期刊
JOURNAL OF PLANT NUTRITION
卷 42, 期 19, 页码 2624-2641出版社
TAYLOR & FRANCIS INC
DOI: 10.1080/01904167.2019.1656247
关键词
crop growth; crop yield; nitrogen use efficiency; nitrogen fertilizer
资金
- National Key Research and Development Program of China [2017YFC0504704]
- National Natural Science Foundation of China [51669034, 51809224]
- Shaanxi Innovation Talent Promotion Program - Young Science and Technology Star Project [2018KJXX-080]
- Key Scientific Research Program of Education Department of Shaanxi Province [18JS117]
Nitrogen (N) is a primary nutrient for crop growth. In most agricultural areas, crop production relies heavily on the supply of exogenous N fertilizers. Globally, a large amount of nitrogenous fertilizer is applied to achieve maximum crop productivity. However, N fertilizer application is costly and negatively impacts the environment. One way around these problems is to provide a new N-use efficiency (NUE) framework that promotes the efficient acquisition and use of N and high N translocation rates from vegetative organs to reproductive organs under reduced N inputs. This review integrates the current knowledge about the direct and indirect effects of soil properties, crop varieties, soil water status, soil N fertilizers, and soil microbes on N translocation. In addition, we explore strategies that specifically accomplish N translocation via mycorrhizal fungi. Finally, we discuss recent advances in plant physiology, demonstrating that N translocation is an effective target to improve cereal yields and NUE. Although the relationship between crop variety and N translocation is mostly unknown, understanding this relationship is necessary to select and breed crop varieties that exhibit high yields and N translocation efficiency.
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