Reducing nitrogen application with dense planting increases nitrogen use efficiency by maintaining root growth in a double-rice cropping system
| Autor: | Zhen Yang, Guan Xianjiao, Guoqiang Deng, Peng Chunrui, Shan Huang, Xiangcheng Zhu, Qiu Caifei, Chen Jin, Minggang Xu, Chen Xianmao, Tianhua Tu, Shao Caihong, Qian Yinfei, Xie Jiang |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
0106 biological sciences
Field experiment Agriculture (General) chemistry.chemical_element Biomass Environmental pollution Plant Science Biology engineering.material 01 natural sciences S1-972 Cropping system South China Planting density Oryza sativa fungi Sowing food and beverages Agriculture 04 agricultural and veterinary sciences Nitrogen Root morphology chemistry Agronomy 040103 agronomy & agriculture engineering N recovery efficiency 0401 agriculture forestry and fisheries Fertilizer Rice Agronomy and Crop Science 010606 plant biology & botany |
| Zdroj: | Crop Journal, Vol 9, Iss 4, Pp 805-815 (2021) |
| ISSN: | 2214-5141 |
| Popis: | Rational nitrogen (N) application can greatly increase rice (Oryza sativa L.) yield. However, excessive N input can lead not only to low N use efficiency (NUE) but also to severe environmental pollution. Reducing N application rate with a higher planting density (RNHD) is recommended to maintain rice yield and improve NUE. The effects of RNHD on fertilizer N fate and rice root growth traits remain unclear. We accordingly conducted a two-year field experiment to investigate the influence of RNHD on rice yield, fertilizer 15N fate, and root growth in a double-rice cropping system in China. In comparison with the conventional practice of high N application with sparse planting, RNHD resulted in similar yield and biomass production as well as plant N uptake. RNHD increased agronomic NUEs by 23.3%–31.9% (P |
| Databáze: | OpenAIRE |
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