by global environmental change, on agricultural production remains unclear. To further clarify this effect, leaf area, plant height, biomass and yield of two winter wheat varieties (the high N efficiency “Xiaoyan22” and the low N efficiency “Xiaoyan6”) under different atmospheric CO2 (375 μmol·mol− 1 and 750 μmol·mol− 1) and nitrogen amendments [0, 0.15 g(N)·kg−1(soil) and 0.30 g(N)·kg− 1(soil)] conditions were measured in open-top chamber (OTC) pot soil experiments. Results showed that while ear length and plant height of “Xiaoyan22” were significantly higher, leaf area and stem height were lower than those of “Xiaoyan6” for the di-atmospheric CO2 (750 μmol·mol − 1) with nitrogen amended treatments. Compared with ambient atmospheric CO2 level (375 μmol·mol− 1), di-CO2 concentration (750 μmol·mol− 1) significantly improved yields of the two winter wheat varieties under N treatments. Yields of “Xiaoyan6” and “Xiaoyan22” were 90.5% and 52.9% greater under di-CO2 concentration with 0.15 g(N)·kg−1(soil) treatment and also 73.9% and 93.6% greater under di-CO2 concentration with 0.30 g(N)·kg−1(soil) treatment than those under the ambient CO2 condition. Di-CO2 concentration increased above-ground biomass, root biomass, total biomass, spikes per pot, grains per spike and yield of the two winter wheat varieties under the same nitrogen conditions. Although elevated N application exhibited no consistent effects on agricultural production, increasing N supply enhanced above-ground biomass, total biomass, grains per spike and yield. Above-ground biomass, total biomass, grains per spike and yield with di-CO2 condition were higher under 0.30 g(N)·kg−1(soil) treatment than under 0.15 g(N)·kg−1(soil) treatment. The results from this study indicated that increasing N supply benefited the positive effects of elevated CO2 on crop production. |
| 语种 | 中文 |
| 公开日期 | 2014-08-27 |
| 源URL | [http://ir.iswc.ac.cn/handle/361005/5443]  |
| 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 | 沈玉芳,许育彬,王佩玲,等. 不同氮效率基因型冬小麦物质生产对CO2浓度升高的响应研究[J]. 中国生态农业学报,2012,20(04):459-465. |
| APA | 沈玉芳,许育彬,王佩玲,&李世清.(2012).不同氮效率基因型冬小麦物质生产对CO2浓度升高的响应研究.中国生态农业学报,20(04),459-465. |
| MLA | 沈玉芳,et al."不同氮效率基因型冬小麦物质生产对CO2浓度升高的响应研究".中国生态农业学报 20.04(2012):459-465. |
入库方式： OAI收割
来源：水土保持研究所
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