Root Physiological and Morphological Characteristics of Two Rice Cultivars with Different Nitrogen-Use Efficiency
文献类型：期刊论文
| 作者 | Fan Jian-Bo1,2,3; Zhang Ya-Li1,2; Turner, D.4; Duan Yin-Hua1,2; Wang Dong-Sheng1,2; Shen Qi-Rong1,2 |
| 刊名 | PEDOSPHERE
 |
| 出版日期 | 2010-08-01 |
| 卷号 | 20期号:4页码:446-455 |
| 关键词 | N accumulation root bleeding rate root dry weight root surface area total root length |
| ISSN号 | 1002-0160 |
| 通讯作者 | Shen Qi-Rong(shenqirong@njau.edu.cn) |
| 英文摘要 | The variation in nitrogen (N) uptake by rice has been widely studied but differences in rice root morphology that may contribute to this variation are not completely understood. Field and greenhouse experiments were carried out to study N accumulation, root dry weights, total root lengths, root surface areas, and root bleeding rates of two rice cultivars, Elio with low N-use efficiency and Nanguang with high N-use efficiency. Low (1 mmol N L(-1)) and high (5 mmol N L(-1)) N applications were established in the greenhouse experiment, and the N rates were 0, 120, and 240 kg ha(-1) in the field experiments at Jiangning and Jiangpu farms, Nanjing, China. The results showed that the N accumulation, root dry weight, total root length, and root surface area increased with an increase in N application. At the heading stage, N accumulation in the shoots and roots of Nanguang was greater than that of Elio in the field experiments and that of Elio at 5 mmol N L(-1) in the greenhouse experiment. After the heading stage, N accumulation was higher for Nanguang at both 1 and 5 mmol N L(-1) in the greenhouse experiment. The total root length and root surface area were significantly different between the two cultivars. Over the range of the fertilizer application rates, the root lengths of Nanguang at Jiangning Farm were 49%-61% greater at booting and 26%-39% greater at heading than those of Elio, and at Jiangpu Farm they were 22%-42% and 26%-38% greater, respectively. Nanguang had a greater root bleeding rate than Elio. It was concluded that the N-use efficiency of the two rice cultivars studied depended to a great extent on the root morphological parameters and root physiological characteristics at different growth stages. |
| 收录类别 | SCI |
| WOS关键词 | DRY-MATTER ; LOWLAND RICE ; WHEAT ROOTS ; GROWTH ; MAIZE ; ACCUMULATION ; PLANTS ; YIELD ; ASSIMILATION ; CYTOKININS |
| WOS研究方向 | Agriculture |
| WOS类目 | Soil Science |
| 语种 | 英语 |
| WOS记录号 | WOS:000280318600005 |
| 出版者 | SCIENCE PRESS |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2558863 |
| 专题 | 南京土壤研究所 |
| 通讯作者 | Shen Qi-Rong |
| 作者单位 | 1.Nanjing Agr Univ, Jiangsu Prov Key Lab Solid Organ Waste Utilizat, Nanjing 210095, Peoples R China 2.Nanjing Agr Univ, Coll Resources & Environm Sci, Nanjing 210095, Peoples R China 3.Chinese Acad Sci, Inst Soil Sci, Nanjing 210008, Peoples R China 4.Univ Melbourne, Sch Resource Management, Melbourne, Vic 3010, Australia |
| 推荐引用方式 GB/T 7714 | Fan Jian-Bo,Zhang Ya-Li,Turner, D.,et al. Root Physiological and Morphological Characteristics of Two Rice Cultivars with Different Nitrogen-Use Efficiency[J]. PEDOSPHERE,2010,20(4):446-455. |
| APA | Fan Jian-Bo,Zhang Ya-Li,Turner, D.,Duan Yin-Hua,Wang Dong-Sheng,&Shen Qi-Rong.(2010).Root Physiological and Morphological Characteristics of Two Rice Cultivars with Different Nitrogen-Use Efficiency.PEDOSPHERE,20(4),446-455. |
| MLA | Fan Jian-Bo,et al."Root Physiological and Morphological Characteristics of Two Rice Cultivars with Different Nitrogen-Use Efficiency".PEDOSPHERE 20.4(2010):446-455. |
入库方式： iSwitch采集
来源：南京土壤研究所
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。