Harvest index and remobilization of 13 elements during wheat grain filling: Experiences from ozone experiments in China and Sweden
文献类型：期刊论文
| 作者 | Broberg, Malin C.; Xu, Yansen ; Feng, Zhaozhong; Pleijel, Hakan
|
| 刊名 | FIELD CROPS RESEARCH
 |
| 出版日期 | 2021-09-15 |
| 卷号 | 271页码:- |
| 关键词 | Element Harvest index Nutrients Ozone Remobilization Triticum aestivum |
| ISSN号 | 0378-4290 |
| 英文摘要 | Wheat efficiently remobilize and allocate a large fraction of aboveground biomass and nutrients into their grains during maturation. This senescence process has been streamlined through crop breeding, which lead to increasing harvest index (HI) for biomass. With field data from two ozone exposure experiments, we derived HI for 13 elements, both nutrients and non-essential, to determine how efficiently they are allocated into the wheat grain in two different agro-ecological environments (Sweden and China) and under different ozone exposure regimes. Element HI ranged from 10 to 90 %, with highest rates for P, N and Zn (90 %, 80 % and 70 %, respectively), while HI was low for the non-mobile elements Ba, Sr and Ca (<10 %). HI for biomass was about 50 %, and the non-essential and toxic element Cd was in the same range (similar to 40 %). Overall element HI was very similar in Chinese and Swedish wheat cultivars. This was also the case when comparing the two Chinese genotypes. We conclude that element HI for wheat crops are highly element specific and not strongly dependent on site or cultivar. Ozone exposure significantly reduced HI for both macmnutrients (Ca, K, Mg, N, P) and micronutrients (Cu, Mn, Mo, Zn), but also for Cd, while there was no ozone effect on the total aboveground pool for any element except P and Ba. Consequently, the reduction in grain element yield induced by elevated ozone, observed in previous studies, can be explained by lower remobilization rates rather than reduced total uptake. Our results provide new insights of nutrient use efficiency in wheat crops in general and under ozone exposure, which can be implemented in crop modelling and also useful for breeding strategies aiming to improve the nutritional value of food crops. |
| WOS研究方向 | Agronomy |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/45478]  |
| 专题 | 生态环境研究中心_城市与区域生态国家重点实验室 |
| 作者单位 | 1.Univ Gothenburg, Dept Biol & Environm Sci, POB 461, SE-40530 Gothenburg, Sweden 2.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Urban & Reg Ecol, 18 Shuangqing Rd, Beijing 100085, Peoples R China 3.Nanjing Univ Informat Sci & Technol, Sch Appl Meteorol, Key Lab Agrometeorol Jiangsu Prov, Nanjing 210044, Peoples R China |
| 推荐引用方式 GB/T 7714 | Broberg, Malin C.,Xu, Yansen,Feng, Zhaozhong,et al. Harvest index and remobilization of 13 elements during wheat grain filling: Experiences from ozone experiments in China and Sweden[J]. FIELD CROPS RESEARCH,2021,271:-. |
| APA | Broberg, Malin C.,Xu, Yansen,Feng, Zhaozhong,&Pleijel, Hakan.(2021).Harvest index and remobilization of 13 elements during wheat grain filling: Experiences from ozone experiments in China and Sweden.FIELD CROPS RESEARCH,271,-. |
| MLA | Broberg, Malin C.,et al."Harvest index and remobilization of 13 elements during wheat grain filling: Experiences from ozone experiments in China and Sweden".FIELD CROPS RESEARCH 271(2021):-. |
入库方式： OAI收割
来源：生态环境研究中心
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