Dynamics of Growth and Nitrogen Capture in Winter Oilseed Rape Hybrid and Line Cultivars under Contrasting N Supply
文献类型：期刊论文
| 作者 | Zhang, Yangyang1,3; Lu, Piaopiao1,3; Ren, Tao1,3; Lu, Jianwei1,3; Wang, Li2 |
| 刊名 | AGRONOMY-BASEL
 |
| 出版日期 | 2020-08-01 |
| 卷号 | 10期号:8页码:17 |
| 关键词 | Brassica napusL logistic equation genotypic variation N use efficiency hybrid |
| DOI | 10.3390/agronomy10081183 |
| 英文摘要 | Cultivation of winter oilseed rape hybrids has been introduced as a promising solution to improve the nitrogen use efficiency (NUE) and to reduce the large N balance surpluses in this crop. To achieve a better understanding of the underlying physiological mechanisms, field experiments were conducted over two years to investigate the dynamics of growth and N capture in an oilseed rape hybrid and its parental lines under both low (0 kg ha(-1)) and high (180 kg ha(-1)) N supply. The results showed that the dynamic trajectories of crop growth and N capture could be accurately characterized by logistic equation using growing degree days as the independent variable. At both N rates, the oilseed rape hybrid outperformed the parental lines in seed yield and aboveground biomass accumulation, which was more closely associated with the longer duration (t(d)) of the rapid growth period (RGP), than with the higher maximum growth rate (v(m)). N uptake was the main factor driving genotypic variation in seed yield, with an increasing importance of N utilization efficiency at high N supply. The hybrid had significantly higher N uptake than the parental lines at both low and high N supply, because of largerv(m)for N accumulation during the RGP, which may present a scope for genetically improving NUE in oilseed rape. High N application enhanced crop biomass production and N accumulation, as a result of prolongedt(d)and largerv(m)during the RGP. The initiation of RGP for N accumulation occurred after overwinter period, which could not be accelerated by high N supply, suggesting rational distribution of N fertilizer with reduced basal dose. However, larger amounts in spring would be beneficial for a better synchronization to crop N demand with lower environmental risks. |
| 资助项目 | National Key Research and Development Program of China[2018YFD0200900] ; earmarked fund for China Agriculture Research System[CARS 12] |
| WOS研究方向 | Agriculture ; Plant Sciences |
| 语种 | 英语 |
| WOS记录号 | WOS:000564874900001 |
| 出版者 | MDPI |
| 源URL | [http://202.127.146.157/handle/2RYDP1HH/15666]  |
| 专题 | 中国科学院武汉植物园 |
| 通讯作者 | Lu, Jianwei; Wang, Li |
| 作者单位 | 1.Huazhong Agr Univ, Coll Resources & Environm, Wuhan 430070, Peoples R China 2.Chinese Acad Sci, Key Lab Aquat Bot & Watershed Ecol, Wuhan Bot Garden, Wuhan 430074, Peoples R China 3.Huazhong Agr Univ, Microelement Res Ctr, Wuhan 430070, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang, Yangyang,Lu, Piaopiao,Ren, Tao,et al. Dynamics of Growth and Nitrogen Capture in Winter Oilseed Rape Hybrid and Line Cultivars under Contrasting N Supply[J]. AGRONOMY-BASEL,2020,10(8):17. |
| APA | Zhang, Yangyang,Lu, Piaopiao,Ren, Tao,Lu, Jianwei,&Wang, Li.(2020).Dynamics of Growth and Nitrogen Capture in Winter Oilseed Rape Hybrid and Line Cultivars under Contrasting N Supply.AGRONOMY-BASEL,10(8),17. |
| MLA | Zhang, Yangyang,et al."Dynamics of Growth and Nitrogen Capture in Winter Oilseed Rape Hybrid and Line Cultivars under Contrasting N Supply".AGRONOMY-BASEL 10.8(2020):17. |
入库方式： OAI收割
来源：武汉植物园
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